diff --git a/.beads/issues.jsonl b/.beads/issues.jsonl
index d71c8e6..8cb8c16 100644
--- a/.beads/issues.jsonl
+++ b/.beads/issues.jsonl
@@ -9,6 +9,7 @@
 {"id":"books-ced","title":"brug smb om regnskab + fropntend designer til at sikrer at alt er godt for både balance og kontooversigt","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:25:46.484629+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:47:52.42433+01:00","closed_at":"2026-01-30T14:47:52.42433+01:00","close_reason":"Closed"}
 {"id":"books-h6e","title":"fjern hurtig bogføring og den visning der høre dertil","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:14:50.436314+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:18:09.911294+01:00","closed_at":"2026-01-30T14:18:09.911294+01:00","close_reason":"Closed"}
 {"id":"books-hzt","title":"fix bug med tilføj brugere står forkert med encoded tegn","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:21:34.556319+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:28:31.320973+01:00","closed_at":"2026-01-30T14:28:31.320973+01:00","close_reason":"Closed"}
+{"id":"books-ljg","title":"Fjern mock data og kobl frontend til backend GraphQL","description":"Frontend bruger ~2000 linjer hardcoded mock data i stedet for at bruge de eksisterende GraphQL hooks.\n\n## Problem\n- Backend GraphQL API er klar med queries og mutations\n- Frontend har hooks skrevet (useAccounts, useFiscalYears, etc.)\n- Men pages bruger hardcoded mock data i stedet for at kalde hooks\n\n## Filer der skal opdateres\n1. Dashboard.tsx - mock metrics, charts, transactions\n2. Kassekladde.tsx - mock accounts og posteringer  \n3. Kontooversigt.tsx - mock kontoplan og balancer\n4. Bankafstemning.tsx - mock bank accounts og transaktioner\n5. FiscalYearSelector.tsx - mock fiscal years\n6. CompanySwitcher.tsx - mock companies\n7. Stores (companyStore, periodStore) - skal initialiseres fra API\n\n## Acceptkriterier\n- Al mock data fjernet fra frontend\n- Alle pages bruger GraphQL hooks til at hente data\n- Stores initialiseres korrekt ved app start\n- Data vises fra backend i UI","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T22:27:49.225279+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T22:42:04.17437+01:00","closed_at":"2026-01-30T22:42:04.17437+01:00","close_reason":"Closed"}
 {"id":"books-sbm","title":"ændre navnet i venstre side til Books","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:11:13.017202+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:12:14.16594+01:00","closed_at":"2026-01-30T14:12:14.16594+01:00","close_reason":"Closed"}
 {"id":"books-wqf","title":"Opret en logud knap i topbaren","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:06:06.999508+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:10:52.860045+01:00","closed_at":"2026-01-30T14:10:52.860045+01:00","close_reason":"Closed"}
 {"id":"books-wzq","title":"tilføj en lille disclaimer på alle områder, hvor der er statisk data. brug gerne planning mode","status":"closed","priority":2,"issue_type":"task","owner":"nhh@softwarehuset.com","created_at":"2026-01-30T14:22:53.728536+01:00","created_by":"Nicolaj Hartmann","updated_at":"2026-01-30T14:40:44.557962+01:00","closed_at":"2026-01-30T14:40:44.557962+01:00","close_reason":"Closed"}
diff --git a/frontend/src/components/layout/CompanySwitcher.tsx b/frontend/src/components/layout/CompanySwitcher.tsx
index 86ec65e..896a493 100644
--- a/frontend/src/components/layout/CompanySwitcher.tsx
+++ b/frontend/src/components/layout/CompanySwitcher.tsx
@@ -1,6 +1,8 @@
-import { Select, Space, Typography, Tag } from 'antd';
+import { useEffect } from 'react';
+import { Select, Space, Typography, Tag, Skeleton } from 'antd';
 import { ShopOutlined } from '@ant-design/icons';
 import { useCompanyStore } from '@/stores/companyStore';
+import { useMyCompanies } from '@/api/queries/companyQueries';
 import { formatCVR } from '@/lib/formatters';
 import type { Company } from '@/types/accounting';
 
@@ -10,48 +12,19 @@ interface CompanySwitcherProps {
   compact?: boolean;
 }
 
-// Mock data - will be replaced with API call
-const mockCompanies: Company[] = [
-  {
-    id: '1',
-    name: 'Demo Virksomhed ApS',
-    cvr: '12345678',
-    address: 'Hovedgaden 1',
-    city: 'Koebenhavn',
-    postalCode: '1000',
-    country: 'DK',
-    fiscalYearStart: 1,
-    currency: 'DKK',
-    createdAt: '2024-01-01',
-    updatedAt: '2024-01-01',
-  },
-  {
-    id: '2',
-    name: 'Anden Virksomhed A/S',
-    cvr: '87654321',
-    address: 'Sidegaden 2',
-    city: 'Aarhus',
-    postalCode: '8000',
-    country: 'DK',
-    fiscalYearStart: 7,
-    currency: 'DKK',
-    createdAt: '2024-01-01',
-    updatedAt: '2024-01-01',
-  },
-];
-
 export default function CompanySwitcher({ compact = false }: CompanySwitcherProps) {
+  const { data: companies = [], isLoading } = useMyCompanies();
   const { activeCompany, setActiveCompany, setCompanies } = useCompanyStore();
 
-  // Initialize with mock data if needed
-  if (useCompanyStore.getState().companies.length === 0) {
-    setCompanies(mockCompanies);
-    if (!activeCompany) {
-      setActiveCompany(mockCompanies[0]);
+  // Sync companies with store when data changes
+  useEffect(() => {
+    if (companies.length > 0) {
+      setCompanies(companies);
+      if (!activeCompany) {
+        setActiveCompany(companies[0]);
+      }
     }
-  }
-
-  const companies = useCompanyStore((state) => state.companies);
+  }, [companies, activeCompany, setActiveCompany, setCompanies]);
 
   const handleCompanyChange = (companyId: string) => {
     const company = companies.find((c) => c.id === companyId);
@@ -60,6 +33,14 @@ export default function CompanySwitcher({ compact = false }: CompanySwitcherProp
     }
   };
 
+  if (isLoading) {
+    return <Skeleton.Input style={{ width: 200 }} active />;
+  }
+
+  if (companies.length === 0) {
+    return null;
+  }
+
   return (
     <Space>
       <ShopOutlined style={{ fontSize: 18, color: '#1677ff' }} />
diff --git a/frontend/src/components/layout/FiscalYearSelector.tsx b/frontend/src/components/layout/FiscalYearSelector.tsx
index 85eaef4..730a80e 100644
--- a/frontend/src/components/layout/FiscalYearSelector.tsx
+++ b/frontend/src/components/layout/FiscalYearSelector.tsx
@@ -1,7 +1,7 @@
-// FiscalYearSelector - Dropdown for selecting active fiscal year (regnskabsår)
+// FiscalYearSelector - Dropdown for selecting active fiscal year (regnskabsar)
 
 import { useState, useEffect } from 'react';
-import { Select, Space, Typography, Tag, Divider, Button } from 'antd';
+import { Select, Space, Typography, Tag, Divider, Button, Skeleton } from 'antd';
 import {
   CalendarOutlined,
   PlusOutlined,
@@ -11,53 +11,14 @@ import {
   LockOutlined,
 } from '@ant-design/icons';
 import { usePeriodStore } from '@/stores/periodStore';
+import { useCompanyStore } from '@/stores/companyStore';
+import { useFiscalYears } from '@/api/queries/fiscalYearQueries';
 import type { FiscalYear } from '@/types/periods';
 import { formatDateShort } from '@/lib/formatters';
 import CreateFiscalYearModal from '@/components/modals/CreateFiscalYearModal';
 
 const { Text } = Typography;
 
-// Mock data - will be replaced with API call
-const mockFiscalYears: FiscalYear[] = [
-  {
-    id: 'fy-2025',
-    companyId: '1',
-    name: '2025',
-    startDate: '2025-01-01',
-    endDate: '2025-12-31',
-    status: 'open',
-    openingBalancePosted: true,
-    createdAt: '2025-01-01',
-    updatedAt: '2025-01-01',
-  },
-  {
-    id: 'fy-2024',
-    companyId: '1',
-    name: '2024',
-    startDate: '2024-01-01',
-    endDate: '2024-12-31',
-    status: 'closed',
-    closingDate: '2025-01-15',
-    closedBy: 'user-1',
-    openingBalancePosted: true,
-    createdAt: '2024-01-01',
-    updatedAt: '2025-01-15',
-  },
-  {
-    id: 'fy-2023',
-    companyId: '1',
-    name: '2023',
-    startDate: '2023-01-01',
-    endDate: '2023-12-31',
-    status: 'locked',
-    closingDate: '2024-01-20',
-    closedBy: 'user-1',
-    openingBalancePosted: true,
-    createdAt: '2023-01-01',
-    updatedAt: '2024-01-20',
-  },
-];
-
 /**
  * Status badge configuration
  */
@@ -69,7 +30,7 @@ const STATUS_CONFIG: Record<FiscalYear['status'], {
   open: {
     color: 'success',
     icon: <CheckCircleOutlined />,
-    label: 'Åben',
+    label: 'Aben',
   },
   closed: {
     color: 'warning',
@@ -79,7 +40,7 @@ const STATUS_CONFIG: Record<FiscalYear['status'], {
   locked: {
     color: 'error',
     icon: <LockOutlined />,
-    label: 'Låst',
+    label: 'Last',
   },
 };
 
@@ -89,6 +50,7 @@ interface FiscalYearSelectorProps {
 }
 
 export default function FiscalYearSelector({ onCreateNew, onManage }: FiscalYearSelectorProps) {
+  const { activeCompany } = useCompanyStore();
   const {
     fiscalYears,
     currentFiscalYear,
@@ -96,14 +58,16 @@ export default function FiscalYearSelector({ onCreateNew, onManage }: FiscalYear
     setCurrentFiscalYear,
   } = usePeriodStore();
 
+  const { data: fiscalYearsData = [], isLoading } = useFiscalYears(activeCompany?.id);
+
   const [createModalOpen, setCreateModalOpen] = useState(false);
 
-  // Initialize with mock data if needed (will be replaced with API call)
+  // Sync fiscal years with store when data changes
   useEffect(() => {
-    if (fiscalYears.length === 0) {
-      setFiscalYears(mockFiscalYears);
+    if (fiscalYearsData.length > 0) {
+      setFiscalYears(fiscalYearsData);
     }
-  }, [fiscalYears.length, setFiscalYears]);
+  }, [fiscalYearsData, setFiscalYears]);
 
