Happy National Burger Month! Shake Shack is shaking up National Burger Month with a juicy deal every week in May for burger lovers. The chain’s burgers are made with a custom 100% Angus beef blend, never frozen, no hormones or antibiotics ever, humanely raised and grazed in the U.S. You will definitely want to make Shake Shack a stop for lunch or dinner this month!
Photo: Shake Shack
From May 1 to 31, 2026, Shake Shack is offering a different single burger for FREE each week with a $10 minimum purchase at participating locations.
The offer excludes all paid add-ons such as extra avocado or bacon.
Here’s what burger is available each week:
May 1 to 10 – ShackBurger
May 11 to 17 – SmokeShack
May 18 to 24 – Bacon Cheeseburger
May 25 to 31 – ShackBurger
The offer is only valid for purchases placed at a kiosk in-restaurant or for delivery or pick-up via the Shake Shack app or at shakeshack.com. Use promo code FREEBURGER at checkout. (Note: Promo code must be entered in ALL CAPS.)
Limit one offer per order — with a maximum savings equal to the price of each week’s promotional burger (from $8.29 to $10.49). If you have a large order, consider breaking it up into separate transactions for more FREE burgers.
You must add at least $10 worth of food and/or drinks to your order, excluding the cost of the complimentary burger. (Gift card purchases are also excluded.)
Review the terms of the offer here.
There are 9 locations in Colorado — Boulder, Castle Rock, Colorado Springs, Denver (3), Greenwood Village, Highlands Ranch and Lone Tree.
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