National Hamburger Day 2026 falls on Thursday, May 28, and this yearâs deals are not limited to one-day coupons. Several restaurant chains have stretched the celebration across the final week of May, giving customers more than one way to claim a free burger, cheaper meal or app-only discount.
For anyone planning to order, the main thing to know is that most of the best offers require either a rewards account, a mobile app, a promo code or a minimum purchase. That makes checking the terms before checkout important, especially because participation can vary by location.
Best National Hamburger Day 2026 deals
Shake Shack has been running one of the strongest burger promotions of the month. The chain is offering a free single burger each week in May with a minimum purchase of $10. For the final week around National Hamburger Day, customers can claim a free ShackBurger by ordering through the Shack App, online or at an in-restaurant kiosk and using the code FREEBURGER. Earlier May offers included the ShackBurger, SmokeShack and Bacon Cheeseburger, giving regular customers a rotating set of free-burger options across the month. Shake Shack also promoted a free Chicken Shack on Sundays with a qualifying $10 purchase.
Sonic Drive-In is keeping its offer active beyond the holiday itself. From May 4 through May 31, customers can get a free Sonic Smasher or All-American Smasher with a $5 purchase. Sonic is also pairing the burger deal with half-priced small classic shakes in chocolate, vanilla and strawberry, plus $2 snacks such as soft pretzel twists, premium chicken bites and corn dogs.
Dairy Queen is taking a week-long discount approach instead of a one-day giveaway. Customers can save $1 on any Signature Stackburger, including the FlameThrower Signature Stackburger, Bacon Cheese Deluxe Signature Stackburger, Cheese Deluxe Signature Stackburger, Backyard Bacon Ranch Signature Stackburger and Original Cheeseburger Signature Stackburger.
Burger Kingâs offer is aimed at Royal Perks members. On May 28, members can get a free hamburger with any purchase of $3 or more at participating U.S. restaurants. The chain is also offering a Whopper for $3.98 before taxes and fees when redeemed through a Royal Perks account in the BK App.
Jack in the Box is offering one of the simplest low-price deals of the day. Customers can buy $1 hamburgers after 2 p.m. on May 28, both in stores and online. The offer is limited to five hamburgers per order.
Wayback Burgers is selling its Classic Burger for $5 on May 28. The deal is available in restaurants, online and through the Wayback Rewards program. Smashburger is also joining the holiday push with a single burger for $5.28 when customers use the checkout code 528SINGLE.
How to claim the deals without missing out
The easiest way to avoid problems is to check each restaurantâs app before ordering. Shake Shack requires the code FREEBURGER, Sonic requires a $5 purchase, Burger King requires a Royal Perks account, and Smashburger requires the code 528SINGLE. Some offers are online-only, while others work in stores, so customers should confirm local availability before heading out.
These promotions also show how fast-food chains are leaning harder on loyalty programs and short-term value deals. Restaurant brands are trying to keep price-conscious customers engaged with limited offers, app coupons and reward-member perks, especially as diners continue watching everyday food costs. Similar savings-focused restaurant offers have appeared recently, including Memorial Day food deals and Whataburgerâs $3-$4-$5 menu.
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For National Hamburger Day 2026, Shake Shack and Sonic stand out for longer-running free burger deals, while Jack in the Box, Wayback Burgers and Smashburger offer some of the lowest direct prices. Burger King and Dairy Queen may be better choices for customers already using rewards apps or planning a larger order. Official details are available through Shake Shack, while a wider deal roundup was reported by People.
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