Stripe makes payments possible. It does not automatically make your SaaS billing correct. The hard part is connecting Stripe's subscription state to your product state so customers are charged correctly and access changes exactly when it should.
I build Stripe subscription flows with the boring edge cases included, because billing is where "we will handle it later" becomes expensive.
The full subscription flow
A proper Stripe SaaS setup covers checkout, customer creation, subscriptions, trials, upgrades, downgrades, cancellations, invoices, failed payments and the customer portal. Each event needs to update your database in a predictable way so the app always knows what a user can access.
Webhooks as the source of truth
The browser is not the source of truth for billing. Stripe webhooks are. I verify webhook signatures, make handlers idempotent, retry safely and store the billing state your app actually needs. That prevents the classic bug where Stripe says a customer paid but your product never unlocks, or the reverse.
Access control tied to billing
Plans, seats, usage limits and feature flags need to be enforced server-side. I map subscription state to product permissions so a paid plan unlocks the right features, a canceled plan loses access at the right time and failed payments degrade gracefully instead of creating confusion.
Built for SaaS changes
Pricing changes. Plans get renamed. Trials get added. Enterprise deals appear. I design the billing layer so those changes do not require rewriting the whole product. Stripe price ids stay in config, product permissions stay in your database, and the two are connected clearly.
Who this is for
SaaS founders adding subscriptions, products with a half-working Stripe setup, and teams that need billing to be boring before launch. If your product charges recurring revenue, this is worth getting right early.
What you get
- Checkout and customer portal flows matched to your SaaS plans and pricing model
- Reliable webhook handling with idempotency so billing and product access stay in sync
- Trial, upgrade, downgrade, cancellation and failed-payment states handled explicitly
- Server-side access control that never trusts the browser for billing state
