> ## Documentation Index
> Fetch the complete documentation index at: /help/llms.txt
> Use this file to discover all available pages before exploring further.

# Buy AI credits

> Purchase a one-time credit pack.

Purchase a one-time credit pack when monthly included credits are not enough. Any plan can buy packs. Purchased credits do not expire.

**1. Open Account → Billing**

Go to [Account → Billing](https://app.vocabmonster.com/account#billing).

**2. Choose a credit-pack size**

Pack prices are listed on the Billing tab.

**3. Complete Stripe Checkout**

Pay on Stripe. Vocab Monster does not store full card numbers or CVCs.

**4. Confirm the balance**

Return to Billing to see purchased credits. They are used after the monthly allotment is gone. See [How credits work](/help/account/how-credits-work.md).


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