> ## Documentation Index
> Fetch the complete documentation index at: https://docs.slm.m1amdocs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Working with Rate Plans

Subscribe Rate Plans allow you to create tiered pricing structures for your Products. These can be License (prepaid) or Usage based (postpaid), and the units by which they are measured may be defined to fit your needs.

Most Rate Plan operations should be performed using the Subscribe GUI, including creating and applying Rate Plans to existing Products. Use the Subscribe API to create an AutoBill that includes an `AutoBillItem` with a pre-defined Rate Plan, to upload collected Rated Units, or to fetch a history of reported Events.

**Note:** Use of the forward slash character (/) in merchant identifiers is not allowed. See [Merchant Identifiers](Merchant_Identifiers) for more information.

* **[Recording Rated Units](../topics/Recording_Rated_Units)**

* **[Deducting Rated Units](../topics/Deducting_Rated_Units)**

* **[Reversing (Billed) Rated Unit Events](../topics/Reversing__Billed__Rated)**

* **[Fetching and Reporting Rated Units](../topics/Fetching_and_Reporting_R)**

* **[Understanding License Based Quantities](../topics/Understanding_License_Ba)**


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