It is the expected payback of the game over time. Return to Player (RTP): A Single Outcome Sourceįor simpler scenarios, Return to Player (sometimes seen as Theoretical RTP) does the trick. The reason there’s two statistics giving the same basic info is simply because machines can be in two forms – a single game machine with one payback setting, where the payback is set to payback on all options, or a machine with multiple games (or one game with multiple denominations), where the payback may not be consistent across all choices. Slot machines are generally programmed to have many thousands (or even millions) of outcomes, and over millions of spins the expected outcomes will slowly converge on this statistic. Both Calculations Give the Same Infoīoth calculations are used for different purposes, but they’re designed to provide the same basic understanding: What percentage of wagers, over time, are theoretically expected to be paid to the player in the form of winnings on wagers. In today’s post I’m going to talk about two statistics that provide similar info, but take different factors into account: Return to Player (RTP) and Weighted Average Theoretical Payback (WATP). The more mathematically inclined among us find slot machine math interesting, and aim to know a bit more about how it all works.