Billing Automation

If you're building SaaS billing, this handles the recurring stuff you don't want to write from scratch: subscription lifecycle management, prorated plan changes, dunning workflows for failed payments, and multi-region tax calculations. It walks you through defining plans and pricing models, then implementing the actual invoice generation and payment retry logic. The scope is clear about what it won't do, like one-off manual billing or pricing strategy decisions. Honestly, the real value is in the structured approach to dunning and proration, which most teams get wrong the first time. Includes an implementation playbook with patterns and checklists.