Payment and Shipping Method Checkout Fee for WooCommerce

This plugin lets you attach an extra fee — either a percentage of the cart subtotal or a fixed amount — to any WooCommerce payment gateway or shipping method. Configuration lives under WooCommerce → Settings → Checkout Fee.

Typical use cases:

• Pass card-processing surcharges to customers paying with specific gateways.
• Add a handling fee for Cash on Delivery.
• Add a packaging/insurance fee for express shipping methods.

Features:

• Per-method configuration — every payment gateway and shipping method has its own settings.
• Choose between a percentage of cart subtotal or a fixed amount.
• Optional taxable flag so the fee can be included in tax calculations when required.
• Customisable fee label shown to the customer.
• Works with the classic checkout and the block-based Cart & Checkout.
• Declares compatibility with WooCommerce High-Performance Order Storage (HPOS).