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# Configure a Rating processor

> Learn how to transform raw usage data into billable rated records by configuring a Rating processor.

Learn how to transform raw usage data into billable rated records by configuring a Rating processor.

Navigate to **Mediation** > **Meters**

Create a **Custom** meter.

Select and drag the **Rating** processor type on to the meter stream page.

In the **Rating** settings page, enter a **Name** for the processor.

Specify the field mappings.

Field mappings define the join logic, how event records should be matched to reference data.

| Field               | Required | Description                                                                                                                                                          |
| ------------------- | -------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Subscription Number | No       | Identifier for the subscription.                                                                                                                                     |
| Charge Number       | No       | Unique identifier of the charge.                                                                                                                                     |
| Quantity            | Yes      | The amount of usage to be rated.                                                                                                                                     |
| Price Quantity      | No       | Cumulative usage to determine the correct tier in tiered/volume pricing models. Mandatory for tiered/volume pricing models, otherwise optional.                      |
| Event Time          | No       | Use a field value from the event to accurately identify the applicable charge segment. If left blank, the latest timestamp will be used to determine the event time. |
| Date Time Format    | No       | Date time format corresponding to the Event Time.                                                                                                                    |

Sample Date Time formats

| Format Pattern          | Sample Value            | Notes                                 |
| ----------------------- | ----------------------- | ------------------------------------- |
| yyyy-MM-dd              | 2025-09-08              | ISO-like date, safest and most common |
| M/d/yyyy                | 9/8/2025                | Allows single-digit month/day         |
| dd-MM-yyyy              | 08-09-2025              | Year/Month/Day with slashes           |
| yyyyMMdd                | 20250908                | Date + hour:minute (24h)              |
| yyyy-MM-dd HH:mm        | 2025-09-08 14:30        | Date + hour:minute (24h)              |
| yyyy-MM-dd HH:mm:ss     | 2025-09-08 14:30:59     | Date + time to seconds                |
| yyyy-MM-dd'T'HH:mm:ss   | 2025-09-08T14:30:59     | ISO-8601 style with T separator       |
| yyyy-MM-dd HH:mm:ss.SSS | 2025-09-08 14:30:59.123 | Includes milliseconds                 |
| MM/dd/yyyy hh:mm a      | 09/08/2025 02:30 PM     | US-style date with 12h clock + AM/PM  |

Click **Save**.