Starting after April 13, 2025, Cloud Composer 3 will unify its billing with BigQuery

## Announcement Starting after **April 13, 2025**, Cloud Composer 3 will **unify its billing with BigQuery**. The Cloud Composer 3 standard milli DCU-hours SKU will be replaced with the new BigQuery Engine for Apache Airflow SKU, which will be calculated based on the number of BigQuery slot hours that your Cloud Composer 3 environments consume. Other SKUs will be renamed and moved under the BigQuery hierarchy. The change will be rolled out gradually to all regions supported by Cloud Composer 3\. For more information about the change, see [Transition to BigQuery slot-hour-based pricing](https://cloud.google.com/composer/pricing#composer-3-bq-sku).