Billing Automation

by wshobson46891e7e60daNo licenseListed Oct 8, 2026Updated Oct 8, 2026

Build automated billing systems for recurring payments, invoicing, subscription lifecycle, and dunning management. Use when implementing subscription billing, automating invoicing, or managing recurring payment systems.

Instructions onlyBusiness & Finance

AI-generated overview

Guides building automated subscription billing systems covering recurring charges, invoicing, dunning, proration and tax.

What it does: This skill provides conceptual guidance for designing automated billing systems, covering billing cycles, subscription states, dunning management and proration. It outlines patterns for recurring payments, invoice generation and delivery, failed-payment recovery, and tax handling such as sales tax, VAT and GST. It also points to a reference file with detailed patterns and worked examples.
When to use it: Use it when implementing SaaS subscription billing, automating invoice generation, or managing recurring payment systems. It also fits work on failed-payment recovery, prorated charges for plan changes, usage-based billing, and billing cycles or renewals.
Requirements: No scripts are included; the skill is instructions only. It references a bundled reference document, and the illustrative code assumes a Python billing library that is not part of the skill.

Billing Automation

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

When to Use This Skill

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

Core Concepts

1. Billing Cycles

Common Intervals:

Monthly (most common for SaaS)
Annual (discounted long-term)
Quarterly
Weekly
Custom (usage-based, per-seat)

2. Subscription States

3. Dunning Management

Automated process to recover failed payments through:

Retry schedules
Customer notifications
Grace periods
Account restrictions

4. Proration

Adjusting charges when:

Upgrading/downgrading mid-cycle
Adding/removing seats
Changing billing frequency

Quick Start

python

from billing import BillingEngine, Subscription
# Initialize billing enginebilling = BillingEngine()
# Create subscriptionsubscription = billing.create_subscription(    customer_id="cus_123",    plan_id="plan_pro_monthly",    billing_cycle_anchor=datetime.now(),    trial_days=14)
# Process billing cyclebilling.process_billing_cycle(subscription.id)

from billing import BillingEngine, Subscription
# Initialize billing enginebilling = BillingEngine()
# Create subscriptionsubscription = billing.create_subscription(    customer_id="cus_123",    plan_id="plan_pro_monthly",    billing_cycle_anchor=datetime.now(),    trial_days=14)
# Process billing cyclebilling.process_billing_cycle(subscription.id)

Detailed patterns and worked examples

Detailed pattern documentation lives in references/details.md. Read that file when the navigation tier above is insufficient.

Source and attribution

Source:wshobson/agentsinplugins/payment-processing/skills/billing-automationat commit46891e7

License: No license

Content belongs to its original authors. SourceWeft indexes it from a public repository.

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Billing Automation

Billing Automation

When to Use This Skill

Core Concepts

1. Billing Cycles

2. Subscription States

3. Dunning Management

4. Proration

Quick Start

Detailed patterns and worked examples

Source and attribution

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