What Is RTP? A Beginner’s Guide to Return to Player
RTP, or Return to Player, is the percentage figure that tells you how much a casino game pays back to players over the long run. A 96% RTP slot returns £96 of every £100 wagered across millions of spins; the casino keeps the other £4. The figure is theoretical, not a session-by-session promise. This guide covers how RTP works, what counts as a good number, the myths that catch UK players out, and how to check the actual RTP of any game before you play.
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1. What Is RTP?
RTP stands for Return to Player. It’s a percentage that tells you how much of the total money wagered on a casino game is theoretically paid back to players over time.
For example, a slot with a 96% RTP returns, on average, £96 of every £100 wagered across all players over millions of spins. The casino keeps the other £4.
The figure is calculated over millions of game rounds, not your individual session. In practice, you might play a 96% RTP slot for an hour and win nothing, or hit a big payout on your third spin. RTP doesn’t predict what will happen to you. Instead, it describes what happens to everyone over a very long period.
Ultimately, RTP is a long-term average, not a promise. It’s good for comparing games, but it won’t tell you whether your next session will be profitable.
2. How Is RTP Calculated?
The formula:
RTP = (Total Amount Returned to Players ÷ Total Amount Wagered) × 100
Game developers calculate this during design using mathematical models and simulations that run millions, sometimes billions, of rounds. The result is a theoretical percentage representing what the game is expected to pay back over its lifetime.
Before any game goes live at a UK casino, independent testing agencies verify the maths. The main ones you’ll see are:
- eCOGRA – a UK-based testing agency, established in 2003, that certifies game fairness and payout accuracy.
- GLI (Gaming Laboratories International) – tests and certifies games across 480+ jurisdictions worldwide.
- iTech Labs – an Australian-founded lab with offices across Europe and Asia, specialising in RNG and RTP verification.
These agencies test the random number generator (RNG) and confirm the actual payout behaviour matches the claimed RTP. In addition, UKGC-licensed casinos face ongoing audits to confirm games continue performing as certified. For more on how the UKGC enforces these standards, see our guide to the UK Gambling Commission.
3. What Counts as a Good RTP?
Here’s how we’d classify RTP ranges:
| RTP Range | What It Means |
|---|---|
| 97% and above | Excellent. Among the highest-paying games available, and harder to find. |
| 95% – 96.99% | Average to good. Where most online slots and table games sit. |
| 93% – 94.99% | Below average. The casino keeps a larger share. Common in progressive jackpot slots. |
| Below 93% | Low. These games carry a high house edge. Pub and service station fruit machines often fall here. |
One thing that catches most players off guard: there’s no minimum RTP floor for online slots in the UK. Unlike some other jurisdictions, the UKGC doesn’t require games to meet a minimum payout percentage. For example, an operator could legally offer a slot with an RTP of 84%, as long as the figure is disclosed.
Therefore, checking the RTP yourself matters. For a ranking of the highest-paying slots currently available at UK casinos, see our best RTP slots guide.
Since April 2025, the UKGC has capped online slot stakes at £5 per spin for players aged 25 and over, and £2 per spin for those aged 18-24. As a result, the practical impact of RTP changes at lower stakes: the same house edge costs you less per spin in absolute terms.
4. RTP Across Different Casino Games
Every casino game has an RTP, not just slots. Here’s how the main game types compare:
| Game Type | Typical RTP Range | Notes |
|---|---|---|
| Blackjack | 99.0% – 99.5% | Requires basic strategy. Without it, effective RTP drops significantly. |
| Video poker | 97% – 99.5% | Depends heavily on the variant and whether you play optimal strategy. |
| Baccarat | 98.5% – 98.9% | Banker bet has the best RTP. Tie bet is much worse (around 85%). |
| European roulette | 97.3% | Fixed by the single zero. No strategy changes this. |
| American roulette | 94.7% | The double zero nearly doubles the house edge versus European. |
| Online slots | 92% – 99% | Widest range. Average is around 96%. Progressive jackpots are lower. |
| Live game shows | 90% – 96% | Varies enormously by game and bet type. Some side bets have very low RTP. |
| Pub / service station slots | 70% – 90% | Significantly lower due to regulatory differences and higher overheads. |
If pure RTP is your priority, table games like blackjack and baccarat offer the best mathematical returns. However, they require knowledge and discipline to play optimally. By contrast, slots offer more variety and entertainment but come with a wider range of payout rates. For a closer look at the pub-versus-online comparison, see our pub vs online slots RTP guide.
5. RTP vs House Edge
RTP and house edge are the same maths from opposite sides of the table:
House Edge = 100% – RTP
For example, if a game has a 96% RTP, the house edge is 4%. That’s the casino’s theoretical profit margin: the percentage of every pound wagered the casino expects to keep over the long run.
- RTP tells the story from the player’s perspective. How much comes back to you.
