# Metering and Charging

> Charging is based on AI Units and it takes into account the classification and extraction models consumption. Depending on the project type, visit the following pages:

Charging is based on AI Units and it takes into account the classification and extraction models consumption. Depending on the project type, visit the following pages:

* [AI Center-based projects](https://docs.uipath.com/document-understanding/automation-suite/2024.10/classic-user-guide/metering-charging-logic)
* [Modern projects](https://docs.uipath.com/document-understanding/automation-suite/2024.10/user-guide/metering-charging-logic)