Custom Cart Fees

Custom Cart Fees — a practical guide to WooCommerce cart fees with clear examples you can reuse in real projects.

WooCommerce Plugin Development Series (36/101). Prefer one article? Read the complete WooCommerce plugin development tutorial.

Short description

Add fees inside `woocommerce_cart_calculate_fees` and keep fee logic idempotent.

Conditional fee

add_action('woocommerce_cart_calculate_fees', function ($cart) {
    if ($cart->get_subtotal() < 500) {
        $cart->add_fee('Small order fee', 30);
    }
});