In the world of online casinos, RTP is arguably the single most important mathematical statistic a player can understand.

Understanding how RTP functions allows you to make incredibly informed decisions about where to risk your money.
What Exactly Does RTP Mean?
If a slot machine has an RTP of 96%, it is programmed to return $96 for every $100 wagered into it.

The remaining 4% is kept by the casino, representing their guaranteed profit margin, known as the house edge.
RTP does not indicate how often you will win, only the payout volumeOnline casinos generally offer significantly higher RTPs than physical venuesYou can usually find the RTP listed in the game's help menu RTP vs. Variance (Volatility)
Two games can both have an identical RTP of 96% but behave entirely differently during a gaming session.

A low variance slot will pay out small amounts very frequently, keeping your bankroll highly stable.
Maximizing Your RTP Advantage
If the casino hides this information, you can simply search the name of the slot on any major review website.

As a general rule, avoid playing any online slot machine that offers an RTP below 95%.
Game TypeAverage RTPVolatilityOnline Video Slots95% - 97%Variable (Low to Extreme)Land-Based Slots85% - 92%Variable
Ignoring RTP is the fastest way to lose your money without understanding why the session went so poorly.