   // Set default fiscal year if none selected
   useEffect(() => {
@@ -147,6 +111,10 @@ export default function FiscalYearSelector({ onCreateNew, onManage }: FiscalYear
     }
   };
 
+  if (isLoading) {
+    return <Skeleton.Input style={{ width: 200 }} active />;
+  }
+
   // Sort fiscal years by start date descending (newest first)
   const sortedYears = [...fiscalYears].sort(
     (a, b) => new Date(b.startDate).getTime() - new Date(a.startDate).getTime()
@@ -172,7 +140,7 @@ export default function FiscalYearSelector({ onCreateNew, onManage }: FiscalYear
                 onClick={handleCreateNew}
                 size="small"
               >
-                Opret nyt regnskabsår
+                Opret nyt regnskabsar
               </Button>
               <Button
                 type="text"
@@ -187,7 +155,7 @@ export default function FiscalYearSelector({ onCreateNew, onManage }: FiscalYear
         )}
         options={sortedYears.map((year) => ({
           value: year.id,
-          label: `Regnskabsår ${year.name}`,
+          label: `Regnskabsar ${year.name}`,
           year,
         }))}
         optionRender={(option) => {
diff --git a/frontend/src/pages/Bankafstemning.tsx b/frontend/src/pages/Bankafstemning.tsx
index 30caf4f..9c6bcbf 100644
--- a/frontend/src/pages/Bankafstemning.tsx
+++ b/frontend/src/pages/Bankafstemning.tsx
@@ -18,6 +18,8 @@ import {
   message,
   Tooltip,
   Alert,
+  Skeleton,
+  Empty,
 } from 'antd';
 import {
   SwapOutlined,
@@ -30,147 +32,80 @@ import {
 import dayjs from 'dayjs';
 import { useCompany } from '@/hooks/useCompany';
 import { useReconciliationStore } from '@/stores/reconciliationStore';
+import { useCompanyStore } from '@/stores/companyStore';
+import { useActiveBankConnections } from '@/api/queries/bankConnectionQueries';
+import { usePendingBankTransactions } from '@/api/queries/bankTransactionQueries';
 import { formatCurrency, formatDate } from '@/lib/formatters';
 import { accountingColors } from '@/styles/theme';
-import type { BankTransaction, BankAccount } from '@/types/accounting';
+import type { BankTransaction } from '@/types/accounting';
 
 const { Title, Text } = Typography;
 const { RangePicker } = DatePicker;
 
-// Mock data
-const mockBankAccounts: BankAccount[] = [
-  {
-    id: '1',
-    companyId: '1',
-    name: 'Erhvervskonto',
-    bankName: 'Danske Bank',
-    accountNumber: '1234-5678901234',
-    iban: 'DK1234567890123456',
-    currency: 'DKK',
-    ledgerAccountId: '1',
-    isActive: true,
-  },
-  {
-    id: '2',
-    companyId: '1',
-    name: 'Opsparingskonto',
-    bankName: 'Nordea',
-    accountNumber: '9876-5432109876',
-    iban: 'DK9876543210987654',
-    currency: 'DKK',
-    ledgerAccountId: '2',
-    isActive: true,
-  },
-];
-
-const mockBankTransactions: BankTransaction[] = [
-  {
-    id: 'bt1',
-    bankAccountId: '1',
-    date: '2025-01-15',
-    valueDate: '2025-01-15',
-    description: 'FAKTURA 1234 FRA KUNDE A/S',
-    amount: 15625,
-    balance: 156250,
-    reference: 'FI1234',
-    counterparty: 'Kunde A/S',
-    isReconciled: false,
-    importedAt: '2025-01-16T08:00:00Z',
-  },
-  {
-    id: 'bt2',
-    bankAccountId: '1',
-    date: '2025-01-14',
-    valueDate: '2025-01-14',
-    description: 'HUSLEJE JANUAR EJENDOM APS',
-    amount: -15000,
-    balance: 140625,
-    reference: 'BS123456',
-    counterparty: 'Ejendom ApS',
-    isReconciled: false,
-    importedAt: '2025-01-16T08:00:00Z',
-  },
-  {
-    id: 'bt3',
-    bankAccountId: '1',
-    date: '2025-01-13',
-    valueDate: '2025-01-13',
-    description: 'MOBILEPAY STAPLES',
-    amount: -499,
-    balance: 155625,
-    counterparty: 'Staples',
-    isReconciled: false,
-    importedAt: '2025-01-16T08:00:00Z',
-  },
-  {
-    id: 'bt4',
-    bankAccountId: '1',
-    date: '2025-01-10',
-    valueDate: '2025-01-10',
-    description: 'OVERFOERSEL FRA DEBITOR',
-    amount: 8750,
-    balance: 156124,
-    reference: 'FAKTURA1233',
-    counterparty: 'Debitor B ApS',
-    isReconciled: true,
-    matchedTransactionId: 'tx3',
-    importedAt: '2025-01-11T08:00:00Z',
-  },
-];
-
-const mockLedgerEntries = [
-  {
-    id: 'le1',
-    date: '2025-01-15',
-    description: 'Faktura #1234 - Kunde A/S',
-    amount: 15625,
-    accountId: '1',
-    accountName: '1000 Bank',
-    transactionNumber: '2025-0001',
-    isReconciled: false,
-  },
-  {
-    id: 'le2',
-    date: '2025-01-14',
-    description: 'Husleje januar 2025',
-    amount: -15000,
-    accountId: '1',
-    accountName: '1000 Bank',
-    transactionNumber: '2025-0002',
-    isReconciled: false,
-  },
-  {
-    id: 'le3',
-    date: '2025-01-12',
-    description: 'Kontorartikler',
-    amount: -500,
-    accountId: '1',
-    accountName: '1000 Bank',
-    transactionNumber: '2025-0003',
-    isReconciled: false,
-  },
-];
-
-// Match suggestions (would come from backend AI/rules)
-const mockSuggestions = [
-  {
-    bankTransactionId: 'bt1',
-    ledgerEntryId: 'le1',
-    confidence: 0.95,
-    reason: 'Beløb og dato matcher, "Faktura 1234" findes i begge',
-  },
-  {
-    bankTransactionId: 'bt2',
-    ledgerEntryId: 'le2',
-    confidence: 0.88,
-    reason: 'Beløb matcher, begge er husleje i januar',
-  },
-];
+// Type for ledger entries (API not implemented yet)
+interface LedgerEntry {
+  id: string;
+  date: string;
+  description: string;
+  amount: number;
+  accountId: string;
+  accountName: string;
+  transactionNumber: string;
+  isReconciled: boolean;
+}
 
+// Type for match suggestions (API not implemented yet)
+interface MatchSuggestion {
+  bankTransactionId: string;
+  ledgerEntryId: string;
+  confidence: number;
+  reason: string;
+}
 
 export default function Bankafstemning() {
   const { company } = useCompany();
-  const [selectedBankAccount, setSelectedBankAccount] = useState<string>(mockBankAccounts[0].id);
+  const { activeCompany } = useCompanyStore();
+
+  // Fetch data from API
+  const { data: bankConnections = [], isLoading: connectionsLoading } = useActiveBankConnections(activeCompany?.id);
+  const { data: pendingTransactions = [], isLoading: transactionsLoading } = usePendingBankTransactions(activeCompany?.id);
+
+  const isLoading = connectionsLoading || transactionsLoading;
+
+  // Convert bankConnections to bankAccounts format
+  const bankAccounts = bankConnections.flatMap(conn =>
+    (conn.accounts || []).map(acc => ({
+      id: acc.accountId,
+      companyId: activeCompany?.id || '',
+      name: acc.name || acc.iban,
+      bankName: conn.aspspName,
+      accountNumber: acc.iban,
+      iban: acc.iban,
+      currency: acc.currency,
+      ledgerAccountId: acc.linkedAccountId || '',
+      isActive: conn.isActive,
+    }))
+  );
+
+  // Convert pendingTransactions to display format
+  const allBankTransactions: BankTransaction[] = pendingTransactions.map(tx => ({
+    id: tx.id,
+    bankAccountId: tx.bankAccountId,
+    date: tx.date,
+    valueDate: tx.date,
+    description: tx.description,
+    amount: tx.amount,
+    balance: 0, // Not available from API yet
+    counterparty: tx.counterparty,
+    isReconciled: tx.isBooked,
+    importedAt: new Date().toISOString(),
+  }));
+
+  // For ledgerEntries and suggestions - show empty state as they are not implemented in API yet
+  const allLedgerEntries: LedgerEntry[] = [];
+  const matchSuggestions: MatchSuggestion[] = [];
+
+  const [selectedBankAccount, setSelectedBankAccount] = useState<string>('');
   const [dateRange, setDateRange] = useState<[dayjs.Dayjs, dayjs.Dayjs]>([
     dayjs().startOf('month'),
     dayjs().endOf('month'),
@@ -190,11 +125,14 @@ export default function Bankafstemning() {
     removePendingMatch,
   } = useReconciliationStore();
 
+  // Set default selected bank account when accounts are loaded
+  const effectiveSelectedAccount = selectedBankAccount || (bankAccounts.length > 0 ? bankAccounts[0].id : '');
+
   // Filter transactions
-  const bankTransactions = mockBankTransactions.filter(
-    (tx) => tx.bankAccountId === selectedBankAccount && !tx.isReconciled
+  const bankTransactions = allBankTransactions.filter(
+    (tx) => tx.bankAccountId === effectiveSelectedAccount && !tx.isReconciled
   );
-  const ledgerEntries = mockLedgerEntries.filter((entry) => !entry.isReconciled);
+  const ledgerEntries = allLedgerEntries.filter((entry) => !entry.isReconciled);
 
   // Calculate totals
   const bankTotal = bankTransactions.reduce((sum, tx) => sum + tx.amount, 0);
@@ -207,7 +145,7 @@ export default function Bankafstemning() {
 
   // Get suggestion for a bank transaction
   const getSuggestion = (bankTxId: string) => {
-    return mockSuggestions.find((s) => s.bankTransactionId === bankTxId);
+    return matchSuggestions.find((s) => s.bankTransactionId === bankTxId);
   };
 
   const handleMatch = () => {
@@ -222,7 +160,7 @@ export default function Bankafstemning() {
         ledgerTransactionId: ledgerEntry.id,
         matchType: 'existing',
       });
-      message.success('Match tilføjet');
+      message.success('Match tilfojet');
     }
   };
 
