RTP meaning in a casino

What RTP means in casino games

Return to player is a design figure. When a studio builds a slot or an electronic table game, it sets the paytable and the probabilities so that, across an enormous sample of play, a known percentage of stakes flows back to players as wins. That percentage is the RTP. Everything else, from bonus rounds to jackpots, is accounted for inside it. For the full story of how studios set and certify the number, read our longer guide, RTP explained; this glossary entry focuses on the definition and on reading the figure correctly.

Two things follow from that definition. RTP describes the game, not the casino, and it describes the very long run, not tonight. A 96% game can return 300% of your stakes in one sitting or nothing at all.

Return to player in pounds: three worked examples

The easiest way to read an RTP is to turn it into an expected cost per amount staked. Multiply total stakes by (100% − RTP).

Note that ‘total stakes’ is not the same as your deposit. If you deposit £50 and keep re-staking your wins, you might put £500 through a slot in an evening. At 96% the expected cost of that turnover is £20, though the real result will scatter widely either side. This is the same idea as house edge, seen from the player’s side.

Published RTP of well-known UK slots

Studios publish a default figure for each game. These are the standard published numbers for some familiar titles; casinos can run a different version, so treat the help screen as the final word.

The spread between 95% and 96.71% looks small, but on £1,000 of play it is the difference between an expected cost of £50 and £32.90. Our guide to high RTP slots and the question what is a good RTP put those gaps in context.

Why the same game can show a different RTP

Many studios supply a game in several settings, for example a top version and lower ones a few points beneath it. The operator picks which to offer. That is why two casinos can host the ‘same’ slot with different returns, and why our pages always say the help screen shows the live figure. The RTP range entry explains how studios describe these sets.

1. Open the game and look for an ‘i’, ‘?’ or menu icon.
2. Find the rules or paytable page and scroll to the section on theoretical return.
3. Note the exact percentage, including decimals.
4. If a jackpot contributes, check whether the figure includes it.
5. Compare with the studio’s published default if you want to know whether a lower version is running.

Our step-by-step guide on how to check slot RTP covers where each major studio puts this information, and the RTP display rules page explains what UK operators have to show.

Common misreadings of RTP meaning

• ‘A 96% slot gives me back £96 if I deposit £100.’ It does not. The figure is an average over all players and millions of rounds.
• ‘The game is due to pay because it has been cold.’ Each spin is independent; past results do not raise the next win’s odds. See the gambler’s fallacy.
• ‘Slots loosen at night or on quiet days.’ A certified game cannot switch RTP with the clock. Our answer to whether slots pay more at night explains why.
• ‘Higher stakes earn a higher RTP.’ On most slots the percentage is fixed regardless of stake; a few older titles vary with bet size, and the help screen says so if they do.

How RTP links to randomness and testing

The return figure is only meaningful if results are genuinely random. A random number generator picks each outcome, and the maths model maps those numbers to symbols and payouts so that the long-run return matches the declared figure. Licensed operators must meet the Gambling Commission’s remote gambling and software technical standards (opens in a new tab), and games are checked by independent labs before release; see how casino games are tested.

RTP and UK rules for slots and casino games

RTP sits alongside other UK protections rather than replacing them. Since 31 October 2021 slots must take at least 2.5 seconds per spin, offer no autoplay and show your net position; since 17 January 2025 similar design rules cover other online casino games, with a 5-second minimum game cycle. Online slot stakes are capped at £5 a spin for players aged 25 and over and £2 for those aged 18–24. The Commission’s summary of the 2021 game design changes (opens in a new tab) sets out the exact wording. None of these changes a game’s RTP, but slower, smaller play means less turnover, and less turnover means a smaller expected cost. The latest slot rules page has the full timeline.

Putting RTP to use with current spins offers

Spins offers make RTP tangible. PlayOJO gives new UK customers aged 18+ (excluding Northern Ireland) 80 free spins on Big Bass Bonanza at 10p each with a first deposit of £10 or more; that is £8 of spins on a slot published at 96.71%, so the average expected return is about £7.74, paid as cash with no wagering. The offer can’t be combined with others and must be claimed through the designated link; read the PlayOJO bonus terms.

Coral gives new players aged 18+ 100 free spins at 10p (£10 of spins) after a deposit and a £10 slots bet, on selected games, with no wagering on spin winnings; accept within 48 hours and use within 7 days. Deposits through PayPal, Neteller, Skrill, Paysafe, prepaid cards or certain debit cards won’t trigger it, and it is open from 1 October 2026 until 1 February 2027. Both offers were checked on 5 October 2026; full terms apply, and Coral’s free spins page has the detail.

18+. Gambling should be entertainment that costs money, not a way to make it. Set a deposit limit before you play: how to set deposit limits. Free, confidential help: National Gambling Helpline 0808 8020 133.