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

0•

Soluciones de Comercio Electrónico

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

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.

Características Principales

01Flexible billing cycles including monthly, annual, and usage-based models

02Subscription lifecycle management (Trial, Active, Past Due, Canceled)

03Regional tax, VAT, and GST calculation logic

04Proration calculation for plan upgrades, downgrades, and seat changes

05Automated dunning and failed payment recovery workflows

060 GitHub stars

Casos de Uso

01Developing usage-based billing systems that charge customers based on consumption

02Automating recurring invoice generation and delivery for enterprise clients

03Building a SaaS subscription platform with tiered pricing and trial periods

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add hermeticormus/after-the-third-cup billing-automation

For use in Claude.ai and ChatGPT

Download Skill