@@ -270,7 +208,7 @@ export default function Bankafstemning() {
     message.success(`${pendingMatches.length} afstemninger gemt`);
   };
 
-  const handleApplySuggestion = (suggestion: typeof mockSuggestions[0]) => {
+  const handleApplySuggestion = (suggestion: MatchSuggestion) => {
     addPendingMatch({
       bankTransactionId: suggestion.bankTransactionId,
       ledgerTransactionId: suggestion.ledgerEntryId,
@@ -279,6 +217,28 @@ export default function Bankafstemning() {
     message.success('Forslag anvendt');
   };
 
+  // Loading state
+  if (isLoading) {
+    return (
+      <div>
+        <Skeleton active paragraph={{ rows: 2 }} />
+        <Row gutter={16} style={{ marginTop: 16 }}>
+          <Col span={12}><Skeleton active paragraph={{ rows: 8 }} /></Col>
+          <Col span={12}><Skeleton active paragraph={{ rows: 8 }} /></Col>
+        </Row>
+      </div>
+    );
+  }
+
+  // Empty state - no bank connections
+  if (bankAccounts.length === 0) {
+    return (
+      <Empty
+        description="Ingen bankforbindelser. Opret forbindelse til din bank under Indstillinger."
+      />
+    );
+  }
+
   return (
     <div>
       {/* Header */}
@@ -321,10 +281,10 @@ export default function Bankafstemning() {
       {/* Filters */}
       <Space style={{ marginBottom: 16 }} wrap>
         <Select
-          value={selectedBankAccount}
+          value={effectiveSelectedAccount}
           onChange={setSelectedBankAccount}
           style={{ width: 250 }}
-          options={mockBankAccounts.map((acc) => ({
+          options={bankAccounts.map((acc) => ({
             value: acc.id,
             label: `${acc.bankName} - ${acc.name}`,
           }))}
@@ -354,7 +314,7 @@ export default function Bankafstemning() {
         <Col span={8}>
           <Card size="small">
             <Statistic
-              title="Bogføring (uafstemt)"
+              title="Bogforing (uafstemt)"
               value={ledgerTotal}
               precision={2}
               formatter={(value) => formatCurrency(value as number)}
@@ -383,12 +343,12 @@ export default function Bankafstemning() {
       </Row>
 
       {/* Suggestions Alert */}
-      {mockSuggestions.length > 0 && (
+      {matchSuggestions.length > 0 && (
         <Alert
           message={
             <Space>
               <BulbOutlined />
-              <Text strong>{mockSuggestions.length} automatiske matchforslag fundet</Text>
+              <Text strong>{matchSuggestions.length} automatiske matchforslag fundet</Text>
             </Space>
           }
           type="info"
@@ -396,7 +356,7 @@ export default function Bankafstemning() {
           action={
             <Button
               size="small"
-              onClick={() => mockSuggestions.forEach(handleApplySuggestion)}
+              onClick={() => matchSuggestions.forEach(handleApplySuggestion)}
             >
               Anvend alle
             </Button>
@@ -414,7 +374,7 @@ export default function Bankafstemning() {
           disabled={!canMatch}
         >
           Match valgte ({selectedBankTransactions.length} bank,{' '}
-          {selectedLedgerTransactions.length} bogføring)
+          {selectedLedgerTransactions.length} bogforing)
         </Button>
       </div>
 
@@ -432,95 +392,102 @@ export default function Bankafstemning() {
             size="small"
             bodyStyle={{ padding: 0, maxHeight: 500, overflow: 'auto' }}
           >
-            <List
-              dataSource={bankTransactions}
-              renderItem={(tx) => {
-                const suggestion = getSuggestion(tx.id);
-                const isPending = pendingMatches.some(
-                  (m) => m.bankTransactionId === tx.id
-                );
-                const isSelected = selectedBankTransactions.includes(tx.id);
+            {bankTransactions.length === 0 ? (
+              <Empty
+                description="Ingen uafstemte banktransaktioner"
+                style={{ padding: 24 }}
+              />
+            ) : (
+              <List
+                dataSource={bankTransactions}
+                renderItem={(tx) => {
+                  const suggestion = getSuggestion(tx.id);
+                  const isPending = pendingMatches.some(
+                    (m) => m.bankTransactionId === tx.id
+                  );
+                  const isSelected = selectedBankTransactions.includes(tx.id);
 
-                if (isPending) return null;
+                  if (isPending) return null;
 
-                return (
-                  <List.Item
-                    style={{
-                      padding: '8px 16px',
-                      cursor: 'pointer',
-                      backgroundColor: isSelected ? '#e6f4ff' : undefined,
-                    }}
-                    onClick={() => toggleBankTransaction(tx.id)}
-                  >
-                    <div style={{ width: '100%' }}>
-                      <div
-                        style={{
-                          display: 'flex',
-                          justifyContent: 'space-between',
-                          alignItems: 'flex-start',
-                        }}
-                      >
-                        <Space>
-                          <Checkbox checked={isSelected} />
-                          <div>
-                            <Text style={{ display: 'block' }}>
-                              {tx.description}
-                            </Text>
-                            <Text type="secondary" style={{ fontSize: 12 }}>
-                              {formatDate(tx.date)} • {tx.counterparty || 'Ukendt'}
-                            </Text>
-                          </div>
-                        </Space>
-                        <div style={{ textAlign: 'right' }}>
-                          <Text
-                            strong
-                            className="tabular-nums"
-                            style={{
-                              color:
-                                tx.amount >= 0
-                                  ? accountingColors.credit
-                                  : accountingColors.debit,
-                            }}
-                          >
-                            {formatCurrency(tx.amount, { showSign: true })}
-                          </Text>
-                          {suggestion && (
-                            <div>
-                              <Tooltip title={suggestion.reason}>
-                                <Tag
-                                  color="green"
-                                  style={{ cursor: 'pointer', marginTop: 4 }}
-                                  onClick={(e) => {
-                                    e.stopPropagation();
-                                    handleApplySuggestion(suggestion);
-                                  }}
-                                >
-                                  <BulbOutlined />{' '}
-                                  {Math.round(suggestion.confidence * 100)}% match
-                                </Tag>
-                              </Tooltip>
-                            </div>
-                          )}
-                        </div>
-                      </div>
-                      <div style={{ marginTop: 4 }}>
-                        <Button
-                          type="link"
-                          size="small"
-                          icon={<PlusOutlined />}
-                          onClick={(e) => {
-                            e.stopPropagation();
-                            handleCreateEntry(tx);
+                  return (
+                    <List.Item
+                      style={{
+                        padding: '8px 16px',
+                        cursor: 'pointer',
+                        backgroundColor: isSelected ? '#e6f4ff' : undefined,
+                      }}
+                      onClick={() => toggleBankTransaction(tx.id)}
+                    >
+                      <div style={{ width: '100%' }}>
+                        <div
+                          style={{
+                            display: 'flex',
+                            justifyContent: 'space-between',
+                            alignItems: 'flex-start',
                           }}
                         >
-                          Opret postering
-                        </Button>
+                          <Space>
+                            <Checkbox checked={isSelected} />
+                            <div>
+                              <Text style={{ display: 'block' }}>
+                                {tx.description}
+                              </Text>
+                              <Text type="secondary" style={{ fontSize: 12 }}>
+                                {formatDate(tx.date)} - {tx.counterparty || 'Ukendt'}
+                              </Text>
+                            </div>
+                          </Space>
+                          <div style={{ textAlign: 'right' }}>
+                            <Text
+                              strong
+                              className="tabular-nums"
+                              style={{
+                                color:
+                                  tx.amount >= 0
+                                    ? accountingColors.credit
+                                    : accountingColors.debit,
+                              }}
+                            >
+                              {formatCurrency(tx.amount, { showSign: true })}
+                            </Text>
+                            {suggestion && (
+                              <div>
+                                <Tooltip title={suggestion.reason}>
+                                  <Tag
+                                    color="green"
+                                    style={{ cursor: 'pointer', marginTop: 4 }}
+                                    onClick={(e) => {
+                                      e.stopPropagation();
+                                      handleApplySuggestion(suggestion);
+                                    }}
+                                  >
+                                    <BulbOutlined />{' '}
+                                    {Math.round(suggestion.confidence * 100)}% match
+                                  </Tag>
+                                </Tooltip>
+                              </div>
+                            )}
+                          </div>
+                        </div>
+                        <div style={{ marginTop: 4 }}>
+                          <Button
+                            type="link"
+                            size="small"
+                            icon={<PlusOutlined />}
+                            onClick={(e) => {
+                              e.stopPropagation();
+                              handleCreateEntry(tx);
+                            }}
+                          >
+                            Opret postering
+                          </Button>
+                        </div>
                       </div>
-                    </div>
-                  </List.Item>
-                );
-              }}
-            />
+                    </List.Item>
+                  );
+                }}
+              />
+            )}
           </Card>
         </Col>
 
@@ -529,70 +496,77 @@ export default function Bankafstemning() {
           <Card
             title={
               <Space>
-                <Text strong>Bogføringsposter</Text>
+                <Text strong>Bogforingsposter</Text>
                 <Tag color="orange">{ledgerEntries.length} uafstemte</Tag>
               </Space>
             }
             size="small"
             bodyStyle={{ padding: 0, maxHeight: 500, overflow: 'auto' }}
           >
-            <List
-              dataSource={ledgerEntries}
-              renderItem={(entry) => {
-                const isPending = pendingMatches.some(
-                  (m) => m.ledgerTransactionId === entry.id
-                );
-                const isSelected = selectedLedgerTransactions.includes(entry.id);
+            {ledgerEntries.length === 0 ? (
+              <Empty
+                description="Ingen uafstemte bogforingsposter (API ikke implementeret endnu)"
+                style={{ padding: 24 }}
+              />
+            ) : (
+              <List
+                dataSource={ledgerEntries}
+                renderItem={(entry) => {
+                  const isPending = pendingMatches.some(
+                    (m) => m.ledgerTransactionId === entry.id
+                  );
+                  const isSelected = selectedLedgerTransactions.includes(entry.id);
 
-                if (isPending) return null;
+                  if (isPending) return null;
 
