# Quotas
<a name="limits"></a>

To make AWS KMS responsive and performant for all users, AWS KMS applies two types of quotas, resource quotas and request quotas. Each quota is calculated independently for each Region of each AWS account.

All AWS KMS quotas are adjustable, except for the [on-demand rotation resource quota](resource-limits.md#on-demand-rotation-resource-quota) and the [AWS CloudHSM key store request quota](requests-per-second.md#rps-key-stores). To request a quota increase, see [Requesting a quota increase](https://docs.aws.amazon.com/servicequotas/latest/userguide/request-increase.html) in the *Service Quotas User Guide*. To request a quota decrease, to change a quota that is not listed in Service Quotas, or to change a quota in an AWS Region where Service Quotas for AWS KMS is not available, please visit [AWS Support Center](https://console.aws.amazon.com/support/home) and create a case. 

**Topics**
+ [Resource quotas](resource-limits.md)
+ [Request quotas](requests-per-second.md)
+ [Throttling AWS KMS requests](throttling.md)

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for AWS KMS. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query kms` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).