# Refill your AI Gateway credits automatically

> Turn on automatic top-up, and AI Gateway refills your balance from your saved card when it runs low.

- Date: 2026-10-15
- Shipped by: Ben Chan and mohamed
- Products: AI Gateway
- URL: https://ngrok.com/changelog/ai-gateway-automatic-top-up

An empty balance stops your requests. That's an awkward thing to find out at 2 a.m. Turn on automatic top-up, and the gateway refills your balance from your saved card when it runs low.

You choose the balance that starts a top-up (at least $5) and the balance to top up to (up to $500). You can also cap how much it spends in each billing period.

## Get started

1. Open [**Billing**](https://app.ngrok.ai/billing) and confirm you have a saved card.
2. Select **Enable auto top-up**, then turn on **Enable auto top-up** in the dialog.
3. Set **When your balance reaches** and **Top up to**.
4. Optional: select **Set a spending limit** and enter a **Maximum spend every billing period**.
5. Select **Save changes**. See [automatic top-up](https://ngrok.com/docs/ai-gateway/concepts/credits#automatic-top-up).