# Usage

Type: object

Active contacts counted so far in the usage month, the calendar month (UTC) that overage is charged for. Present with terms once the month has been counted.

## Properties

- `periodStart` (string, required)
- `periodEnd` (string, required)
- `activeContacts` (integer, required)
- `overageContacts` (integer, required) - Active contacts beyond overage.includedQuantity, each charged overage.unitAmount.
- `overageAmount` (integer, required) - What the overage contacts cost so far, in the base currency's minor unit.