This goes into your functions.php
/**
* Append delivery cost, even if free
* (People like free stuff)
*
* @param string $label
* @param WC_Shipping_Rate $method
* @return string
*/
add_filter('woocommerce_cart_shipping_method_full_label', 'my_woocommerce_cart_shipping_method_full_label', 10, 2);
function my_woocommerce_cart_shipping_method_full_label($label, $method)
{
if ($method->cost == 0) {
$label .= ': ' . wc_price($method->cost);
if ($method->get_shipping_tax() > 0 && WC()->cart->prices_include_tax) {
$label .= ' <small class="tax_label">' . WC()->countries->ex_tax_or_vat() . '</small>';
}
}
return $label;
}