It happened around 3:30 a.m. at Bob's Check Cashing on the 2700 block of Kensington Avenue.
Police say the burglar broke through the roof and climbed into the business through a utility closet.
Once inside he stole an unknown amount of counterfeit money that the business had collected over the years, along with a 12 gauge shotgun with a pistol grip.
The suspect is described as a white or Hispanic male with a thin build. He was wearing a white and black striped hooded sweatshirt, burgundy sweatpants and black and white sneakers.
Anyone with information on this burglary is asked to call police at 215.686.TIPS (8477) or text a tip to PPD TIP or 773847.
Tips will remain confidential.
VIDEO: Click here to watch the surveillance video