# Billing

> Manage your subscription and check the AI credits that come with your plan.

This page shows you where to manage your Proferex subscription, and how to check the AI credits that come with it.

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## Manage your subscription

Click your name at the bottom of the sidebar and choose **Billing**.

![The menu under your name at the bottom of the sidebar, showing your AI credits, and Home, Account, Billing, and Log out](/images/docs/account-user-menu.jpg "Billing is in the menu under your name")

Proferex opens your billing page at our payment provider, Stripe. There you can:

- Update your card or other payment method.
- See and download your invoices.
- Change or cancel your subscription.

For our plans and prices, see [Pricing](/#pricing).

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## AI credits

AI credits pay for the [Tracker Agent](/docs/ai-assistant/agent-chat/index.md). Each reply uses credits for the work it does: a quick answer costs a little, and longer research costs more.

Your plan adds credits every month, including on yearly plans. Credits you don't use don't carry over.

To see your balance, click your name at the bottom of the sidebar. The menu shows your credits. For more detail, choose **Account** and open the **AI Credits** tab.

![The AI Credits tab of the Account page, showing 1,000 AI credits remaining](/images/docs/account-ai-credits.jpg "Account → AI Credits")

When your balance reaches zero, the Tracker Agent pauses until your next monthly refill. [Contact us](/docs/appendix/contact/index.md) if you need it sooner.

> **Note:** AI credits need an active plan. If your plan has ended, reactivate it on your billing page to use the Tracker Agent again.

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## Next step

Open **Billing** and check that your payment method is up to date.