Using AWS Budgets to manage costs
AWS Budgets a feature of AWS Billing and Cost Management, allows you to set custom budgets that alert you when your costs or usage exceed (or are forecasted to exceed) your budgeted amount.
Creating a budget for CloudTrail by using AWS Budgets is a recommended best practice, and can help you track your CloudTrail spending. Cost-based budgets help promote awareness of how much you might be billed for your CloudTrail use. Budget alerts notify you when your bill reaches a threshold that you define. When you receive a budget alert, you can make changes before the end of the billing cycle to manage your costs.
Note
Though you can apply tags to CloudTrail trails, AWS Billing cannot currently use tags applied to trails for cost allocation. Cost Explorer can show costs for CloudTrail Lake event data stores and for the CloudTrail service as a whole.
To get started with AWS Budgets, open AWS Billing and Cost Management
Creating user-defined cost allocation tags for CloudTrail Lake event data stores
You can create user-defined cost allocation tags to track the query and ingestion costs for your CloudTrail Lake event data stores. A user-defined cost allocation tag is a key-value pair that you can associate with an event data store. After you activate cost allocation tags, AWS uses the tags to organize your resource costs on your cost allocation report.
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To create tags in the console, see step 9 of the To create an event data store for CloudTrail management or data events procedure.
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To create tags using the CloudTrail API, see CreateEventDataStore and AddTags in the AWS CloudTrail API Reference.
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To create tags using the AWS CLI, see create-event-data-store
and add-tags in the AWS CLI Command Reference.
For more information about activating tags, see Activating user-defined cost allocation tags.