What are Amazon Cost and Usage Reports? - Amazon Data Exports
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What are Amazon Cost and Usage Reports?

The Amazon Cost and Usage Reports (Amazon CUR) contains the most comprehensive set of cost and usage data available. You can use Cost and Usage Reports to publish your Amazon billing reports to an Amazon Simple Storage Service (Amazon S3) bucket that you own. You can receive reports that break down your costs by the hour, day, or month, by product or product resource, or by tags that you define yourself. Amazon updates the report in your bucket once a day in comma-separated value (CSV) format. You can view the reports using spreadsheet software such as Microsoft Excel or Apache OpenOffice Calc, or access them from an application using the Amazon S3 API.

Amazon Cost and Usage Reports tracks your Amazon usage and provides estimated charges associated with your account. Each report contains line items for each unique combination of Amazon products, usage type, and operation that you use in your Amazon account. You can customize the Amazon Cost and Usage Reports to aggregate the information either by the hour, day, or month.

Amazon Cost and Usage Reports can do the following:

  • Deliver report files to your Amazon S3 bucket

  • Update the report up to three times a day

  • Create, retrieve, and delete your reports using the Amazon CUR API Reference

How Cost and Usage Reports work

After you create a Cost and Usage Report, Amazon sends your report to the Amazon S3 bucket that you specify. Amazon updates your report at least once a day until your charges are finalized.

Your report files consist of a .csv file or a collection of .csv files and a manifest file. You can choose to configure your report data for integration with Amazon Athena, Amazon Redshift, or Amazon QuickSight.

Report timeline

After you create your report, it can take up to 24 hours for Amazon to deliver the first report to your Amazon S3 bucket.

After delivery starts, Amazon updates the report files at least once a day. Each report update in a given month is cumulative, so each version of the report includes all of the billing data for the month to date. The report updates that you receive throughout the month are estimates. The charges are subject to change as you continue to use your Amazon services.


Different Amazon services provide your usage-based billing information at different times, so you might notice updates to a certain hour or day come in at different times.

Amazon builds on previous reports until the end of the billing period. Amazon finalizes your report’s usage charges after issuing an invoice at the end of the month. After the end of the report billing period, Amazon generates a new report for the next month with none of the information from the previous report.

After your report is finalized, Amazon might update the report if Amazon applies refunds, credits, or Amazon Support fees to your usage for the month. Because Developer, Business, and Enterprise Support are calculated based on final usage charges, those are reflected on the sixth or seventh of the month for the prior month’s Cost and Usage Report. Amazon applies credits or refunds based on the terms of your agreement or contract with Amazon.

Report files

Your report is a .csv file or a collection of .csv files stored in an Amazon S3 bucket. The number of files that your report generates depends on your selection for report versioning and the size of your report.

When you create a report, you can choose to create new report versions or overwrite the existing report version with every update. If you choose to create new report versions, then your report generates more files with every update.

The size of an individual report can grow to more than a gigabyte and might exceed the capacity of desktop spreadsheet applications to display every line. If a report is larger than most applications can handle (around 1 million rows), then Amazon splits the report into multiple files that are stored in the same folder in the Amazon S3 bucket.

Amazon also generates refunds into separate files. Amazon issues refunds after the closing of a monthly bill.

For more information on report files, file-naming conventions, and versioning, see Understanding your report versions.

Report columns

Each report includes several columns with details about your Amazon costs and usage. The columns that Amazon includes in your report depend on your usage during the month.

Every report includes columns with the identity/, bill/, and lineItem/ prefixes. All other columns are included only if your monthly Amazon usage generates data to populate those columns.

For example, your report includes savingsPlan/ columns only if you used Savings Plans during that month.

To learn more about the columns in your report, see the Data dictionary.

Using your report

You can download your report from the Amazon S3 console, query the report using Amazon Athena, or upload the report into Amazon Redshift or Amazon QuickSight.