-                return (
-                  <List.Item
-                    style={{
-                      padding: '8px 16px',
-                      cursor: 'pointer',
-                      backgroundColor: isSelected ? '#e6f4ff' : undefined,
-                    }}
-                    onClick={() => toggleLedgerTransaction(entry.id)}
-                  >
-                    <div style={{ width: '100%' }}>
-                      <div
-                        style={{
-                          display: 'flex',
-                          justifyContent: 'space-between',
-                          alignItems: 'flex-start',
-                        }}
-                      >
-                        <Space>
-                          <Checkbox checked={isSelected} />
-                          <div>
-                            <Text style={{ display: 'block' }}>
-                              {entry.description}
-                            </Text>
-                            <Text type="secondary" style={{ fontSize: 12 }}>
-                              {formatDate(entry.date)} • Bilag{' '}
-                              {entry.transactionNumber}
-                            </Text>
-                          </div>
-                        </Space>
-                        <Text
-                          strong
-                          className="tabular-nums"
+                  return (
+                    <List.Item
+                      style={{
+                        padding: '8px 16px',
+                        cursor: 'pointer',
+                        backgroundColor: isSelected ? '#e6f4ff' : undefined,
+                      }}
+                      onClick={() => toggleLedgerTransaction(entry.id)}
+                    >
+                      <div style={{ width: '100%' }}>
+                        <div
                           style={{
-                            color:
-                              entry.amount >= 0
-                                ? accountingColors.credit
-                                : accountingColors.debit,
+                            display: 'flex',
+                            justifyContent: 'space-between',
+                            alignItems: 'flex-start',
                           }}
                         >
-                          {formatCurrency(entry.amount, { showSign: true })}
-                        </Text>
+                          <Space>
+                            <Checkbox checked={isSelected} />
+                            <div>
+                              <Text style={{ display: 'block' }}>
+                                {entry.description}
+                              </Text>
+                              <Text type="secondary" style={{ fontSize: 12 }}>
+                                {formatDate(entry.date)} - Bilag{' '}
+                                {entry.transactionNumber}
+                              </Text>
+                            </div>
+                          </Space>
+                          <Text
+                            strong
+                            className="tabular-nums"
+                            style={{
+                              color:
+                                entry.amount >= 0
+                                  ? accountingColors.credit
+                                  : accountingColors.debit,
+                            }}
+                          >
+                            {formatCurrency(entry.amount, { showSign: true })}
+                          </Text>
+                        </div>
                       </div>
-                    </div>
-                  </List.Item>
-                );
-              }}
-            />
+                    </List.Item>
+                  );
+                }}
+              />
+            )}
           </Card>
         </Col>
       </Row>
@@ -612,10 +586,10 @@ export default function Bankafstemning() {
           <List
             dataSource={pendingMatches}
             renderItem={(match) => {
-              const bankTx = mockBankTransactions.find(
+              const bankTx = allBankTransactions.find(
                 (tx) => tx.id === match.bankTransactionId
               );
-              const ledgerEntry = mockLedgerEntries.find(
+              const ledgerEntry = allLedgerEntries.find(
                 (e) => e.id === match.ledgerTransactionId
               );
 
@@ -653,7 +627,7 @@ export default function Bankafstemning() {
 
       {/* Create Entry Modal */}
       <Modal
-        title="Opret bogføringspost"
+        title="Opret bogforingspost"
         open={isCreateModalOpen}
         onCancel={() => {
           setIsCreateModalOpen(false);
@@ -670,7 +644,7 @@ export default function Bankafstemning() {
                 <Text>Banktransaktion:</Text>
                 <Text strong>{selectedBankTx.description}</Text>
                 <Text>
-                  {formatDate(selectedBankTx.date)} •{' '}
+                  {formatDate(selectedBankTx.date)} -{' '}
                   {formatCurrency(selectedBankTx.amount, { showSign: true })}
                 </Text>
               </Space>
@@ -700,22 +674,22 @@ export default function Bankafstemning() {
             rules={[{ required: true }]}
           >
             <Select
-              placeholder="Vælg konto"
+              placeholder="Vaelg konto"
               options={[
                 { value: '6100', label: '6100 - Husleje' },
                 { value: '6800', label: '6800 - Kontorartikler' },
-                { value: '5000', label: '5000 - Varekøb' },
+                { value: '5000', label: '5000 - Varekob' },
                 { value: '4000', label: '4000 - Salg' },
               ]}
             />
           </Form.Item>
           <Form.Item name="vatCode" label="Momskode">
             <Select
-              placeholder="Vælg momskode"
+              placeholder="Vaelg momskode"
               allowClear
               options={[
-                { value: 'K25', label: 'K25 - Indgående moms 25%' },
-                { value: 'S25', label: 'S25 - Udgående moms 25%' },
+                { value: 'K25', label: 'K25 - Indgaaende moms 25%' },
+                { value: 'S25', label: 'S25 - Udgaaende moms 25%' },
                 { value: 'NONE', label: 'Ingen moms' },
               ]}
             />
diff --git a/frontend/src/pages/Dashboard.tsx b/frontend/src/pages/Dashboard.tsx
index 212a858..e5c0c25 100644
--- a/frontend/src/pages/Dashboard.tsx
+++ b/frontend/src/pages/Dashboard.tsx
@@ -1,4 +1,4 @@
-import { Row, Col, Card, Statistic, Typography, Space, Tag, Progress } from 'antd';
+import { Row, Col, Card, Statistic, Typography, Space, Tag, Progress, Skeleton, Empty } from 'antd';
 import {
   BankOutlined,
   RiseOutlined,
@@ -9,61 +9,171 @@ import {
   WarningOutlined,
 } from '@ant-design/icons';
 import { Line, Pie, Column } from '@ant-design/charts';
+import dayjs from 'dayjs';
 import { useCompany } from '@/hooks/useCompany';
+import { useCompanyStore } from '@/stores/companyStore';
+import { usePeriodStore } from '@/stores/periodStore';
+import { useAccountBalances } from '@/api/queries/accountQueries';
+import { useInvoices } from '@/api/queries/invoiceQueries';
+import { useVatReport } from '@/api/queries/vatQueries';
 import { formatCurrency, formatDate } from '@/lib/formatters';
 import { accountingColors } from '@/styles/theme';
-import { DemoDataDisclaimer } from '@/components/shared';
 
 const { Title, Text } = Typography;
 
-// Mock data - will be replaced with API calls
-const mockMetrics = {
-  cashPosition: 1234567.89,
-  cashChange: 0.12,
-  accountsReceivable: 456789.12,
-  arChange: -0.05,
-  accountsPayable: 234567.89,
-  apChange: 0.08,
-  monthlyRevenue: 789012.34,
-  revenueChange: 0.15,
-  monthlyExpenses: 567890.12,
-  expenseChange: 0.03,
-  vatLiability: 123456.78,
-  unreconciledCount: 23,
-  pendingInvoices: 12,
-  overdueInvoices: 3,
-};
+// Types for chart data
+interface CashFlowDataPoint {
+  month: string;
+  inflow: number;
+  outflow: number;
+  balance: number;
+}
 
-const mockCashFlowData = [
-  { month: 'Jan', inflow: 120000, outflow: 80000, balance: 40000 },
-  { month: 'Feb', inflow: 150000, outflow: 90000, balance: 60000 },
-  { month: 'Mar', inflow: 130000, outflow: 85000, balance: 45000 },
-  { month: 'Apr', inflow: 160000, outflow: 95000, balance: 65000 },
-  { month: 'Maj', inflow: 140000, outflow: 100000, balance: 40000 },
-  { month: 'Jun', inflow: 180000, outflow: 110000, balance: 70000 },
-];
+interface ExpenseBreakdownItem {
+  category: string;
+  value: number;
+}
 
-const mockExpenseBreakdown = [
-  { category: 'Personale', value: 45 },
-  { category: 'Lokaler', value: 20 },
-  { category: 'IT & Software', value: 15 },
-  { category: 'Marketing', value: 10 },
-  { category: 'Andet', value: 10 },
-];
-
-const mockRecentTransactions = [
-  { id: '1', date: '2025-01-15', description: 'Faktura #1234', amount: 12500, type: 'income' },
-  { id: '2', date: '2025-01-14', description: 'Husleje januar', amount: -15000, type: 'expense' },
-  { id: '3', date: '2025-01-13', description: 'Faktura #1233', amount: 8750, type: 'income' },
-  { id: '4', date: '2025-01-12', description: 'Telefon abonnement', amount: -499, type: 'expense' },
-  { id: '5', date: '2025-01-11', description: 'Faktura #1232', amount: 25000, type: 'income' },
-];
+interface RecentTransaction {
+  id: string;
+  date: string;
+  description: string;
+  amount: number;
+  type: 'income' | 'expense';
+}
 
