Monthly Invoice Gateway for WooCommerce

Monthly Invoice Gateway for WooCommerce adds a deferred payment method to your WooCommerce store. Customers can place orders without immediate payment and receive a consolidated invoice at the end of the billing period.

This plugin is designed for B2B (business-to-business) transactions where monthly invoicing is the standard payment practice.

Note: The plugin includes payment management (e.g. tracking paid/unpaid status). The free version does not include invoice generation or automated invoice notifications — sellers must create and send invoices to customers manually.

Key Features

• Monthly invoice (deferred payment) gateway
• Compatible with both WooCommerce Checkout Block and legacy checkout
• Flexible billing closing day (1st–30th or end of month)
• Optional payment fee (taxable or non-taxable)
• Per-user access control (individual approval system)
• Customizable thank you page message with template variables
• Usage details page with monthly billing breakdown
• Monthly history page with aggregated data
• Customer management page with search and filters
• Payment status tracking (paid/unpaid)
• WooCommerce HPOS (High-Performance Order Storage) compatible
• WooCommerce Cart & Checkout Blocks compatible
• Internationalization (i18n) ready — translations included for Japanese, German, Spanish, French, Italian, and Portuguese (Brazil)

How It Works

1. Enable the payment method in WooCommerce > Settings > Payments
2. Customers select « Monthly Invoice » at checkout
3. Orders are consolidated by the billing closing day
4. Admins manage invoices and payment status from the admin panel

User Access Control

• Automatic (default): All users with the customer role can use invoice payment
• Manual approval: Enable per-user restrictions and individually approve customers on the customer management page

Note: Admin-level roles (administrator, editor, author, contributor, shop_manager) cannot use this payment method.

Thank You Page Variables

Customize the thank you page message with these variables:

• {order_id} — Order ID
• {order_number} — Order number
• {customer_name} — Customer name
• {company_name} — Company name
• {order_total} — Order total
• {order_date} — Order date
• {closing_day} — Billing closing day

Database

When activated, the plugin creates one table (the prefix may differ from wp_ depending on your WordPress configuration):

• wp_cdg_mig_monthly_invoice_payments — Stores invoice payment records per order: order ID, user ID, amount, billing month, payment status (paid/unpaid), and related dates. Used for the usage details and monthly history pages.