Does it support international tax calculations?

Yes, it includes patterns for identifying tax jurisdictions and applying regional rates such as US Sales Tax, UK VAT, and Australian GST.

What payment intervals are supported by this skill?

The skill supports a wide range of intervals including monthly, annual, quarterly, and weekly billing, as well as custom logic for usage-based or per-seat billing models.

Can I calculate prorated charges for plan changes?

Yes, the skill provides logic to calculate unused amounts on old plans and apply credits or charges for new plans when users switch mid-cycle.

How does it handle failed payments?

It includes a dedicated Dunning Management system that automates retry schedules, sends customer notifications, and manages account restrictions during grace periods.

Billing Automation

Name: Billing Automation
Author: HermeticOrmus

byHermeticOrmus

E-commerce Solutions

Automates subscription lifecycles, recurring invoices, and payment recovery for modern SaaS and e-commerce applications.

About

This Claude Code skill provides developers with robust implementation patterns for building comprehensive automated billing systems from the ground up. It covers the entire subscription lifecycle—from trial initiation to cancellation—and includes sophisticated dunning management logic to recover failed payments through automated retries and notifications. With built-in support for mid-cycle proration, usage-based billing, and regional tax calculations, this skill serves as an essential blueprint for engineers looking to implement reliable, production-grade recurring revenue workflows in their software projects.

Key Features

Flexible billing cycles including monthly, annual, and usage-based models
Subscription lifecycle management (Trial, Active, Past Due, Canceled)
Regional tax, VAT, and GST calculation logic
Proration calculation for plan upgrades, downgrades, and seat changes
Automated dunning and failed payment recovery workflows
0 GitHub stars

Use Cases

Developing usage-based billing systems that charge customers based on consumption
Automating recurring invoice generation and delivery for enterprise clients
Building a SaaS subscription platform with tiered pricing and trial periods

About

Key Features

Flexible billing cycles including monthly, annual, and usage-based models
Subscription lifecycle management (Trial, Active, Past Due, Canceled)
Regional tax, VAT, and GST calculation logic
Proration calculation for plan upgrades, downgrades, and seat changes
Automated dunning and failed payment recovery workflows
0 GitHub stars

Use Cases

Developing usage-based billing systems that charge customers based on consumption
Automating recurring invoice generation and delivery for enterprise clients
Building a SaaS subscription platform with tiered pricing and trial periods