Some of our Coupons can be combined while others can't. Since our coupon system can handle many situations, the best way to know is to add the coupon during checkout and our system will notify you if a coupon is usable. Below are some examples of possible situations you might encounter: Example 1... Sitewide Promotion for "Free Shipping". Have a "30% Off" Coupon code. This coupon can be combined. Your cart is eligible for "Free Shipping" and an additional "30% Off" Example 2... Sitewide Promotion for "30% Off". Have a "30% Off" Coupon code. This coupon cannot be combined. Your cart is only eligible for one "30% Off" discount.