Every online slot publishes a figure called RTP, short for return to player, usually expressed as a percentage somewhere in the high nineties. It is one of the few genuinely objective numbers in a casino, and it is also one of the most consistently misread.
The misreading is understandable. A 96% RTP sounds like a promise that you will get 96% of your money back, which would make an evening at a slot a modestly priced entertainment with a predictable cost. It is not a promise about your evening at all. This guide explains what the number actually measures, why it says almost nothing about any session you will personally play, and how to use it for the one thing it is good for. The games available at each operator are listed in our casino games section.
What RTP measures
RTP is the proportion of all money staked on a game that the game returns as winnings, calculated across the complete cycle of possible outcomes. A 96% RTP means that for every 100 units staked on that game, across everyone playing it, everywhere, over the game’s entire life, 96 are paid back out.
Two words in that sentence do the heavy lifting: everyone and entire life. The figure is a property of the game’s mathematical design, verified by the provider and usually by an independent testing house. It is not a property of your account, your session or your luck.
It is also calculated on total turnover, not on deposits. If you deposit 100 and stake it fifteen times over as winnings are recycled, the RTP applies to the 1,500 you staked, not to the 100 you put in. This is the single largest reason the number feels wrong to people afterwards.
How long the long run really is
The theoretical return is reached over a sample that is far larger than most people imagine. Slots are high variance instruments, and the number of spins needed before observed return settles anywhere near the stated figure is typically measured in the hundreds of thousands, not the hundreds.
A normal session is a few hundred spins. At that sample size the outcome is dominated almost entirely by variance, and the RTP of the game barely influences what you see. Two players on the same 96% machine on the same evening can finish up several hundred percent and down one hundred percent, and both results are entirely ordinary.
This is why RTP is not a budgeting tool. Expecting to lose 4% of your turnover on any given night is not a reasonable expectation; it is the average of an enormous number of nights, almost none of which look like it.
RTP and house edge are the same number
House edge is simply 100% minus RTP. A 96% game has a 4% house edge, which is the share of turnover the operator expects to retain over that same enormous sample.
This matters because house edge is the figure that makes bonus arithmetic work. The expected cost of clearing a wagering requirement is the required turnover multiplied by the house edge of the game you play, so a game’s RTP directly determines whether an offer is worth taking. Our guide to wagering requirements sets out that calculation, and it is the one context where RTP earns its keep.
| Game RTP | House edge | Expected cost of $5,000 turnover |
|---|---|---|
| 98% | 2% | $100 |
| 96% | 4% | $200 |
| 94% | 6% | $300 |
| 88% | 12% | $600 |
Those are expectations across a very large sample, not predictions for one attempt. The ranking they produce, however, is reliable: the higher RTP game costs less to play through, every time.
Why two 96% games feel nothing alike
RTP says how much comes back. It says nothing about the shape in which it comes back, and that shape is volatility.
A low volatility 96% game returns small amounts often, so a balance drifts slowly and sessions last. A high volatility 96% game returns almost nothing for long stretches and occasionally pays a very large amount. Over a lifetime both return 96%. Over an evening they are completely different experiences, and the high volatility one will empty most balances before the large payout arrives.
If a session is going badly on a high volatility game, nothing is malfunctioning. That is what high volatility is. Choosing a game on RTP alone, without looking at volatility, is choosing on the less relevant of the two numbers.
Where to find the RTP of a game
The figure is published by the game provider, not by the casino. The usual places:
- The information or help panel inside the game itself, often behind an “i” icon.
- The paytable, usually on the last screen.
- The provider’s own website for that title.
If a game does not publish its RTP anywhere and the provider is not one you can look up, that absence is itself worth noting. Established providers publish this figure because testing houses require it.
The same game can have different RTPs
A detail that surprises people: many providers ship a single title in several RTP configurations, and the operator chooses which one to run. The game looks identical, the name is identical, and the returns are not.
The practical consequence is that the RTP quoted on a review site or on the provider’s page is not necessarily the RTP of the version you are playing. The authoritative figure is the one shown in the game’s own information panel on the site you are playing at, and checking it there takes a few seconds.
Four common misreadings
- “I will get 96% of my deposit back.” RTP applies to total turnover, not to deposits, and recycled winnings are staked repeatedly.
- “This machine is due.” Each spin is independent. A game that has paid nothing for two hours is exactly as likely to pay on the next spin as it was on the first.
- “It paid out a lot, so it will be tight now.” Same error, reversed. The game does not track what it owes.
- “A 97% game is safer than a 94% game.” Over a session, no. Volatility decides how a session feels; RTP only decides the long run average.
The second and third are the gambler’s fallacy, and knowing the term is not much protection because the feeling is produced by the pattern rather than by a belief you can argue with.
How to actually use RTP
RTP is useful for exactly two things, and misleading for everything else.
- Comparing two games you were going to play anyway. Between two similar titles, the higher RTP costs less over time. This is a real and free improvement.
- Working out what a bonus will cost to clear. Turnover multiplied by house edge, using the real RTP of the game you intend to play.
What it cannot do is tell you what tonight will look like, how long a balance will last, or whether a game is about to pay. For those questions the honest answer is that nobody knows, including the operator.
RTP is a long run average across the whole population of players, calculated on turnover rather than deposits, and reached over hundreds of thousands of spins. It tells you nothing about your session. Use it to compare two similar games and to calculate the cost of clearing a bonus, check it in the game’s own information panel because operators can run different versions, and look at volatility for any question about how a session will actually feel.
Volatility is covered in its own guide, and the casino games section explains the main formats you will meet.
18+ only. This article is general information and is not legal or financial advice. Gambling involves risk and you should only play with money you can afford to lose. Free and confidential support is available internationally through organisations such as GamCare and Gambling Therapy.