For first-time buyers, we have a "GRAB15" promo code that gives 5% off instantly and 10% more in Loyalty Program credits. Actually, the Loyalty Program is the best way to save big for returning customers. The thing is, for the money you pay for the orders, you get up to 15% back in credits on your personal account. Then, you can use the accumulated credits to pay the part or even the full cost of new orders. Another guaranteed way to get a discount is to place a large order: if it costs over $500, you get 5% off; if it costs over $1000, you get 10% off instantly.