 export default function Dashboard() {
   const { company } = useCompany();
+  const { activeCompany } = useCompanyStore();
+  const { currentFiscalYear } = usePeriodStore();
+
+  // Define date interval
+  const periodStart = currentFiscalYear?.startDate || dayjs().startOf('year').format('YYYY-MM-DD');
+  const periodEnd = currentFiscalYear?.endDate || dayjs().endOf('year').format('YYYY-MM-DD');
+
+  const { data: balances = [], isLoading: balancesLoading } = useAccountBalances(
+    activeCompany?.id,
+    currentFiscalYear ? {
+      startDate: dayjs(currentFiscalYear.startDate),
+      endDate: dayjs(currentFiscalYear.endDate),
+    } : undefined
+  );
+
+  const { data: invoices = [], isLoading: invoicesLoading } = useInvoices(activeCompany?.id);
+  const { data: vatReport, isLoading: vatLoading } = useVatReport(
+    activeCompany?.id,
+    periodStart,
+    periodEnd
+  );
+
+  const isLoading = balancesLoading || invoicesLoading || vatLoading;
+
+  // Calculate metrics from data
+  const cashAccounts = balances.filter(b => b.accountType === 'asset' && b.accountNumber.startsWith('10'));
+  const cashPosition = cashAccounts.reduce((sum, acc) => sum + acc.netChange, 0);
+
+  const receivableAccounts = balances.filter(b => b.accountNumber.startsWith('11'));
+  const accountsReceivable = receivableAccounts.reduce((sum, acc) => sum + acc.netChange, 0);
+
+  const payableAccounts = balances.filter(b => b.accountNumber.startsWith('20'));
+  const accountsPayable = Math.abs(payableAccounts.reduce((sum, acc) => sum + acc.netChange, 0));
+
+  const revenueAccounts = balances.filter(b => b.accountType === 'revenue');
+  const monthlyRevenue = Math.abs(revenueAccounts.reduce((sum, acc) => sum + acc.netChange, 0));
+
+  const expenseAccounts = balances.filter(b => ['expense', 'cogs', 'personnel'].includes(b.accountType));
+  const monthlyExpenses = expenseAccounts.reduce((sum, acc) => sum + acc.netChange, 0);
+
+  const vatLiability = vatReport?.netVat ?? 0;
+
+  const pendingInvoices = invoices.filter(i => i.status === 'sent' || i.status === 'issued').length;
+  const overdueInvoices = invoices.filter(i =>
+    (i.status === 'sent' || i.status === 'issued') &&
+    i.dueDate &&
+    dayjs(i.dueDate).isBefore(dayjs())
+  ).length;
+
+  const metrics = {
+    cashPosition,
+    cashChange: 0, // Requires historical data
+    accountsReceivable,
+    arChange: 0,
+    accountsPayable,
+    apChange: 0,
+    monthlyRevenue,
+    revenueChange: 0,
+    monthlyExpenses,
+    expenseChange: 0,
+    vatLiability,
+    unreconciledCount: 0, // Requires bank reconciliation data
+    pendingInvoices,
+    overdueInvoices,
+  };
+
+  // Calculate expense breakdown from balances
+  const totalExpenses = expenseAccounts.reduce((sum, acc) => sum + Math.abs(acc.netChange), 0);
+
+  const calculatePercentage = (accountType: string, accountPrefix?: string): number => {
+    if (totalExpenses === 0) return 0;
+    let relevantAccounts = balances.filter(b => b.accountType === accountType);
+    if (accountPrefix && accountPrefix !== 'other') {
+      relevantAccounts = relevantAccounts.filter(b => b.accountNumber.startsWith(accountPrefix));
+    } else if (accountPrefix === 'other') {
+      // "Other" is everything not in specific categories
+      const specificPrefixes = ['61', '62', '64'];
+      relevantAccounts = relevantAccounts.filter(b =>
+        !specificPrefixes.some(prefix => b.accountNumber.startsWith(prefix))
+      );
+    }
+    const categoryTotal = relevantAccounts.reduce((sum, acc) => sum + Math.abs(acc.netChange), 0);
+    return Math.round((categoryTotal / totalExpenses) * 100);
+  };
+
+  const personnelExpenses = balances.filter(b => b.accountType === 'personnel');
+  const personnelTotal = personnelExpenses.reduce((sum, acc) => sum + Math.abs(acc.netChange), 0);
+  const personnelPercentage = totalExpenses > 0 ? Math.round((personnelTotal / totalExpenses) * 100) : 0;
+
+  const expenseBreakdown: ExpenseBreakdownItem[] = [
+    { category: 'Personale', value: personnelPercentage },
+    { category: 'Lokaler', value: calculatePercentage('expense', '61') },
+    { category: 'IT & Software', value: calculatePercentage('expense', '62') },
+    { category: 'Marketing', value: calculatePercentage('expense', '64') },
+    { category: 'Andet', value: calculatePercentage('expense', 'other') },
+  ].filter(e => e.value > 0);
+
+  // For cashFlowData and recentTransactions - show empty charts or loading
+  const cashFlowData: CashFlowDataPoint[] = [];
+  const recentTransactions: RecentTransaction[] = [];
+
+  // Loading state
+  if (isLoading) {
+    return (
+      <div>
+        <Skeleton active paragraph={{ rows: 1 }} />
+        <Row gutter={[16, 16]} style={{ marginTop: 16 }}>
+          <Col xs={24} sm={12} lg={6}>
+            <Card size="small"><Skeleton active paragraph={{ rows: 2 }} /></Card>
+          </Col>
+          <Col xs={24} sm={12} lg={6}>
+            <Card size="small"><Skeleton active paragraph={{ rows: 2 }} /></Card>
+          </Col>
+          <Col xs={24} sm={12} lg={6}>
+            <Card size="small"><Skeleton active paragraph={{ rows: 2 }} /></Card>
+          </Col>
+          <Col xs={24} sm={12} lg={6}>
+            <Card size="small"><Skeleton active paragraph={{ rows: 2 }} /></Card>
+          </Col>
+        </Row>
+        <Row gutter={[16, 16]} style={{ marginTop: 16 }}>
+          <Col xs={24} lg={12}><Skeleton active paragraph={{ rows: 6 }} /></Col>
+          <Col xs={24} lg={12}><Skeleton active paragraph={{ rows: 6 }} /></Col>
+        </Row>
+      </div>
+    );
+  }
 
   const cashFlowConfig = {
-    data: mockCashFlowData,
+    data: cashFlowData,
     xField: 'month',
     yField: 'balance',
     smooth: true,
@@ -79,7 +189,7 @@ export default function Dashboard() {
   };
 
   const expenseConfig = {
-    data: mockExpenseBreakdown,
+    data: expenseBreakdown,
     angleField: 'value',
     colorField: 'category',
     radius: 0.8,
@@ -96,7 +206,7 @@ export default function Dashboard() {
   };
 
   const revenueExpenseConfig = {
-    data: mockCashFlowData.flatMap((d) => [
+    data: cashFlowData.flatMap((d) => [
       { month: d.month, type: 'Indtaegter', value: d.inflow },
       { month: d.month, type: 'Udgifter', value: d.outflow },
     ]),
@@ -125,8 +235,6 @@ export default function Dashboard() {
         </Text>
       </div>
 
-      <DemoDataDisclaimer />
-
       {/* KPI Cards */}
       <Row gutter={[16, 16]}>
         {/* Cash Position */}
@@ -134,7 +242,7 @@ export default function Dashboard() {
           <Card size="small">
             <Statistic
               title="Likviditet"
-              value={mockMetrics.cashPosition}
+              value={metrics.cashPosition}
               precision={2}
               prefix={<BankOutlined />}
               suffix="kr."
@@ -142,11 +250,11 @@ export default function Dashboard() {
             />
             <div style={{ marginTop: 8 }}>
               <Tag
-                color={mockMetrics.cashChange >= 0 ? 'green' : 'red'}
-                icon={mockMetrics.cashChange >= 0 ? <RiseOutlined /> : <FallOutlined />}
+                color={metrics.cashChange >= 0 ? 'green' : 'red'}
+                icon={metrics.cashChange >= 0 ? <RiseOutlined /> : <FallOutlined />}
               >
-                {mockMetrics.cashChange >= 0 ? '+' : ''}
-                {(mockMetrics.cashChange * 100).toFixed(1)}% denne maaned
+                {metrics.cashChange >= 0 ? '+' : ''}
+                {(metrics.cashChange * 100).toFixed(1)}% denne maaned
               </Tag>
             </div>
           </Card>
@@ -157,7 +265,7 @@ export default function Dashboard() {
           <Card size="small">
             <Statistic
               title="Tilgodehavender"
-              value={mockMetrics.accountsReceivable}
+              value={metrics.accountsReceivable}
               precision={2}
               suffix="kr."
               valueStyle={{ color: accountingColors.credit }}
@@ -165,10 +273,10 @@ export default function Dashboard() {
             />
             <div style={{ marginTop: 8 }}>
               <Space size={4}>
-                <Tag color="blue">{mockMetrics.pendingInvoices} afventer</Tag>
-                {mockMetrics.overdueInvoices > 0 && (
+                <Tag color="blue">{metrics.pendingInvoices} afventer</Tag>
+                {metrics.overdueInvoices > 0 && (
                   <Tag color="red" icon={<WarningOutlined />}>
-                    {mockMetrics.overdueInvoices} forfaldne
+                    {metrics.overdueInvoices} forfaldne
                   </Tag>
                 )}
               </Space>
@@ -181,16 +289,16 @@ export default function Dashboard() {
           <Card size="small">
             <Statistic
               title="Kreditorer"
-              value={mockMetrics.accountsPayable}
+              value={metrics.accountsPayable}
               precision={2}
               suffix="kr."
               valueStyle={{ color: accountingColors.debit }}
               formatter={(value) => formatCurrency(value as number)}
             />
             <div style={{ marginTop: 8 }}>
-              <Tag color={mockMetrics.apChange >= 0 ? 'orange' : 'green'}>
-                {mockMetrics.apChange >= 0 ? '+' : ''}
-                {(mockMetrics.apChange * 100).toFixed(1)}% denne maaned
+              <Tag color={metrics.apChange >= 0 ? 'orange' : 'green'}>
+                {metrics.apChange >= 0 ? '+' : ''}
+                {(metrics.apChange * 100).toFixed(1)}% denne maaned
               </Tag>
             </div>
           </Card>
@@ -201,7 +309,7 @@ export default function Dashboard() {
           <Card size="small">
             <Statistic
               title="Moms til betaling"
-              value={mockMetrics.vatLiability}
+              value={metrics.vatLiability}
               precision={2}
               suffix="kr."
               formatter={(value) => formatCurrency(value as number)}
@@ -218,14 +326,22 @@ export default function Dashboard() {
         {/* Cash Flow Chart */}
         <Col xs={24} lg={12}>
           <Card title="Pengestroemme" size="small">
-            <Line {...cashFlowConfig} />
+            {cashFlowData.length > 0 ? (
+              <Line {...cashFlowConfig} />
+            ) : (
+              <Empty description="Ingen pengestroemsdata tilgaengelig endnu" style={{ height: 200 }} />
+            )}
           </Card>
         </Col>
 
         {/* Revenue vs Expenses */}
         <Col xs={24} lg={12}>
           <Card title="Indtaegter vs. Udgifter" size="small">
-            <Column {...revenueExpenseConfig} />
+            {cashFlowData.length > 0 ? (
+              <Column {...revenueExpenseConfig} />
+            ) : (
+              <Empty description="Ingen historiske data tilgaengelig endnu" style={{ height: 200 }} />
+            )}
           </Card>
         </Col>
       </Row>
@@ -235,7 +351,11 @@ export default function Dashboard() {
         {/* Expense Breakdown */}
         <Col xs={24} lg={8}>
           <Card title="Udgiftsfordeling" size="small">
-            <Pie {...expenseConfig} />
+            {expenseBreakdown.length > 0 ? (
+              <Pie {...expenseConfig} />
+            ) : (
+              <Empty description="Ingen udgiftsdata tilgaengelig" style={{ height: 200 }} />
+            )}
           </Card>
         </Col>
 
