I purchased an Amazon EC2 Reserved Instance, but it's being used in a way that I didn't expect. Why is my Reserved Instance applying to my usage in the way that it is?

If your Reserved Instance isn't applying to any usage at all, see My EC2 Reserved Instance isn't applying to my billing—why?

The most common reason that a Reserved Instance discount isn't applying to the instance in the way that you expect is that the terms of the Reserved Instance do not match any instances running on your account. The Reserved Instance that you purchase must match the platform, type, size (or size footprint), region (if applicable), and tenancy of an instance for it to apply. Check the terms of your Reserved Instance and the instance it applies to.

If the Reserved Instance terms do match the instance you intended it to apply to, consider the following additional conditions:

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Published: 2017-06-26

Updated: 2018-01-30