---
url: /relyai-acellemail/guides/quotas-limits-and-credits.md
description: >-
  Cap AI usage with per-task rate limits and an optional per-customer daily cap,
  understand AI Credits on the subscription page, and move usage onto customers'
  own keys.
---

# Quotas, limits and credits

Three levers keep AI cost in check: per-task rate caps, an optional per-customer daily cap, and moving usage onto customers' own provider keys.

## Rate caps

**RelyAI → Settings → Quotas & Limits.** Each AI task has a rate cap so no one can hammer your provider.

| Cap | Default |
| --- | --- |
| Per-task rate | **20/minute**, **500/hour** |
| Per-customer daily | **0 = uncapped** |

![The Quotas & Limits settings tab](/relyai-acellemail/img/relyai-quotas-limits-and-credits-tab.png)
*RelyAI → Settings → Quotas & Limits*

Configure limits to prevent provider exhaustion:

* **Per-task caps:** Adjust per-minute and per-hour thresholds to balance speed and protection.
* **Per-customer cap:** Set a daily maximum to prevent individual accounts from monopolizing capacity.
* **Provider backoff:** Automatically handles upstream HTTP 429 responses with exponential backoff.

## AI Credits

When plan-based AI metering is enabled:

* **Customer dashboard:** Displays an **AI Credits** card on the subscription page showing remaining allowance this cycle.
* **Unmetered plans:** Displays *"No AI metering on this plan"*.
* **Native accounting:** Integrates directly with AcelleMail's built-in AI credit system.

## Move usage onto customers' own keys

Offload API consumption to end-user accounts:

* **Enable BYOK:** Allow customer API keys under [engine settings](/relyai-acellemail/guides/connect-an-engine).
* **User configuration:** Customers enter their personal provider key under **Account → AI**.
* **Quota isolation:** All requests run against the customer's personal API quota instead of the system key.

## Related pages

* [Connect an engine](/relyai-acellemail/guides/connect-an-engine)
* [Settings reference](/relyai-acellemail/settings)