Question

A global enterprise runs 60 AWS accounts under a single AWS Organizations management account with consolidated billing. The finance team needs to allocate costs back to individual business units (chargeback) with line-item granularity, including Reserved Instance and Savings Plans amortization, and they want to build custom dashboards and run SQL queries against the raw billing data. Business units are already grouped into OUs that mirror their organizational structure, and every resource is tagged with a 'CostCenter' user-defined tag. What is the MOST effective solution to enable detailed, queryable chargeback reporting across the organization?

Accepted Answer

Enable the AWS Cost and Usage Report (CUR) in the management account, activate the 'CostCenter' user-defined cost allocation tag in the Billing console, and query the CUR data in Amazon S3 using Amazon Athena.

Answer

Enable AWS Cost Explorer in each member account and grant finance IAM read-only access in every account to manually export and combine monthly cost reports.

Answer

Set up AWS Budgets with a separate budget per OU and rely on budget alert notifications to reconstruct per-business-unit spend at the end of each month.

Answer

Use consolidated billing PDF invoices from the management account and split charges by OU membership using a manually maintained spreadsheet mapping.