While billable metrics are used to measure customer usage, plans are used to apply prices to this usage.
📄️ Plan model
The plan model defines when and how much a customer is charged.
In addition to the price of the plan, you can charge your customers for usage. For instance, you can create charges based on the number of API calls, the number of active users, transactions, compute time, etc. These additional charges relate to the billable metrics defined previously.
A subscription is created when a plan is assigned to a customer. You can assign a plan to a customer at any time (i.e. when the customer record is created or later on).
📄️ Upgrades & Downgrades
To modify an active subscription through the user interface: