diff --git a/src/data/store.ts b/src/data/store.ts
new file mode 100644
index 0000000..f840b0a
--- /dev/null
+++ b/src/data/store.ts
@@ -0,0 +1,41 @@
+import type { Account, Transaction } from '../types';
+
+// Temporary in-memory store for development
+export const accounts: Account[] = [
+    {
+        id: '1',
+        name: 'Checking Account',
+        last4: '4321',
+        balance: 2500.00
+    },
+    {
+        id: '2',
+        name: 'Savings Account',
+        last4: '8765',
+        balance: 10000.00
+    }
+];
+
+export const transactions: Transaction[] = [
+    {
+        id: '1',
+        accountId: '1',
+        date: '2025-04-20',
+        description: 'Grocery Store',
+        amount: -75.50
+    },
+    {
+        id: '2',
+        accountId: '1',
+        date: '2025-04-21',
+        description: 'Salary Deposit',
+        amount: 3000.00
+    },
+    {
+        id: '3',
+        accountId: '2',
+        date: '2025-04-22',
+        description: 'Transfer to Savings',
+        amount: 500.00
+    }
+];
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