Jack in the Box is celebrating Burger Week this year by offering its popular Smashed Jack for just $5 in-store and in the app daily through Sept. 18, 2025.
To score a $5 Smashed Jack, simply redeem the offer in the app or mention the deal at the counter at your nearest Jack in the Box.
In addition, on National Double Cheeseburger Day (September 15, 2025), you can buy one Jr. Cheeseburger and get one free on the Jack App, and on National Cheeseburger Day (September 18, 2025), you can get a free Jr. Cheeseburger with a $1+ purchase on the Jack App.
Jack in the Box’s Smashed Jack features a quarter‑pound smashed beef patty with crispy edges and a juicy center, topped with American cheese, grilled onions, pickles, and special sauce on a brioche bun.
The $5 Smashed Jack deal is available at participating Jack in the Box locations nationwide from September 12 through September 18, 2025.
