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Guide

How to build a subscription billing system

Follow these steps in Evonx to subscription billing with plans, invoices, and dunning. Pair with the subscription billing template when SaaS entitlements must stay in sync with payments.

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Step-by-step

Map plans and entitlements

Document tiers, meters, trials, and feature flags before coding billing logic.

Start from the billing template

Open the subscription billing template or describe plans, subscriptions, and invoices explicitly.

Model subscriptions and invoices

Create customers, subscriptions, invoice lines, proration events, and dunning states.

Build customer and admin billing UIs

Ask for plan changes, payment method updates, and admin credit tools.

Wire Stripe webhooks

Verify signatures and update entitlements idempotently on invoice and subscription events.

Preview failure cases

Simulate past-due, cancel, and upgrade proration in test mode before merge.

Outcome

Subscription billing software with plans, invoices, dunning, and entitlement sync you can ship.

Related resources

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FAQ

Should Stripe be the system of record?

Often yes for payments. Keep local subscription and entitlement mirrors for product gates and reporting.

How is this different from the Stripe subscriptions guide?

That guide is integration-focused. This one covers product billing entities and admin surfaces end to end.

Do I need usage metering day one?

Only if pricing depends on it. Start with seat or flat plans; add meters as an evolution thread.

Build production software with Evonx

Start from a template or connect an existing repository. Evonx helps you ship real applications with preview, evolution threads, and pull-request delivery—not disposable demos.

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