- House edge tells the story from the casino’s perspective. How much they keep.
Neither number is “better” to use. In fact, they’re mathematically identical, just framed differently. A game described as having a “low house edge” is the same as one with a “high RTP”.
6. RTP vs Volatility
This is where players often get tripped up. RTP tells you how much a game pays back. Volatility (also called variance) tells you how it pays back.
| Volatility Level | What It Means in Practice |
|---|---|
| Low volatility | Frequent small wins. Your balance stays relatively steady. Good for longer sessions on a small bankroll. |
| Medium volatility | A mix of small and medium wins. The most common type. |
| High volatility | Rare but larger wins. Long dry spells followed by significant payouts. Requires a bigger bankroll and more patience. |
For example, two slots can have the same RTP but feel completely different to play. A 96% RTP low-volatility slot might pay you small amounts every few spins. By contrast, a 96% RTP high-volatility slot might pay nothing for 200 spins, then hit a 500x win.
Therefore, always check both RTP and volatility before choosing a game. A high RTP with high volatility isn’t a “safe” game. It’s a high-risk game that theoretically returns more over millions of spins. For more on this, see our guide to high variance slots.
7. Common RTP Myths
RTP gets misunderstood a lot. Below are the myths we hear most often, and the reality behind each one.
Myths about your personal results
- “A 96% RTP means I’ll get £96 back from every £100” – No. In fact, RTP is calculated over millions of rounds across all players. In any given session, you might win £500 or lose everything. RTP describes the long-term mathematical average, not your personal outcome.
- “Higher RTP means I’ll win more often” – Not necessarily. For example, a high-RTP, high-volatility slot might pay out rarely but in large amounts. By contrast, a lower-RTP, low-volatility slot might pay out frequently in small amounts. Winning frequency is determined by volatility, not RTP.
- “A slot that hasn’t paid out in a while is ‘due’ for a win” – This is the gambler’s fallacy. Every spin is independent. In fact, the random number generator doesn’t know or care what happened on previous spins. A slot that’s been “cold” is no more likely to pay out than one that just hit a jackpot.
- “RTP applies to my session” – It doesn’t. Instead, RTP is a statistical property of the game over its entire lifetime. Your individual session could be wildly above or below the theoretical RTP, and that’s completely normal.
Myths about how casinos handle RTP
- “The RTP is the same at every casino” – This is the myth that catches most players off guard. Many game providers, including Play’n GO (one of the UK’s most popular), offer operators a choice of RTP tiers. Specifically, Play’n GO games can be configured at roughly 96%, 94%, 91%, 87%, or 84%. The operator chooses, and there is currently no UKGC requirement to disclose which tier is active. As a result, the 96.21% you see on a review site or the provider’s website may not be the RTP your casino is actually running.
- “Casinos can change the RTP during play” – They can’t. The RTP is set in the game’s configuration and verified by independent testing agencies. However, what operators can do is select which RTP tier to deploy when they add a game to their site. Once it’s live, the setting doesn’t change mid-session or based on your results.
The variable-tier myth above matters most for UK players right now. Until the UKGC requires casinos to disclose which RTP tier they’re running, the best you can do is check the RTP inside the game itself. Therefore, the next section covers how.
8. How to Check a Game’s RTP
Because of variable RTP tiers, checking the actual RTP of any game matters before you play:
- Open the game and check the info screen – Most slots have an “i” button or a help/rules section. The RTP displayed here should reflect the configuration your casino is running. It’s the most reliable source.
- Cross-reference with the provider’s website – Game developers usually publish the RTP on their official product pages. Remember that this is typically the maximum RTP tier; your casino may be running a lower setting.
- Check the casino’s game rules page – Some operators list RTP values for all their games in a dedicated section. If your casino does this, compare it to the in-game display and the provider’s website.
- Use an RTP database – Our RTP slots database lists payout percentages for popular UK titles. It’s a useful starting point. Always verify against the in-game display at your specific casino.
- If in doubt, ask customer support – You have every right to ask a casino what RTP tier they’re running on a specific game. If they can’t or won’t tell you, that’s worth noting.
In short, always check the in-game info screen before you play. It takes five seconds, and you’ll know exactly which tier is live at your casino.
9. Frequently Asked Questions
We answer the most common questions UK players ask about Return to Player.
10. Sources & Further Reading
- UKGC RTS 3 – Rules, Game Descriptions and the Likelihood of Winning
- UKGC – Live RTP Performance Monitoring Guidance
- UKGC – How to Calculate RTP
- eCOGRA – Independent Testing & Certification
- Best RTP Slots – Full Database & Rankings – BestCasino.co.uk
- Pub vs Online Slots RTP Comparison – BestCasino.co.uk
- High Variance Slots Guide – BestCasino.co.uk
- Online Slots Strategy Guide – BestCasino.co.uk