Why credits matter for usage-based billing

Credits have become a core tool in modern billing, particularly for AI companies that rely on usage-based pricing. Promotional credits can drive sign-ups, while prepaid credits offer up-front cash flow and a safeguard against fraud. These concerns are amplified for businesses with high costs of goods sold, where usage grows linearly and even minor fraudulent activity can materially impact profitability. Up-front payment becomes a critical defense.

Stripe Billing has now added native support for promotional and paid credits within usage-based billing. This allows businesses to implement credit drawdowns with granular control over timing and full transparency into every transaction.

Flexible credit grants and expiration

Businesses can define both start and end dates for credits, enabling time-bound promotions such as a credit valid for the next 30 days. The system also respects billing cycle boundaries: if a credit becomes effective after the current cycle, it will not be applied to the current invoice. This level of control extends to expiration, so credits can be aligned to your specific business strategy.

Transparency is built into the core of the feature. Every credit action—grant, use, or expiration—is recorded in an immutable ledger accessible through the credit balance transactions API. This gives you an authoritative record to track which invoices a particular credit grant was applied to and to answer customer queries about credit expiration accurately.

How the ledger system operates

The credits feature is underpinned by a ledger system designed for reliability and consistency. Its key properties include:

  • Unchangeable records: Ledger transactions cannot be altered or deleted, preserving a complete history.
  • Smart timing: Each transaction includes an "effective time" for precise tracking.
  • All-or-nothing transactions: Related transactions, such as a single credit grant applied across multiple invoice line items, either all succeed or all fail.
  • Coordination across services: The ledger works with other internal Stripe services via a two-phase commit method.

When an invoice is prepared, relevant credits are applied automatically, with the credit balance transactions API reflecting usage instantly. If an error occurs during application, the system can safely reverse the credit usage. During the brief application window, credits are locked to protect accuracy; attempted modifications will receive a message to retry shortly.

Roadmap

Stripe plans to expand credits capabilities with upcoming support for nonmonetary credits, more control over funding credits, and real-time updates of available balances. Documentation for the current feature is available via Stripe's billing credits docs.