Stripe, wired right the first time.
Production-ready layer: subscriptions, invoicing, webhooks with idempotency, dunning, Stripe Tax. 2–3 weeks, monthly subscription delivery.
Who this is for
Founder or product manager wiring Stripe into a custom app, overwhelmed by the docs, where subscriptions + tax + webhooks each have a minefield of edge cases.
The pain today
- Stripe Products and Prices model unclear — what goes where
- Webhooks firing twice or missing, breaking downstream state
- Dunning retries not configured — failed payments leak revenue
- Tax (EU VAT, US sales tax) deferred but now audit-pending
- Subscription upgrade/downgrade creating proration edge cases
The outcome you get
- Subscriptions, metered billing, and invoices wired end-to-end
- Webhook handler with idempotency, retry, and replay
- Stripe Tax enabled with correct tax IDs and B2B VAT handling
- Dunning configured — smart retries, custom email, grace period
- Test suite covering webhook edge cases, not just happy path
Stripe Products and Prices explained
A Product is what you sell (the Plan, the SKU). A Price is what you charge for it — same Product can have many Prices (monthly, yearly, per-user, volume tiers). Subscriptions attach to a Price (not a Product), so upgrading from Monthly to Yearly is swapping Price IDs on the Subscription. Usage-based billing adds Metered Prices where usage records are posted to Stripe. This model is clean once you get it, confusing on first read. I set up your Products and Prices to match your actual pricing in week 1, then layer on Subscriptions on top in week 2. No surprises on day of first customer signup.
Webhooks and idempotency patterns
Every Stripe event (payment succeeded, subscription updated, invoice finalized) fires a webhook to your endpoint. Two things break webhook handlers: duplicates (Stripe may send the same event twice), and out-of-order delivery. Idempotency: store the event ID, check before processing, no-op if already handled. Ordering: don't assume events arrive in time order — always re-fetch the relevant Stripe object before making decisions. Retry: Stripe retries webhooks for 3 days with exponential backoff, so a 500 response isn't fatal but a silent bug is. I wire webhooks with a replay endpoint so you can re-process any event manually if something downstream failed.
Tax, dunning, and proration
Stripe Tax handles the calculation once origin and destination addresses are set. You register for tax IDs in each jurisdiction (US states with economic nexus, EU VAT MOSS, UK VAT, etc) — that part is your accountant's job, not mine, but I wire the IDs so Stripe uses them. Dunning: smart retries (3 attempts, spaced intelligently based on Stripe's ML), custom email content, grace period before subscription cancellation. Proration: automatic on plan changes — Stripe computes the correct amount, your code just passes the new Price ID. Mid-cycle upgrades credit the unused portion of the old plan and charge the prorated new plan. All the hard math Stripe already does; what I do is wire it in right.
Case study: bolttech unified payment layer
The Stripe patterns I use on smaller engagements come from the same discipline applied at bolttech's $1B+ unicorn scale. 40+ payment providers integrated through a standardized interface. Webhook idempotency, retry, and replay built into the platform. Tax, reconciliation, dispute handling — all at a level where any bug becomes a headline. 99.9% uptime, 0 post-launch critical bugs on the Payment Service. That discipline doesn't change when I build a single-Stripe integration for a SaaS — the patterns are the same, just smaller surface. Good payment engineering is tedious engineering applied consistently.
Pricing and timeline
Stripe integration work fits the Applications Standard tier at $3,499/mo. Typical timeline: 2–3 weeks for standard subscription billing, 4–6 weeks for complex usage-based or marketplace patterns. Subscription continues through expansion — new pricing tiers, customer portal, dunning refinement — most clients stay engaged for 3–6 months through the initial buildout and early customer feedback cycles. 14-day money-back guarantee, cancel anytime after. Work Made for Hire. Test suite covering webhook edge cases and test-mode Stripe events is part of every delivery.
Stripe Checkout vs Elements vs Payment Element
Three implementation paths. Stripe Checkout: hosted page, fastest to ship, less brand control, good for one-off purchases. Payment Element: embedded UI component, good balance of brand control and Stripe-maintained UX, supports every payment method Stripe offers. Elements (legacy): more manual, rarely the right choice in 2026 — use Payment Element instead. Customer Portal: Stripe-hosted billing management (change plan, update payment method, view invoices) — embed in your app or redirect to it, either works. I pick based on your product UX requirements. Checkout for simple, Payment Element for most subscriptions, Customer Portal for self-serve management.
Recent proof
A comparable engagement, delivered and documented.
Unified payment orchestration across Asia and Europe
Delivered the payment orchestration platform at bolttech, a $1B+ unicorn, with 40+ integrations across multiple regions.
Frequently asked questions
The questions prospects ask before they book.
- Do you handle Stripe Connect for marketplaces?
- Yes — Stripe Connect Express, Custom, and Standard all covered. Marketplace split payments, payout schedules, connected account onboarding, 1099 reporting. Connect is more complex than standard Stripe, so it prices up to the Pro tier at $4,500/mo for the initial buildout.
- How do you handle the EU VAT and US sales tax compliance?
- Stripe Tax calculates tax at checkout once you register tax IDs in each jurisdiction. Registration is your accountant's job; I wire the IDs into Stripe. For B2B EU sales, I enable reverse charge handling (no VAT when the buyer has a valid VAT ID). US sales tax follows the economic nexus registrations you provide.
- What about customer migrations from another billing system?
- Migrating existing customers into Stripe is scoped separately. Typical pattern: preserve subscription start dates, import customer records with payment method tokens (Stripe has import tools for this from major competitors), run a reconciliation pass before go-live. Usually adds 2 weeks to the timeline.
- Can you set up the Stripe-hosted Customer Portal?
- Yes, with custom branding (logo, colors, domain). For teams wanting deeper integration, I build a custom billing UI on top of Stripe APIs instead — more work but fully brand-controlled and can include features the hosted portal doesn't have (credit balance display, custom cancellation flow).
- What does the test suite cover?
- Every webhook event type your app handles, with Stripe's test-mode event fixtures. Subscription lifecycle (trial, active, past_due, canceled), proration edge cases, dispute events, failed payment + dunning retry, tax calculation across jurisdictions. The suite runs in CI on every PR so billing logic doesn't silently break.
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