Cmagb Cmagb - 2 months ago 14x
PHP Question

WooCommerce - Make a set of coupons adding a fixed fee to an order

A client has a very odd, urgent request: They would like for a set of coupon codes to add a fee to an the order.

Is this possible?

The problem they are trying to solve is this:

Currently the store offers free shipping to the lower 48 United States, for which I have shipping classes and table rates properly configured. However, the coupons the customer has sold on a daily deal site are supposed to remove the free shipping benefit and add a fixed shipping fee.

How can achieve this.



Yes you can do it with that snippet code (for a set of coupons):

function coupon_add_cart_fee( $bookable_total = 0 ) {
    $has_coupon = false;

    // Set here your specials coupons slugs (one by line - last one have no coma)
    $coupon_codes = array (

    // Set here your fee amount or make fees calculation (see the links in reference)
    $fee = 20;

    if ( is_admin() && ! defined( 'DOING_AJAX' ) )

    // checking if that "special" coupon is applied to customer cart
    foreach ($coupon_codes as $coupon_code) {
        if ( WC()->cart->has_discount( $coupon_code ) ) {

            // If yes apply the fee to the cart
            if ( !$has_coupon ) {
                $has_coupon = true;

    if ( $has_coupon ) {
        WC()->cart->add_fee( 'Fees: ', $fee, false );
add_action( 'woocommerce_cart_calculate_fees','coupon_add_cart_fee' );

This code is tested and it works. It goes on function.php file of your active child theme or theme.

TAX OPTIONS with add_fee() method

IMPORTANT: The fact that TAX is working or not with add_fee() method depends first of your tax settings in woocommerce.

Class WC_Cart add_fee() method, adds additional fee to the cart.

add_fee( string $name, float $amount, boolean $taxable = false, string $tax_class = ''  )> <!-- language: lang-css -->

    $name      Unique name for the fee. Multiple fees of the same name cannot be added.
    $amount    Fee amount.
    $taxable   (default: false) Is the fee taxable?
    $tax_class    (default: '') The tax class for the fee if taxable. A blank string is standard tax class.