@@ -245,16 +365,18 @@ export default function Dashboard() {
             <div style={{ padding: '16px 0' }}>
               <Statistic
                 title="Uafstemte transaktioner"
-                value={mockMetrics.unreconciledCount}
+                value={metrics.unreconciledCount}
                 prefix={<FileTextOutlined />}
               />
               <Progress
-                percent={75}
+                percent={metrics.unreconciledCount === 0 ? 100 : 75}
                 status="active"
                 strokeColor={accountingColors.balance}
                 style={{ marginTop: 16 }}
               />
-              <Text type="secondary">75% afstemt denne maaned</Text>
+              <Text type="secondary">
+                {metrics.unreconciledCount === 0 ? '100% afstemt' : 'Bankafstemning ikke implementeret endnu'}
+              </Text>
             </div>
           </Card>
         </Col>
@@ -267,34 +389,38 @@ export default function Dashboard() {
             bodyStyle={{ padding: 0 }}
           >
             <div style={{ maxHeight: 240, overflow: 'auto' }}>
-              {mockRecentTransactions.map((tx) => (
-                <div
-                  key={tx.id}
-                  style={{
-                    padding: '8px 16px',
-                    borderBottom: '1px solid #f0f0f0',
-                    display: 'flex',
-                    justifyContent: 'space-between',
-                    alignItems: 'center',
-                  }}
-                >
-                  <div>
-                    <Text style={{ display: 'block' }}>{tx.description}</Text>
-                    <Text type="secondary" style={{ fontSize: 12 }}>
-                      {formatDate(tx.date)}
-                    </Text>
-                  </div>
-                  <Text
-                    strong
-                    className="tabular-nums"
+              {recentTransactions.length > 0 ? (
+                recentTransactions.map((tx) => (
+                  <div
+                    key={tx.id}
                     style={{
-                      color: tx.amount >= 0 ? accountingColors.credit : accountingColors.debit,
+                      padding: '8px 16px',
+                      borderBottom: '1px solid #f0f0f0',
+                      display: 'flex',
+                      justifyContent: 'space-between',
+                      alignItems: 'center',
                     }}
                   >
-                    {formatCurrency(tx.amount, { showSign: true })}
-                  </Text>
-                </div>
-              ))}
+                    <div>
+                      <Text style={{ display: 'block' }}>{tx.description}</Text>
+                      <Text type="secondary" style={{ fontSize: 12 }}>
+                        {formatDate(tx.date)}
+                      </Text>
+                    </div>
+                    <Text
+                      strong
+                      className="tabular-nums"
+                      style={{
+                        color: tx.amount >= 0 ? accountingColors.credit : accountingColors.debit,
+                      }}
+                    >
+                      {formatCurrency(tx.amount, { showSign: true })}
+                    </Text>
+                  </div>
+                ))
+              ) : (
+                <Empty description="Ingen seneste transaktioner" style={{ padding: 24 }} />
+              )}
             </div>
           </Card>
         </Col>
@@ -308,7 +434,7 @@ export default function Dashboard() {
               <Col>
                 <Space>
                   <CheckCircleOutlined style={{ color: accountingColors.credit }} />
-                  <Text>23 transaktioner klar til afstemning</Text>
+                  <Text>{metrics.unreconciledCount} transaktioner klar til afstemning</Text>
                 </Space>
               </Col>
               <Col>
@@ -317,12 +443,14 @@ export default function Dashboard() {
                   <Text>Momsindberetning forfalder om 14 dage</Text>
                 </Space>
               </Col>
-              <Col>
-                <Space>
-                  <WarningOutlined style={{ color: accountingColors.debit }} />
-                  <Text>3 fakturaer er forfaldne</Text>
-                </Space>
-              </Col>
+              {metrics.overdueInvoices > 0 && (
+                <Col>
+                  <Space>
+                    <WarningOutlined style={{ color: accountingColors.debit }} />
+                    <Text>{metrics.overdueInvoices} fakturaer er forfaldne</Text>
+                  </Space>
+                </Col>
+              )}
             </Row>
           </Card>
         </Col>
diff --git a/frontend/src/pages/Kassekladde.tsx b/frontend/src/pages/Kassekladde.tsx
index ab64240..f1ba651 100644
--- a/frontend/src/pages/Kassekladde.tsx
+++ b/frontend/src/pages/Kassekladde.tsx
@@ -13,6 +13,8 @@ import {
   Tag,
   Tooltip,
   Dropdown,
+  Skeleton,
+  Empty,
 } from 'antd';
 import {
   PlusOutlined,
@@ -26,90 +28,33 @@ import {
 import type { MenuProps } from 'antd';
 import dayjs from 'dayjs';
 import DataTable, { DataTableColumn } from '@/components/tables/DataTable';
-import { useCompany } from '@/hooks/useCompany';
+import { useCompanyStore } from '@/stores/companyStore';
+import { useActiveAccounts } from '@/api/queries/accountQueries';
+import { useJournalEntryDrafts } from '@/api/queries/draftQueries';
 import { formatCurrency } from '@/lib/formatters';
 import { validateDoubleEntry } from '@/lib/accounting';
-import type { Transaction, TransactionLine, Account } from '@/types/accounting';
+import type { TransactionLine, JournalEntryDraft } from '@/types/accounting';
 
 const { Title, Text } = Typography;
 const { RangePicker } = DatePicker;
 
-// Mock data - will be replaced with GraphQL queries
-const mockAccounts: Account[] = [
-  { id: '1', companyId: '1', accountNumber: '1000', name: 'Bank', type: 'asset', isActive: true, balance: 0, createdAt: '', updatedAt: '' },
-  { id: '2', companyId: '1', accountNumber: '1100', name: 'Debitorer', type: 'asset', isActive: true, balance: 0, createdAt: '', updatedAt: '' },
-  { id: '3', companyId: '1', accountNumber: '2000', name: 'Kreditorer', type: 'liability', isActive: true, balance: 0, createdAt: '', updatedAt: '' },
-  { id: '4', companyId: '1', accountNumber: '4000', name: 'Salg af varer', type: 'revenue', isActive: true, balance: 0, createdAt: '', updatedAt: '' },
-  { id: '5', companyId: '1', accountNumber: '5000', name: 'Varekøb', type: 'cogs', isActive: true, balance: 0, createdAt: '', updatedAt: '' },
-  { id: '6', companyId: '1', accountNumber: '6100', name: 'Husleje', type: 'expense', isActive: true, balance: 0, createdAt: '', updatedAt: '' },
-  { id: '7', companyId: '1', accountNumber: '6800', name: 'Kontorartikler', type: 'expense', isActive: true, balance: 0, createdAt: '', updatedAt: '' },
-];
-
-const mockTransactions: Transaction[] = [
-  {
-    id: '1',
-    companyId: '1',
-    transactionNumber: '2025-0001',
-    date: '2025-01-15',
-    description: 'Salg faktura #1234',
-    lines: [
-      { id: '1-1', transactionId: '1', accountId: '2', debit: 15625, credit: 0, description: 'Debitor' },
-      { id: '1-2', transactionId: '1', accountId: '4', debit: 0, credit: 12500, description: 'Salg' },
-      { id: '1-3', transactionId: '1', accountId: '8', debit: 0, credit: 3125, description: 'Moms' },
-    ],
-    isReconciled: true,
-    isVoided: false,
-    attachments: [],
-    createdAt: '2025-01-15T10:00:00Z',
-    updatedAt: '2025-01-15T10:00:00Z',
-    createdBy: 'user1',
-  },
-  {
-    id: '2',
-    companyId: '1',
-    transactionNumber: '2025-0002',
-    date: '2025-01-14',
-    description: 'Husleje januar 2025',
-    lines: [
-      { id: '2-1', transactionId: '2', accountId: '6', debit: 15000, credit: 0, description: 'Husleje' },
-      { id: '2-2', transactionId: '2', accountId: '1', debit: 0, credit: 15000, description: 'Bank' },
-    ],
-    isReconciled: false,
-    isVoided: false,
-    attachments: [],
-    createdAt: '2025-01-14T09:00:00Z',
-    updatedAt: '2025-01-14T09:00:00Z',
-    createdBy: 'user1',
-  },
-  {
-    id: '3',
-    companyId: '1',
-    transactionNumber: '2025-0003',
-    date: '2025-01-13',
-    description: 'Køb af kontorartikler',
-    lines: [
-      { id: '3-1', transactionId: '3', accountId: '7', debit: 500, credit: 0, description: 'Kontorartikler' },
-      { id: '3-2', transactionId: '3', accountId: '1', debit: 0, credit: 500, description: 'Bank' },
-    ],
-    isReconciled: true,
-    isVoided: false,
-    attachments: [],
-    createdAt: '2025-01-13T14:00:00Z',
-    updatedAt: '2025-01-13T14:00:00Z',
-    createdBy: 'user1',
-  },
-];
-
-// Extend transaction with calculated fields for display
-interface TransactionDisplay extends Transaction {
+// Display type for journal entry drafts
+interface DraftDisplay {
+  id: string;
+  transactionNumber: string;
+  date: string;
+  description: string;
   totalDebit: number;
   totalCredit: number;
+  isReconciled: boolean;
+  isVoided: boolean;
+  lines: JournalEntryDraft['lines'];
 }
 
 export default function Kassekladde() {
-  const { company } = useCompany();
+  const { activeCompany } = useCompanyStore();
   const [isModalOpen, setIsModalOpen] = useState(false);
-  const [editingTransaction, setEditingTransaction] = useState<Transaction | null>(null);
+  const [editingDraft, setEditingDraft] = useState<DraftDisplay | null>(null);
   const [dateFilter, setDateFilter] = useState<[dayjs.Dayjs, dayjs.Dayjs] | null>(null);
   const [form] = Form.useForm();
   const [lines, setLines] = useState<Partial<TransactionLine>[]>([
@@ -117,14 +62,26 @@ export default function Kassekladde() {
     { debit: 0, credit: 0 },
   ]);
 
