Subscription Management System in PHP MySQL with Free Source Code - Rameez Scripts

Recurring revenue is a billing problem before it is a sales problem. This is the system that runs it: subscriptions that renew themselves, invoices raised on schedule, reminders that go out before a renewal instead of after it lapses, and a portal where the customer handles their own account.

The billing engine

Subscriptions carry their own cycle and renew automatically, with the recurring billing engine generating the invoice and tracking what has been paid against it. A cron-driven email reminder goes out ahead of each upcoming renewal — the single change that recovers the most silently lapsed subscriptions. Amounts are multi-currency, so customers in different markets are billed in theirs.

Seeing the book

The same subscriptions read as a Kanban board or a full calendar, depending on whether you are thinking in stages or in dates. Alongside them sit a product catalog, supplier management and a salesperson module, so commissions and sources stay attached to the revenue.

Customers serve themselves

The customer portal lets subscribers sign in — by password or Google OAuth — to see their subscriptions, invoices and payment history without emailing you first. A Gemini AI assistant answers inside the app.

Built for a real deployment

A guided setup wizard installs it, SMTP is configured in-app with a test-email button, and the custom fields builder adds fields to records without touching the schema. There is database backup and restore, maintenance mode, multi-language support, dark themes, and it installs as a progressive web app on a phone. Twenty-three MySQL tables underneath.