Using Amazon cost allocation tags - Amazon Billing
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Using Amazon cost allocation tags

For questions about your Amazon bills or to appeal your charges, contact Amazon Web Services Support to address your inquiries immediately. To get help, see Getting help with Amazon Billing. To understand your bills page contents, see Using the Bills page to understand your monthly charges and invoice.

A tag is a label that you or Amazon assigns to an Amazon resource. Each tag consists of a key and a value. For each resource, each tag key must be unique, and each tag key can have only one value. You can use tags to organize your resources, and cost allocation tags to track your Amazon costs on a detailed level. After you activate cost allocation tags, Amazon uses the cost allocation tags to organize your resource costs on your cost allocation report, to make it easier for you to categorize and track your Amazon costs.

Amazon provides two types of cost allocation tags, an Amazon-generated tags and user-defined tags.

Amazon, or Amazon Web Services Marketplace ISV defines, creates, and applies the Amazon-generated tags for you, and you define, create, and apply user-defined tags. You must activate both types of tags separately before they can appear in Cost Explorer or on a cost allocation report.

The following diagram illustrates the concept. In the example, you've assigned and activated tags on two Amazon EC2 instances, one tag called Cost Center and another tag called Stack. Each of the tags has an associated value. You also activated the Amazon-generated tags, createdBy before creating these resources. The createdBy tag tracks who created the resource. The user-defined tags use the user prefix, and the Amazon-generated tag uses the aws: prefix.

Example tag keys for two Amazon EC2 instances.

After you or Amazon applies tags to your Amazon resources (such as Amazon EC2 instances or Amazon S3 buckets) and you activate the tags in the Billing and Cost Management console, Amazon generates a cost allocation report as a comma-separated value (CSV file) with your usage and costs grouped by your active tags. You can apply tags that represent business categories (such as cost centers, application names, or owners) to organize your costs across multiple services.

The cost allocation report includes all of your Amazon costs for each billing period. The report includes both tagged and untagged resources, so that you can clearly organize the charges for resources. For example, if you tag resources with an application name, you can track the total cost of a single application that runs on those resources. The following screenshot shows a partial report with columns for each tag.

Partial cost allocation report showing your tag names, which are also called keys, as columns.

At the end of the billing cycle, the total charges (tagged and untagged) on the billing report with cost allocation tags reconciles with the total charges on your Bills page total and other billing reports for the same period.

You can also use tags to filter views in Cost Explorer. For more information about Cost Explorer, see Analyzing your costs with Amazon Cost Explorer.

For more information about activating the Amazon-generated tags, see Activating the Amazon generated cost allocation tags. For more information about applying and activating user-defined tags, see User-defined cost allocation tags. All tags can take up to 24 hours to appear in the Billing and Cost Management console.

Notes

  • As a best practice, don't include sensitive information in tags.

  • Only the management account in an organization and single accounts that aren't members of an organization have access to the cost allocation tags manager in the Billing console.

  • To create and update tags, use Amazon Tag Editor. For more information about Tag Editor, see Using Tag Editor in the Tagging Amazon Resources User Guide.

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