--- title: "Usage-based billing" slug: "metered-billing" updated: 2025-06-13T12:34:46Z published: 2025-06-13T12:34:46Z canonical: "help.frisbii.com/metered-billing" --- > ## Documentation Index > Fetch the complete documentation index at: https://help.frisbii.com/llms.txt > Use this file to discover all available pages before exploring further. # Usage-based billing Usage-based billing is a pricing model where a client is charged based on their consumption level of the product or service. There are three ways to implement Usage-based billing: 1. You can configure and set up a **Usage-based Billing product** with different [pricing models](/frisbii/docs/usage-based-billing) and add it to the subscription as described [here](/frisbii/docs/usage-based-billing) and [here](/frisbii/docs/create-a-subscription). 2. You can use **additional costs**. 1. Under Customers > **Customers** open the **Customer Details** page by double clicking on the concerned customer in the list. 2. In the **Subscriptions** box, click on the subscription you would like to change. 3. In the **Pending costs and credits** box, click on Add costs. 4. Enter the Description, Quantity, Price and VAT rate to the **Order line**. 5. Click on **Confirm**. 3. You can generate an **on-demand invoice for the subscription**. 1. Under Customers > **Customers** open the **Customer Details** page by double clicking on the concerned customer in the list. 2. In the **Subscriptions** box, click on the subscription you would like to change. 3. In the **Invoices** box, click on **Create invoice**. 4. In the **Invoice options** include **Additional order lines**. 5. Configure the rest of the invoice options. 6. Click on **Submit**.