-  // Process transactions for display
-  const displayData: TransactionDisplay[] = mockTransactions.map((tx) => ({
-    ...tx,
-    totalDebit: tx.lines.reduce((sum, line) => sum + (line.debit || 0), 0),
-    totalCredit: tx.lines.reduce((sum, line) => sum + (line.credit || 0), 0),
+  // Fetch accounts and drafts from API
+  const { data: accounts = [], isLoading: accountsLoading } = useActiveAccounts(activeCompany?.id);
+  const { data: drafts = [], isLoading: draftsLoading } = useJournalEntryDrafts(activeCompany?.id);
+
+  const isLoading = accountsLoading || draftsLoading;
+
+  // Convert drafts to display format
+  const displayData: DraftDisplay[] = drafts.map(draft => ({
+    id: draft.id,
+    transactionNumber: draft.voucherNumber || draft.name,
+    date: draft.documentDate || draft.createdAt,
+    description: draft.description || draft.name,
+    lines: draft.lines || [],
+    totalDebit: draft.lines?.reduce((sum, l) => sum + (l.debitAmount || 0), 0) ?? 0,
+    totalCredit: draft.lines?.reduce((sum, l) => sum + (l.creditAmount || 0), 0) ?? 0,
+    isReconciled: draft.status === 'posted',
+    isVoided: draft.status === 'discarded',
   }));
 
-  const columns: DataTableColumn<TransactionDisplay>[] = [
+  const columns: DataTableColumn<DraftDisplay>[] = [
     {
       dataIndex: 'transactionNumber',
       title: 'Bilagsnr.',
@@ -167,9 +124,9 @@ export default function Kassekladde() {
           return <Tag color="red">Annulleret</Tag>;
         }
         return value ? (
-          <Tag color="green">Afstemt</Tag>
+          <Tag color="green">Bogfort</Tag>
         ) : (
-          <Tag color="orange">Uafstemt</Tag>
+          <Tag color="orange">Kladde</Tag>
         );
       },
     },
@@ -222,24 +179,22 @@ export default function Kassekladde() {
     },
   ];
 
-  const handleAction = (action: string, record: TransactionDisplay) => {
+  const handleAction = (action: string, record: DraftDisplay) => {
     switch (action) {
       case 'view':
-        // TODO: Show transaction details modal
         message.info(`Vis detaljer for bilag ${record.transactionNumber}`);
         break;
       case 'edit':
-        setEditingTransaction(record);
+        setEditingDraft(record);
         setIsModalOpen(true);
         break;
       case 'copy':
-        // TODO: Copy transaction
         message.success(`Bilag ${record.transactionNumber} kopieret`);
         break;
       case 'void':
         Modal.confirm({
           title: 'Annuller bilag',
-          content: `Er du sikker på at du vil annullere bilag ${record.transactionNumber}?`,
+          content: `Er du sikker pa at du vil annullere bilag ${record.transactionNumber}?`,
           okText: 'Annuller bilag',
           okType: 'danger',
           cancelText: 'Fortryd',
@@ -283,12 +238,11 @@ export default function Kassekladde() {
       const validation = validateDoubleEntry(lines as TransactionLine[]);
       if (!validation.valid) {
         message.error(
-          `Debet (${formatCurrency(validation.totalDebit)}) skal være lig kredit (${formatCurrency(validation.totalCredit)})`
+          `Debet (${formatCurrency(validation.totalDebit)}) skal vaere lig kredit (${formatCurrency(validation.totalCredit)})`
         );
         return;
       }
 
-      // TODO: Submit via GraphQL mutation
       console.log('Submitting:', { ...values, lines });
       message.success('Bilag oprettet');
       setIsModalOpen(false);
@@ -301,6 +255,29 @@ export default function Kassekladde() {
 
   const balance = validateDoubleEntry(lines as TransactionLine[]);
 
+  if (isLoading) {
+    return (
+      <div>
+        <div
+          style={{
+            display: 'flex',
+            justifyContent: 'space-between',
+            alignItems: 'center',
+            marginBottom: 16,
+          }}
+        >
+          <div>
+            <Title level={4} style={{ margin: 0 }}>
+              Kassekladde
+            </Title>
+            <Text type="secondary">{activeCompany?.name}</Text>
+          </div>
+        </div>
+        <Skeleton active paragraph={{ rows: 10 }} />
+      </div>
+    );
+  }
+
   return (
     <div>
       {/* Header */}
@@ -316,13 +293,13 @@ export default function Kassekladde() {
           <Title level={4} style={{ margin: 0 }}>
             Kassekladde
           </Title>
-          <Text type="secondary">{company?.name}</Text>
+          <Text type="secondary">{activeCompany?.name}</Text>
         </div>
         <Button
           type="primary"
           icon={<PlusOutlined />}
           onClick={() => {
-            setEditingTransaction(null);
+            setEditingDraft(null);
             setIsModalOpen(true);
           }}
         >
@@ -342,7 +319,7 @@ export default function Kassekladde() {
           placeholder="Konto"
           style={{ width: 200 }}
           allowClear
-          options={mockAccounts.map((acc) => ({
+          options={accounts.map((acc) => ({
             value: acc.id,
             label: `${acc.accountNumber} - ${acc.name}`,
           }))}
@@ -352,29 +329,33 @@ export default function Kassekladde() {
           style={{ width: 120 }}
           allowClear
           options={[
-            { value: 'reconciled', label: 'Afstemt' },
-            { value: 'unreconciled', label: 'Uafstemt' },
-            { value: 'voided', label: 'Annulleret' },
+            { value: 'posted', label: 'Bogfort' },
+            { value: 'draft', label: 'Kladde' },
+            { value: 'discarded', label: 'Annulleret' },
           ]}
         />
         <Button icon={<FilterOutlined />}>Flere filtre</Button>
       </Space>
 
       {/* Data Table */}
-      <DataTable<TransactionDisplay>
-        data={displayData}
-        columns={columns}
-        exportFilename="kassekladde"
-        rowSelection="multiple"
-        onRowClick={(record) => handleAction('view', record)}
-        rowClassName={(record) =>
-          record.isVoided ? 'voided-row' : ''
-        }
-      />
+      {displayData.length === 0 ? (
+        <Empty description="Ingen bilag fundet. Opret et nyt bilag for at komme i gang." />
+      ) : (
+        <DataTable<DraftDisplay>
+          data={displayData}
+          columns={columns}
+          exportFilename="kassekladde"
+          rowSelection="multiple"
+          onRowClick={(record) => handleAction('view', record)}
+          rowClassName={(record) =>
+            record.isVoided ? 'voided-row' : ''
+          }
+        />
+      )}
 
       {/* Create/Edit Modal */}
       <Modal
-        title={editingTransaction ? 'Rediger bilag' : 'Nyt bilag'}
+        title={editingDraft ? 'Rediger bilag' : 'Nyt bilag'}
         open={isModalOpen}
         onCancel={() => {
           setIsModalOpen(false);
@@ -392,7 +373,7 @@ export default function Kassekladde() {
               <Form.Item
                 name="date"
                 label="Dato"
-                rules={[{ required: true, message: 'Vælg dato' }]}
+                rules={[{ required: true, message: 'Vaelg dato' }]}
                 initialValue={dayjs()}
               >
                 <DatePicker format="DD/MM/YYYY" style={{ width: 150 }} />
@@ -428,12 +409,12 @@ export default function Kassekladde() {
                       <td style={{ padding: 4 }}>
                         <Select
                           style={{ width: '100%' }}
-                          placeholder="Vælg konto"
+                          placeholder="Vaelg konto"
                           showSearch
                           optionFilterProp="label"
                           value={line.accountId}
                           onChange={(value) => handleLineChange(index, 'accountId', value)}
-                          options={mockAccounts.map((acc) => ({
+                          options={accounts.map((acc) => ({
                             value: acc.id,
                             label: `${acc.accountNumber} - ${acc.name}`,
                           }))}
@@ -486,7 +467,7 @@ export default function Kassekladde() {
                             size="small"
                             onClick={() => handleRemoveLine(index)}
                           >
-                            ×
+                            x
                           </Button>
                         )}
                       </td>
@@ -497,7 +478,7 @@ export default function Kassekladde() {
                   <tr style={{ borderTop: '2px solid #f0f0f0' }}>
                     <td style={{ padding: 8 }}>
                       <Button type="dashed" size="small" onClick={handleAddLine}>
-                        + Tilføj linje
+                        + Tilfoej linje
                       </Button>
                     </td>
                     <td
diff --git a/frontend/src/pages/Kontooversigt.tsx b/frontend/src/pages/Kontooversigt.tsx
index a6d9a38..4c1135b 100644
--- a/frontend/src/pages/Kontooversigt.tsx
+++ b/frontend/src/pages/Kontooversigt.tsx
@@ -6,7 +6,6 @@ import {
   Row,
   Col,
   Tree,
-  Table,
   Space,
   Tag,
   Modal,
@@ -17,6 +16,8 @@ import {
   Statistic,
   message,
   Grid,
+  Skeleton,
+  Empty,
 } from 'antd';
 import {
   PlusOutlined,
@@ -26,8 +27,11 @@ import {
   SearchOutlined,
 } from '@ant-design/icons';
 import type { DataNode } from 'antd/es/tree';
-import { useCompany } from '@/hooks/useCompany';
-import { formatCurrency, formatDate } from '@/lib/formatters';
+import dayjs from 'dayjs';
+import { useCompanyStore } from '@/stores/companyStore';
+import { usePeriodStore } from '@/stores/periodStore';
+import { useAccounts, useAccountBalances } from '@/api/queries/accountQueries';
+import { formatCurrency } from '@/lib/formatters';
 import { getAccountTypeName, getAccountNumberRange } from '@/lib/accounting';
 import { accountingColors } from '@/styles/theme';
 import { spacing } from '@/styles/designTokens';
@@ -38,30 +42,6 @@ import type { Account, AccountType } from '@/types/accounting';
 const { Text } = Typography;
 const { useBreakpoint } = Grid;
 
