Payback (2015) was a professional wrestling pay-per-view (PPV) event produced by WWE. It took place on May 17, 2015, at the Royal Farms Arena in Baltimore, Maryland. It was the third event under the Payback chronology, and the first Payback held outside of the Chicago suburb of Rosemont, Illinois. Payback was available for free to new subscribers on WWE's monthly subscription service, the WWE Network in over 140 countries.

Nine matches took place at the event, with two matches on the pre-show. In the main event, Seth Rollins defeated Roman Reigns, Dean Ambrose and Randy Orton in a Fatal 4-Way match to retain the WWE World Heavyweight Championship. The event has sold 54,000 buys (excluding WWE Network views), down from the previous year's 67,000 buys.

The professional wrestling matches at Payback featured professional wrestlers performing as characters in scripted events pre-determined by the hosting promotion, WWE. Storylines between the characters played out on WWE's primary television programs, Raw and SmackDown.