Understanding dates for cost allocation tags - AWS Billing

Understanding dates for cost allocation tags

Prerequisites

To view these dates in the Cost allocation tags page of the AWS Billing and Cost Management console, you must have the ce:ListCostAllocationTags permission.

For more information about updating your AWS Identity and Access Management (IAM) policies, see Managing access permissions.

When you use cost allocation tags, you can determine when the tags were last used or last updated with the following metadata fields:

  • Last updated date – The last date that the tag key was either activated or deactivated for cost allocation.

    For example, suppose that your tag key lambda:createdby changed from inactive to active on July 1, 2023. This means that the Last updated date column will show July 1, 2023.

  • Last used month – The last month that the tag key was used on an AWS resource.

    For example, suppose that your tag key lambda:createdby was last used on April 2023. The Last used month column will show April 2023. This means that the tag key hasn't been associated with any resource since that date.

    Notes

    • The Last updated date column appears empty for newly created tag keys that haven't been activated.

    • The Last used month column shows Before April 2023 for tag keys that were used before April 2023 and that aren't currently associated with any resource.