subscription-billing

Idempotent webhook processing requires persisting processed event IDs and verifying Stripe webhook signatures to tolerate retries without double-processing. This prevents duplicate subscription state updates and incorrect charges.

Subscription billing systems should treat Stripe webhooks as the source of truth because API responses can be premature or inconsistent. Updating your database only after webhook confirmation ensures authoritative subscription state and prevents revenue loss from failed payment dunning flows.

Handling proration and trials during mid-cycle subscription upgrades and downgrades requires tracking webhook events for invoice changes and trial conversion rules. Your SaaS backend updates subscription state only after receiving these webhook confirmations to maintain accurate billing.

The best way to build a dunning flow for failed subscription payments is to implement staged failed-payment recovery with grace periods. This approach preserves user access while attempting to recover failed charges through automated retry logic triggered by webhook events.

Subscription billing with Stripe webhooks does not require storing customer card data. You should avoid storing card data entirely and instead rely on Stripe's secure tokenization, using event-created timestamps for clocking and database-driven state updates triggered by webhook confirmations.

Using event.created timestamps instead of received time when processing Stripe webhooks ensures accurate clocking for subscription billing events. This prevents timing discrepancies during upgrades, downgrades, and proration calculations, maintaining authoritative subscription state in your database.