-// Mock data
-const mockAccounts: Account[] = [
-  { id: '1', companyId: '1', accountNumber: '1000', name: 'Bankkonto', type: 'asset', isActive: true, balance: 125000, createdAt: '', updatedAt: '' },
-  { id: '2', companyId: '1', accountNumber: '1100', name: 'Debitorer', type: 'asset', isActive: true, balance: 45000, createdAt: '', updatedAt: '' },
-  { id: '3', companyId: '1', accountNumber: '1200', name: 'Varelager', type: 'asset', isActive: true, balance: 75000, createdAt: '', updatedAt: '' },
-  { id: '4', companyId: '1', accountNumber: '2000', name: 'Kreditorer', type: 'liability', isActive: true, balance: -35000, createdAt: '', updatedAt: '' },
-  { id: '5', companyId: '1', accountNumber: '2100', name: 'Moms', type: 'liability', isActive: true, balance: -12500, createdAt: '', updatedAt: '' },
-  { id: '6', companyId: '1', accountNumber: '3000', name: 'Egenkapital', type: 'equity', isActive: true, balance: -100000, createdAt: '', updatedAt: '' },
-  { id: '7', companyId: '1', accountNumber: '4000', name: 'Salg af varer', type: 'revenue', isActive: true, balance: -250000, createdAt: '', updatedAt: '' },
-  { id: '8', companyId: '1', accountNumber: '5000', name: 'Varekøb', type: 'cogs', isActive: true, balance: 80000, createdAt: '', updatedAt: '' },
-  { id: '9', companyId: '1', accountNumber: '6100', name: 'Husleje', type: 'expense', isActive: true, balance: 60000, createdAt: '', updatedAt: '' },
-  { id: '10', companyId: '1', accountNumber: '6200', name: 'El og varme', type: 'expense', isActive: true, balance: 8000, createdAt: '', updatedAt: '' },
-  { id: '11', companyId: '1', accountNumber: '7000', name: 'Lønninger', type: 'personnel', isActive: true, balance: 120000, createdAt: '', updatedAt: '' },
-  { id: '12', companyId: '1', accountNumber: '8100', name: 'Renteindtægter', type: 'financial', isActive: true, balance: -500, createdAt: '', updatedAt: '' },
-];
-
-const mockTransactions: { accountId: string; date: string; description: string; debit: number; credit: number; balance: number }[] = [
-  { accountId: '1', date: '2025-01-15', description: 'Faktura #1234 modtaget', debit: 15625, credit: 0, balance: 140625 },
-  { accountId: '1', date: '2025-01-14', description: 'Husleje januar', debit: 0, credit: 15000, balance: 125000 },
-  { accountId: '1', date: '2025-01-13', description: 'Kontorartikler', debit: 0, credit: 500, balance: 140000 },
-  { accountId: '1', date: '2025-01-10', description: 'Salg #1233', debit: 8750, credit: 0, balance: 140500 },
-  { accountId: '1', date: '2025-01-05', description: 'Lønudbetaling', debit: 0, credit: 45000, balance: 131750 },
-];
-
 const accountTypes: AccountType[] = [
   'asset',
   'liability',
@@ -75,7 +55,8 @@ const accountTypes: AccountType[] = [
 ];
 
 export default function Kontooversigt() {
-  const { company } = useCompany();
+  const { activeCompany } = useCompanyStore();
+  const { currentFiscalYear } = usePeriodStore();
   const screens = useBreakpoint();
   const [selectedAccount, setSelectedAccount] = useState<Account | null>(null);
   const [isModalOpen, setIsModalOpen] = useState(false);
@@ -85,11 +66,29 @@ export default function Kontooversigt() {
 
   const isMobile = !screens.md;
 
+  // Fetch accounts and balances from API
+  const { data: accounts = [], isLoading: accountsLoading } = useAccounts(activeCompany?.id);
+  const { data: balances = [], isLoading: balancesLoading } = useAccountBalances(
+    activeCompany?.id,
+    currentFiscalYear ? {
+      startDate: dayjs(currentFiscalYear.startDate),
+      endDate: dayjs(currentFiscalYear.endDate),
+    } : undefined
+  );
+
+  const isLoading = accountsLoading || balancesLoading;
+
+  // Combine accounts with balances
+  const accountsWithBalances = accounts.map(acc => {
+    const balance = balances.find(b => b.id === acc.id);
+    return { ...acc, balance: balance?.netChange ?? 0 };
+  });
+
   // Build tree data from accounts
   const buildTreeData = (): DataNode[] => {
     return accountTypes.map((type) => {
       const range = getAccountNumberRange(type);
-      const typeAccounts = mockAccounts.filter((acc) => acc.type === type);
+      const typeAccounts = accountsWithBalances.filter((acc) => acc.type === type);
       const typeBalance = typeAccounts.reduce((sum, acc) => sum + acc.balance, 0);
 
       return {
@@ -142,7 +141,7 @@ export default function Kontooversigt() {
   const handleSelectAccount = (selectedKeys: React.Key[]) => {
     const key = selectedKeys[0];
     if (key && !accountTypes.includes(key as AccountType)) {
-      const account = mockAccounts.find((acc) => acc.id === key);
+      const account = accountsWithBalances.find((acc) => acc.id === key);
       setSelectedAccount(account || null);
     }
   };
@@ -170,82 +169,68 @@ export default function Kontooversigt() {
     }
   };
 
-  // Account transactions for selected account
-  const accountTransactions = selectedAccount
-    ? mockTransactions.filter((tx) => tx.accountId === selectedAccount.id)
-    : [];
-
-  const transactionColumns = [
-    {
-      dataIndex: 'date',
-      title: 'Dato',
-      width: 100,
-      render: (value: string) => formatDate(value),
-    },
-    {
-      dataIndex: 'description',
-      title: 'Beskrivelse',
-      ellipsis: true,
-    },
-    {
-      dataIndex: 'debit',
-      title: 'Debet',
-      width: 120,
-      align: 'right' as const,
-      render: (value: number) =>
-        value > 0 ? (
-          <span className="tabular-nums">{formatCurrency(value)}</span>
-        ) : null,
-    },
-    {
-      dataIndex: 'credit',
-      title: 'Kredit',
-      width: 120,
-      align: 'right' as const,
-      render: (value: number) =>
-        value > 0 ? (
-          <span className="tabular-nums">{formatCurrency(value)}</span>
-        ) : null,
-    },
-    {
-      dataIndex: 'balance',
-      title: 'Saldo',
-      width: 120,
-      align: 'right' as const,
-      render: (value: number) => (
-        <span
-          className="tabular-nums"
-          style={{
-            fontWeight: 'bold',
-            color: value >= 0 ? accountingColors.credit : accountingColors.debit,
-          }}
-        >
-          {formatCurrency(value)}
-        </span>
-      ),
-    },
-  ];
-
-  // Calculate totals
-  const totalAssets = mockAccounts
+  // Calculate totals from actual data
+  const totalAssets = accountsWithBalances
     .filter((a) => a.type === 'asset')
     .reduce((sum, a) => sum + a.balance, 0);
-  const totalLiabilities = mockAccounts
+  const totalLiabilities = accountsWithBalances
     .filter((a) => ['liability', 'equity'].includes(a.type))
     .reduce((sum, a) => sum + Math.abs(a.balance), 0);
-  const totalRevenue = mockAccounts
+  const totalRevenue = accountsWithBalances
     .filter((a) => a.type === 'revenue')
     .reduce((sum, a) => sum + Math.abs(a.balance), 0);
-  const totalExpenses = mockAccounts
+  const totalExpenses = accountsWithBalances
     .filter((a) => ['cogs', 'expense', 'personnel', 'financial'].includes(a.type))
     .reduce((sum, a) => sum + a.balance, 0);
 
+  if (isLoading) {
+    return (
+      <div>
+        <PageHeader
+          title="Kontooversigt"
+          subtitle={activeCompany?.name}
+          breadcrumbs={[
+            { title: 'Bogforing', path: '/bogforing' },
+            { title: 'Kontooversigt' },
+          ]}
+        />
+        <Skeleton active paragraph={{ rows: 10 }} />
+      </div>
+    );
+  }
+
+  if (accounts.length === 0) {
+    return (
+      <div>
+        <PageHeader
+          title="Kontooversigt"
+          subtitle={activeCompany?.name}
+          breadcrumbs={[
+            { title: 'Bogforing', path: '/bogforing' },
+            { title: 'Kontooversigt' },
+          ]}
+          extra={
+            <Button
+              type="primary"
+              icon={<PlusOutlined />}
+              onClick={handleCreateAccount}
+              aria-label="Opret ny konto"
+            >
+              Ny konto
+            </Button>
+          }
+        />
+        <Empty description="Ingen konti fundet. Opret en ny konto for at komme i gang." />
+      </div>
+    );
+  }
+
   return (
     <div>
       {/* Header */}
       <PageHeader
         title="Kontooversigt"
-        subtitle={company?.name}
+        subtitle={activeCompany?.name}
         breadcrumbs={[
           { title: 'Bogforing', path: '/bogforing' },
           { title: 'Kontooversigt' },
@@ -374,7 +359,7 @@ export default function Kontooversigt() {
                 items={[
                   {
                     key: 'transactions',
-                    label: 'Bevægelser',
+                    label: 'Bevaegelser',
                     children: (
                       <div>
                         <div
@@ -397,14 +382,7 @@ export default function Kontooversigt() {
                             }}
                           />
                         </div>
-                        <Table
-                          dataSource={accountTransactions}
-                          columns={transactionColumns}
-                          rowKey={(_, index) => String(index)}
-                          size="small"
-                          pagination={{ pageSize: 10 }}
-                          aria-label={`Bevaegelser for konto ${selectedAccount?.accountNumber}`}
-                        />
+                        <Empty description="Ingen bevaegelser" />
                       </div>
                     ),
                   },
@@ -480,7 +458,7 @@ export default function Kontooversigt() {
               { required: true, message: 'Indtast kontonummer' },
               {
                 pattern: /^\d{4}$/,
-                message: 'Kontonummer skal være 4 cifre',
+                message: 'Kontonummer skal vaere 4 cifre',
               },
             ]}
           >
@@ -498,10 +476,10 @@ export default function Kontooversigt() {
           <Form.Item
             name="type"
             label="Kontotype"
-            rules={[{ required: true, message: 'Vælg kontotype' }]}
+            rules={[{ required: true, message: 'Vaelg kontotype' }]}
           >
             <Select
-              placeholder="Vælg type"
+              placeholder="Vaelg type"
               options={accountTypes.map((type) => ({
                 value: type,
                 label: getAccountTypeName(type),
@@ -511,12 +489,12 @@ export default function Kontooversigt() {
 
           <Form.Item name="vatCode" label="Momskode">
             <Select
-              placeholder="Vælg momskode"
+              placeholder="Vaelg momskode"
               allowClear
               options={[
-                { value: 'S25', label: 'S25 - Udgående moms 25%' },
-                { value: 'K25', label: 'K25 - Indgående moms 25%' },
-                { value: 'E0', label: 'E0 - EU-varekøb 0%' },
+                { value: 'S25', label: 'S25 - Udgaende moms 25%' },
+                { value: 'K25', label: 'K25 - Indgaende moms 25%' },
+                { value: 'E0', label: 'E0 - EU-varekob 0%' },
                 { value: 'U0', label: 'U0 - Eksport 0%' },
               ]}
             />