Configuration

The billing configuration ensures consistent behavior across the application and any billing provider.

• UI: Display accurate data in the user interface, including pricing tables and billing sections.
• Checkout: Generate valid checkout sessions based on your configuration.
• Access: Enable functionality such as feature-gated access tied to specific purchases.

Schema

The billing configuration is composed of the following entities:

• Product: Defines the offering (e.g. Starter, Pro, Enterprise, etc.) with 1-n plans.
• Plan: Defines the payment plan (e.g. Pro Monthly, Pro Yearly. etc) with 1-n prices.
• Price: Defines the type, interval, model, amount and currency.

Following enums define a price more granulary:

• PriceType: Can be recurring or one-time.
• PriceInterval: Can be month, year or undefined.
• PriceModel: Can be flat, per_seat or metered.

Multiple prices are required if you want to combine multiple strategies, so more line items will be generate on the invoice.

Configuration

The configuration is located at packages/billing/src/config.ts. A simple monthly pro plan would look like this:

export const billingConfig = createBillingConfig({  products: [    {      id: 'pro',      name: 'Pro',      description: 'Best for most teams.',      label: 'Get started',      recommended: true,      features: ['Feature 1', 'Feature 2'],      plans: [        {          id: 'plan-pro-month',          displayIntervals: [PriceInterval.Month],          trialDays: 7,          prices: [            {              id: 'price-pro-month-id',              interval: PriceInterval.Month,              type: PriceType.Recurring,              model: PriceModel.Flat,              cost: 24,              currency: 'USD'            }          ]        }      ]    }  ]});

It's important to differentiate the technical terms product and plan. Often in marketing the term plan is used for everything, but technically the term only refers to a payment plan of a product.