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.

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)

• Optional administrator and shop manager checkout access

• 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

• Staff role badges (Admin / Shop Manager) on usage details and customer list

• 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

• Enable the payment method in WooCommerce > Settings > Payments

• Customers select “Monthly Invoice” at checkout

• Orders are consolidated by the billing closing day

• 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

• Staff checkout (optional): Enable “Administrator & Shop Manager Access” to allow administrator and shop manager accounts to use this payment method at checkout

Note: By default, staff roles (administrator, editor, author, contributor, shop_manager) cannot use this payment method at checkout. When “Administrator & Shop Manager Access” is enabled, administrator and shop_manager roles are allowed.

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.