Why am I being charged for customer master keys?

Last updated: 2020-12-18

I have a charge for customer master keys (CMKs) on my AWS bill.


Customer master keys (CMKs) are used with the AWS Key Management Service (AWS KMS). You are billed for all active or disabled CMKs on your account. You are also charged for the API requests made to the AWS Key Management Service (AWS KMS) out of the Free Tier usage.

To see a list of CMKs on your account, choose Customer managed keys in the AWS KMS console. To stop the charges for the CMK, delete the CMK.

Warning: If you delete the CMK, any services that you configured that use the CMK as part of their function are affected.

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