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.

skills.sh installs: 290
GitHub stars: 39.4K
last updated: Jun 3, 2026

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Install

$ npx -y skills add sickn33/antigravity-awesome-skills --skill billing-automation --agent claude-code

Installs into .claude/skills of the current project.

Files

Billing Automation

Master automated billing systems including recurring billing, invoice generation, dunning management, proration, and tax calculation.

Use this skill when

Implementing SaaS subscription billing
Automating invoice generation and delivery
Managing failed payment recovery (dunning)
Calculating prorated charges for plan changes
Handling sales tax, VAT, and GST
Processing usage-based billing
Managing billing cycles and renewals

Do not use this skill when

You only need a one-off invoice or manual billing
The task is unrelated to billing or subscriptions
You cannot change pricing, plans, or billing flows

Instructions

Define plans, pricing, billing intervals, and proration rules.
Map subscription lifecycle states and renewal/cancellation behavior.
Implement invoicing, payments, retries, and dunning workflows.
Model taxes and compliance requirements per region.
Validate with sandbox payments and reconcile ledger outputs.
If detailed templates are required, open resources/implementation-playbook.md.