is now an ernd partner: 10% back on inference 
In this guide
What does the error mean?
There are two versions, and they use different status codes.
When your organization reaches its tier’s monthly spend cap, Anthropic returns HTTP 429 with type rate_limit_error. The message starts with You have reached your API usage limits: your organization has crossed its monthly API usage threshold and ends with the date you regain access. On the Messages API, error.details.error_code is enforced_spend_limit_reached.
When you hit a spend limit you set yourself, the response is HTTP 400 with type invalid_request_error. The message starts with You have reached your specified API usage limits, or You have reached your specified workspace API usage limits for a workspace limit.
The 429 has no retry-after header. Retrying fails until access resumes, including the SDK’s own automatic retries, so switch those off for this case.
| Tier | Monthly spend cap |
|---|---|
| Start | $500 |
| Build | $1,000 |
| Scale | $200,000 |
| Custom | None, arranged with your account team |
Rates as listed on Anthropic’s Rate limits page, checked November 5, 2026.
Your AI bill, with ernd
What could your AI bill earn?
Enter an amount from $0 to $100,000,000.
back a year at 4%
For US companies. No annual fee. Illustration based on AI vendor spend only. Rewards are points redeemable as cash back.
How do you fix it?
- Check the status code. A 429 with
enforced_spend_limit_reachedmeans the tier cap. A 400 means one of your own limits. - For the tier cap, open the Rate limits page in the Claude Console and click Request tier increase. If it’s urgent, contact Anthropic support too.
- For your own organization limit, open the Billing page. Under Spend limits, click Adjust limit and enter a higher value or remove it.
- For a workspace limit, go to Settings, then Workspaces, pick the workspace and open Spend limits.
- If none of that is possible, access comes back at 00:00 UTC on the first of next month.
How do you keep it from coming back?
Request the tier increase before you need it. Anthropic doesn’t publish when it moves organizations up on its own, so waiting for an automatic bump is a gamble near the end of a busy month.
Workspace spend limits also let you configure alerts at thresholds you choose. Set one well below the cap so the warning lands with days to spare.
Keep an eye on the payment side as well, since the cap and your credit balance are separate. ernd is a card for AI spend that earns 4% back on AI vendor bills, Anthropic’s included.
Our Anthropic rate limits guide covers tiers, caching and the rest of the limits.
The ernd card
Once your billing is back on track.
The card earns rewards on AI spend. It does not bypass provider quotas, fix account restrictions or change provider prices.
Request your cardThe ernd card is a credit card for US companies, with partners across the AI stack built in.
Common questions.
When does access come back after the Anthropic spend cap?
At 00:00 UTC on the first day of the next month, unless your organization moves to a higher tier sooner. The error message states the date.
Can I set a spend limit higher than my tier's cap?
No. A limit you set can't exceed your current tier's cap. To go higher, request a tier increase.
Can I put a spend limit on the Default Workspace?
No. Anthropic doesn't allow spend limits on the Default Workspace, so put the work you want capped in its own workspace.
Sources & methodology
Checked . Providers change prices and terms; the linked official page is the final word. This guide is published by ernd.
ernd is run by Provenance Research Inc.