RTP, short for return to player, is printed on almost every online slot and quoted in almost every casino review. It is also one of the most misread numbers in gambling. A 96 percent RTP does not mean you will get 96 back from every 100 you stake tonight. It means something narrower and more useful, once you know how to read it.
What RTP means
If a game has a 96 percent RTP, then across millions of bets it is designed to pay back 96 units for every 100 wagered and keep the other 4. That 4 percent is the house edge. The two numbers are the same measurement from opposite sides:
RTP = 100 percent minus the house edge
House edge = 100 percent minus the RTP
How RTP is worked out
For a table game, RTP comes straight from the probabilities. European roulette has 37 pockets and pays 35 to 1 on a single number, so a 1-unit bet returns 36 units one time in 37 on average: 36 divided by 37 is an RTP of about 97.3 percent.
For a slot, the game designer sets the symbol weights and paytable, and the RTP is calculated across every possible outcome. In regulated markets, independent test labs check that the machine's real behaviour matches the published figure.
Why RTP does not predict a session
RTP is an average over an enormous number of bets. Over a few hundred spins, luck swamps it. The same 96 percent slot can turn 100 units into 300 or into nothing in an evening, and both are perfectly consistent with its RTP. The number becomes reliable only as the total amount wagered grows very large, which is why casinos can count on it and individual players cannot.
RTP and volatility are different things
Two games with the same RTP can feel completely different. Volatility describes how the return is paid out:
Low volatility games pay small wins often. Sessions are smoother and longer.
High volatility games pay rarely but big. Most sessions lose, and a few win large.
RTP tells you the price. Volatility tells you the ride. Most players should look at both.
Typical RTPs by game
Game | Typical RTP |
|---|---|
Blackjack, basic strategy | 99.5% |
Baccarat, banker | 98.9% |
European roulette | 97.3% |
American roulette | 94.7% |
Online slots | 94% to 97% |
Crypto dice and crash | 97% to 99% |
Keno | 65% to 80% |
Stack.bet | 100% base, perfect play |
Can RTP change?
For the same game, sometimes. Many slots are released with several RTP settings, and the operator chooses which to run, so the same title can have a different RTP at two different sites. The game's information or help screen should state the version you are playing. Table games change RTP when the rules change: a blackjack table paying 6 to 5 instead of 3 to 2 has a noticeably lower RTP.
What a 100 percent RTP game is
A 100 percent RTP means the base maths of the game keeps nothing: over the long run it pays back everything wagered. That is rare, because it leaves no built-in margin for the operator.
Stack.bet is built that way. Its live configuration sets the house edge to zero on every one of its 30 tiles: each tile's chance of surviving, multiplied by its growth multiplier, equals exactly 1. The full risk table is published before you play, and why Stack.bet has zero percent house edge walks through the arithmetic.
Two things still stand between a player and that 100 percent. The first is variance: a 100 percent RTP game still produces losing sessions. The second is your own play. Stack.bet is skill gambling: each tap is graded, and grades below Perfect add bust risk, so a player's real return depends on their placement accuracy. Modelled on the live configuration, cashing out at tile 10 returns 100 percent with perfect placement and about 36 percent tapping Good every time.
Common questions about RTP
Is a higher RTP always better?
For the long-run price of the game, yes: a higher RTP means less is kept on average. For your experience, volatility matters too, so compare both.
What is a good RTP for a slot?
Online slots commonly sit between 94 and 97 percent. Anything at the top of that range is good for a slot, though table games and some crypto originals return more.
Does RTP apply to each session?
No. It is an average over a huge number of bets. Individual sessions can finish far above or below it.
What does 100 percent RTP mean?
That the base maths returns everything wagered over the long run and keeps no margin. Variance still applies, and on skill games your own play can lower your personal return.
How is RTP different from hit rate?
Hit rate is how often a bet wins anything. RTP is how much is paid back in total. A game can hit often and still have a low RTP if the wins are small.
Playing responsibly
RTP describes the price of a game, not a way to win it. Set a budget before you play, treat it as the cost of the entertainment, and use the limits, cooldowns and self-exclusion controls if you need them.