diff --git a/server/db.js b/server/db.js
index 74b866d..27e7fd6 100644
--- a/server/db.js
+++ b/server/db.js
@@ -202,6 +202,7 @@ const initDb = async () => {
       CREATE TABLE IF NOT EXISTS payments (
         id VARCHAR(36) PRIMARY KEY,
         family_id VARCHAR(36) NOT NULL,
+        extraordinary_expense_id VARCHAR(36) NULL,
         amount DECIMAL(10, 2) NOT NULL,
         date_paid ${TIMESTAMP_TYPE} NOT NULL,
         for_month INT NOT NULL,
@@ -212,6 +213,23 @@ const initDb = async () => {
       )
     `);
 
+    // Migration for payments: Add extraordinary_expense_id
+    try {
+        let hasExtraId = false;
+        if (DB_CLIENT === 'postgres') {
+            const [cols] = await connection.query("SELECT column_name FROM information_schema.columns WHERE table_name='payments'");
+            hasExtraId = cols.some(c => c.column_name === 'extraordinary_expense_id');
+        } else {
+            const [cols] = await connection.query("SHOW COLUMNS FROM payments");
+            hasExtraId = cols.some(c => c.Field === 'extraordinary_expense_id');
+        }
+
+        if (!hasExtraId) {
+            console.log('Migrating: Adding extraordinary_expense_id to payments...');
+            await connection.query("ALTER TABLE payments ADD COLUMN extraordinary_expense_id VARCHAR(36) NULL");
+        }
+    } catch(e) { console.warn("Payments migration warning:", e.message); }
+
     // 4. Users Table
     await connection.query(`
       CREATE TABLE IF NOT EXISTS users (