# How Does Commitment Discount Attribution Work

## Attribution Concept

This touches on a concept called "Attribution" in Archera, which handles which RIs & SPs are applied to which resources within your account, along with associated costs & savings.

## AWS Default Attribution Strategy

AWS has a default attribution strategy where all commitments are applied against all resources based on what gets the highest discount, and for resources that get the same discount, attribution is handled in an arbitrary manner.

This behavior applies both to:

* Commitments purchased natively through AWS Cost Explorer
* Commitments purchased through Archera (even if they were purchased for a particular segment)

## Archera's Default Attribution

Archera, by default, employs the AWS default attribution strategy. We do this because the default attribution strategy aligns with what will be shown on your AWS bill and usage report.

Using a different attribution strategy could lead to discrepancies between AWS and Archera in terms of the precise cost of each resource.

## Custom Attribution for Enterprise Customers

For customers seeking an alternative chargeback model distinct from the AWS default — featuring a custom attribution strategy — we offer the capability to support custom attributions for any Reserved Instance (RI) or Savings Plan (SP) through our Custom Reporting Functionality.

This feature is employed by our enterprise customers for:

* In-depth analysis of COGS
* Margin analysis
* Business Unit (BU) showback/chargeback
* Other customized functionalities

## Related Resources

* [Billing and GRIs](/help-center/billing/billing-and-gris.md)
* [How Does Commitment Discount Attribution Work in Archera?](/help-center/billing/discount-attribution.md)
* [Product Overview](/help-center/getting-started/product-overview.md)


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