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

# How does billing and credit usage work?

Fireworks uses a **pre-paid credits** model for new self-serve accounts:

* Add a valid payment method and billing address, then purchase credits to use the platform.
* Usage across serverless, on-demand deployments, and fine-tuning deducts from your credit balance.
* If your balance reaches zero and auto top-up is not enabled, usage pauses until you add credits.
* You can configure auto top-up and a monthly budget cap in the billing dashboard.

Legacy and enterprise exceptions:

* Accounts created before **June 1** remain on their existing postpaid terms unless migrated.
* Enterprise accounts can be configured for postpaid billing on request.

For grandfathered and postpaid enterprise accounts, usage and billing operate through a **tiered system**:

* Each **tier** has a monthly usage limit, regardless of available credits.
* Once you reach your tier's limit, **service will be suspended** even if you have remaining credits.
* **Usage limits** reset at the beginning of each month.
* Pre-purchased credits do not prevent additional charges once the limit is exceeded.

<Note>
  Enterprise accounts do not have the same self-serve limits. See [Enterprise quotas](/faq/enterprise/service/quotas) for more information.
</Note>

<Tip>
  For details on spend limits, budget caps, and quota controls, see our [Account quotas guide](/guides/quotas_usage/account-quotas#view-and-adjust-your-spend-limit).
</Tip>