Return to Player (RTP)
Return to Player (RTP) in iGaming is the theoretical percentage of a casino game's long-term payout relative to the amount wagered over time.
This means that a slot with a 96% RTP has a theoretical long-term return of EUR 96 for every EUR 100 wagered across millions of game rounds, while the remaining 4% represents the casino's theoretical advantage.
RTP represents a theoretical expectation rather than the outcome of an individual gaming session. It applies to the total amount wagered, not to a player's starting balance or deposit. Winnings can be wagered again, so the total stake over time may exceed the original deposit. An example: a player deposits EUR 100 and repeatedly places EUR 1 bets, using returned winnings to continue playing. If those wagers total EUR 100, a game with a 96% RTP has a theoretical return of EUR 96. Actual results, however, may be significantly higher or lower because every game outcome is determined independently.
Outcomes are generated by a Random Number Generator (RNG), meaning individual gaming sessions rarely match the published RTP. Only over a very large number of game rounds do observed results tend to approach the theoretical RTP.
RTP is verified by independent testing laboratories through mathematical analysis and extensive game simulations, confirming that a game’s actual performance aligns with its mathematical design before release.
RTP Vs House Edge and Volatility in iGaming
RTP in iGaming is closely related to house edge, but the two metrics describe the same mathematical expectation from different perspectives: house edge represents the casino's expected long-term advantage and is calculated as 100% minus RTP. Using the example above, a game with a 96% RTP has a 4% house edge. In many games, the published RTP also includes contributions from the base game, bonus features, and jackpot mechanics, providing an overall expected return across all gameplay elements.
RTP should also not be confused with volatility, which describes how frequently prizes are awarded and how large those prizes tend to be. Two games can have the same RTP but deliver very different playing experiences because of their volatility.
How to Calculate RTP
(Win Sum ÷ Bet Sum) × 100
