GrubbHub always offer some great coupons, free delivery, and special deals to new and old customers. First-time users are usually offered a discount of $7, $10, or even $12. There are also promotional codes for new app users. Furthermore, there are many other discounts that you can take advantage of, including percentages or amount off on pickup orders, free appetizers, discounts from local restaurants on Grubhub, etc. To use these coupons, simply copy and paste the promo codes into the corresponding box during the checkout process.