Does it support usage-based billing?

Yes, the skill includes implementation patterns for calculating charges based on consumption alongside standard fixed-rate subscription fees.

Can it handle taxes and VAT?

Yes, it includes a modular tax calculation framework supporting various jurisdictions including US Sales Tax, UK VAT, and Australian GST.

How does this skill help with failed payments?

It provides specialized logic for dunning management, including retry schedules and automated customer notifications to recover revenue from failed transactions.

How is proration handled for plan changes?

It features a proration calculator that automatically determines credits and charges when a user upgrades or downgrades their plan in the middle of a billing cycle.

Billing Automation

Name: Billing Automation
Author: wshobson

bywshobson

•

23,194

•

E-commerce Solutions

Automates the complete subscription lifecycle, from recurring payment processing and invoice generation to dunning management and tax calculation.

This skill empowers Claude to architect and implement complex billing engines for SaaS and subscription-based products. It provides standardized patterns for managing subscription states, handling prorated charges during plan changes, and executing dunning workflows to recover failed payments. By integrating logic for tax calculation and usage-based billing, it ensures that developers can build robust, production-ready financial systems while maintaining compliance and maximizing revenue retention.

Key Features

01Intelligent dunning and failed payment recovery workflows

02Subscription lifecycle and state management

03Multi-jurisdiction tax and VAT calculation support

0423,194 GitHub stars

05Automated invoice generation and delivery

06Proration logic for mid-cycle plan adjustments

Use Cases

01Implementing usage-based billing logic for API products

02Automating customer notifications for failed credit card payments

03Building a recurring billing system for a SaaS platform

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add wshobson/agents billing-automation

For use in Claude.ai and ChatGPT

Download Skill