Offer valid only from 4/28/26-4/30/26 at participating US Smashburger® retail locations. Offer available for purchases made in-store or online through smashburger.com or Smashburger® app during regular business hours. Store hours may vary. Offer to receive a $4 discount on your order when you make a minimum purchase of $20 (before taxes). For in-store orders, must mention offer at checkout to redeem offer. To redeem offer online, must enter promo code 4off20 at checkout.  Limit of one (1) offer per transaction. Not applicable to any applicable sales tax. Cannot be used in conjunction with any other offer, promotion, or discount. Not valid on previous purchases. Not valid on catering orders or orders with third party delivery. No cash value (unless prohibited by law, then cash value is $.005). No substitutions. No rainchecks. Company reserves the right to withdraw or change the offer’s terms and conditions at any time, at Smashburger’s discretion, and without notice. While supplies last. © 2026 Smashburger IP Holder LLC. All rights reserved.