How to Set All Shipping Methods’ Costs to Zero Based on Cart Total Amount in WooCommerce?

An easy solution to adjust the displayed shipping costs as”free” when the cart total is greater than or equal to a certain amount by using this handy code snippet given below.

function ts_filter_woocommerce_package_rates( $rates, $package ) {
    // Cart total amount (integer)
    $cart_total = WC()->cart->cart_contents_total;

    // Greater than or equal to
    if ( $cart_total >= 59.99 ) {
        foreach ( $rates as $rate_key => $rate ) {
            // For "free shipping" method, do not remove it
            if ( $rate->method_id != 'free_shipping' ) {
                // Append rate label titles (free)
                $rates[$rate_key]->label .= ' ' . __( '(free)', 'woocommerce' );

                // Set rate cost
                $rates[$rate_key]->cost = 0;

                // Set taxes rate cost (if enabled)
                $taxes = array();

                foreach ( $rates[$rate_key]->taxes as $key => $tax ) {
                    if ( $rates[$rate_key]->taxes[$key] > 0 ) {
                        $taxes[$key] = 0;
                    }
                }

                $rates[$rate_key]->taxes = $taxes;
            }
        }
    }

    return $rates;
}
add_filter( 'woocommerce_package_rates', 'ts_filter_woocommerce_package_rates', 10, 2 );

Output

The output shows that the label of shipping option costs are replaced as ‘free’ when the cart total is greater than or equal to $59.99.

Additionally, you can set all shipping methods cost to zero for a free shipping coupon in WooCommerce where this feature is especially useful in clearance sale offering both free shipping and coupon discounts.