Designing a Usage-Based Billing Pipeline for SaaS

Sat, 01 Aug 2026 17:26:52 +0530

In How Multi-Tenant SaaS Actually Works, I left one major promise unfulfilled at the end: “Billing is an entire system design on its own. The billing pipeline gets its own post.”

This is that post.

Building a billing pipeline is different from building almost any other backend component. If your caching layer has a bug, latencies increase by 50ms. If your log aggregator drops a packet, a dashboard chart dips for a minute. But if your billing pipeline has a bug, it operates silently in the dark. It either undercharges your customers (and your business bleeds cash without throwing a single 500 status code) or overcharges them (and you wake up to customer support tickets, disputes, and ruined trust).

Billing on Lorbic

Designing a Usage-Based Billing Pipeline for SaaS