# Billing Preview Run

A billing preview run asynchronously generates a downloadable CSV file containing a preview of future invoice item data and credit memo item data for a batch of customer accounts.
**Note**: Credit memo item data is only available if you have the Invoice Settlement feature enabled.

 - [POST /v1/billing-preview-runs](https://developer.zuora.com/v1-api-reference/api/billing-preview-run/post_billingpreviewrun.md): Creates a billing preview run for single and multiple customer accounts. The maximum supported preview duration is 20 years, calculated from the current date to the target date. You can run up to 20 b
 - [GET /v1/billing-preview-runs/{billingPreviewRunId}](https://developer.zuora.com/v1-api-reference/api/billing-preview-run/get_billingpreviewrun.md): Retrieves a preview of future invoice items for multiple customer accounts through a billing preview run. If you have the Invoice Settlement feature enabled, you can also retrieve a preview of future