diff --git a/savebank.php b/savebank.php
new file mode 100644
index 0000000..1dc5e57
--- /dev/null
+++ b/savebank.php
@@ -0,0 +1,35 @@
+<?php
+// save_bank.php
+session_start();
+include "koneksi.php";
+
+// Pastikan user sudah login
+if (!isset($_SESSION['user_id'])) {
+    die("Not logged in");
+}
+
+$user_id = $_SESSION['user_id'];
+$amount = intval($_POST['amount']); // jumlah top up / perubahan saldo
+
+// Ambil saldo awal dari database
+$sql = "SELECT bank FROM users WHERE id = ?";
+$stmt = mysqli_prepare($conn, $sql);
+mysqli_stmt_bind_param($stmt, "i", $user_id);
+mysqli_stmt_execute($stmt);
+$result = mysqli_stmt_get_result($stmt);
+$user = mysqli_fetch_assoc($result);
+
+$current_bank = intval($user['bank']);
+$new_bank = $current_bank + $amount;
+
+// Update saldo ke database
+$update_sql = "UPDATE users SET bank = ? WHERE id = ?";
+$update_stmt = mysqli_prepare($conn, $update_sql);
+mysqli_stmt_bind_param($update_stmt, "ii", $new_bank, $user_id);
+mysqli_stmt_execute($update_stmt);
+
+// Update session biar realtime
+$_SESSION['bank'] = $new_bank;
+
+// Kirim respon
+echo "SUCCESS:".$new_bank;