An RTP range is the set of return-to-player percentages a single slot is sold with, such as 96.71%, 95.67% and 94.62% for the same game. The developer offers several versions, each casino chooses which one to run, and the figure that applies to you is the one shown inside the game’s help screen in your app.
Many slots come in several RTP versions, and two apps can run different ones of the same game.
Developers usually publish the top figure, so a review quoting it may not match your casino.
A 2-point gap can raise the expected cost per £100 staked by more than half.
The live RTP is in the slot’s info or rules screen, normally a couple of taps from the spin button.
What it is
The set of RTP versions a slot is supplied in
Typical spread
Often 2–4 percentage points
Who chooses
The casino, from the developer’s list
Where to check
Game rules or info screen in the app
Also used for
Slots whose RTP changes with stake or level
What an RTP range means
RTP, or return to player, is the share of all money staked on a slot that the maths model pays back over a very long run. A 96% game is designed to return £96 for every £100 wagered across millions of spins, with the other £4 being the house edge.
Many developers build each slot in more than one maths configuration. The reels, symbols and features look identical; only the frequency or size of certain outcomes is tuned so the long-run return lands on a different figure. The collection of those figures is the game’s RTP range, and the casino picks which version goes live.
RTP range examples from popular slots
The figures below are the versions published for each game. Which one a given app runs is not something we can confirm from outside, so treat the top number as the best case rather than a promise.
Percentages feel small, so convert them into turnover. Imagine a session of 500 spins at 20p. That is £100 staked in total, even if your balance never drops much because wins are fed back in.
At 96.71%, the expected long-run cost of £100 staked is £3.29.
At 95.67%, it is £4.33.
At 94.62%, it is £5.38, about 64% more than the top version.
These are averages over enormous numbers of spins. In a single session on your phone, volatility swamps the difference: you could lose far more or end up ahead on any version. The RTP range matters most to people who play the same game regularly, because that is when the averages start to show.
When the RTP range sits inside one game
Some games publish a range for a different reason: the return changes depending on how you play. Rainbow Riches Pick n Mix and Reels of Gold list a return that varies with the stake chosen. Mega Joker reaches its highest figure only at the top stake with its Supermeter mode in use. In these cases the rules screen usually shows a small table linking each stake to its RTP.
This kind of range is visible to you and depends on your choices, unlike the casino-selected version, which you can only read, not change. Bear in mind the UK stake limit of £5 a spin (£2 for players aged 18–24) still caps how far up any stake ladder you can go.
How to find a slot’s live RTP in your app
The only figure that applies to you is the one inside the game in the casino you are using. Reviews, including ours, quote published figures that may differ.
Open the slot from the app’s lobby and wait for it to load fully.
Tap the menu icon (three lines) or the “i” button, usually beside or below the spin button in portrait.
Choose Rules, Game info or Help rather than Paytable.
Scroll to the bottom section, often headed Return to player or Theoretical RTP.
Note the figure, and if several are listed, read which stake or mode each belongs to.
Our longer guide on finding a slot’s RTP in an app covers the layouts used by different developers, and the paytable entry explains why the payout screen and the rules screen are separate.
Why the RTP range matters, and its limits
Knowing the range helps you compare like with like. If the same game shows 96.53% in one app and 94.51% in another, the first is the cheaper place to play that title over time. It also explains why figures in slot reviews and best payout casino app round-ups can disagree.
What it can’t do is predict a session. Even the top version keeps an edge for the casino, so losses are the likely outcome over time. Treat any slot as entertainment with a price, and use a deposit limit to set that price in advance.
Where to check RTPs before you play
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Frequently asked questions
What does RTP range mean on a slot?
It means the slot is supplied in more than one return-to-player version, and the casino chooses which to run. For example, Bigger Bass Bonanza is published at 96.71%, 95.67% and 94.62%. The game looks and plays the same in each case, but the long-run payback differs. The figure that applies in your app is the one printed in the game’s rules screen. Our RTP entry explains the underlying idea.
Do UK casino apps use lower RTP versions?
Some may, and it varies by casino and by game. UK operators are allowed to choose any certified version a developer offers, and they don’t have to run the highest one. The UK Gambling Commission requires the information to be available to you, which is why the figure sits in each game’s help screen. Checking it takes a few taps. See how to find a slot’s RTP in an app for the exact steps.
How much difference does a 2% RTP gap make?
On average, about £2 for every £100 you stake over the long run. At 96.5% the expected cost of £100 staked is £3.50, and at 94.5% it is £5.50. Because players often stake their balance several times over in one session, turnover adds up quickly: 500 spins at 20p is already £100. In a short session, luck dominates, but regular players of one game feel the gap. The house edge page puts these numbers in context.
Why does a review quote a different RTP from my app?
Reviews usually quote the developer’s headline figure, which is often the top version. Your casino may run a lower one, or the game may have a stake-dependent range. Neither means anything is wrong; it simply means the review describes the best case. Always trust the in-game figure over an outside source, including us. Our page on best payout casino apps explains how to compare games fairly.
Can a casino change a slot’s RTP while I’m playing?
No. A version is set when the game is installed on the casino’s platform, and every spin uses certified maths that can’t be adjusted for an individual player or session. A casino could switch to a different certified version later, which would then show in the rules screen. The random number generator decides each result independently. The RNG entry explains how results are produced and tested.
Is a higher RTP slot more likely to pay out today?
Not in any way you would notice in one sitting. RTP describes behaviour across millions of spins, while hit frequency and volatility shape what a single session feels like. A 96.7% high-volatility slot can go a long time without a meaningful win, while a 95% low-volatility one can pay small amounts often. Choose by the experience you want and set a budget; the house keeps an edge on every version.
Does an ante bet change the RTP range?
Sometimes the rules list a slightly different figure with an ante switched on, and sometimes they list the same one. Either way the change is small compared with the extra stake you pay on every spin, which raises the pounds you would expect to lose. Whether a slot offers an ante at all depends on the version installed. Read the ante bet entry for a worked cost example.
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