What Is RTP (Return to Player)?
RTP stands for Return to Player and is expressed as a percentage. It represents the theoretical proportion of all wagered money that a game is designed to pay back to players over a very large number of rounds. For example, an RTP of 96% means that for every £100 wagered across all players over time, £96 is returned in winnings.
It is critical to understand that RTP is a long-run statistical average, not a guarantee for any individual session. In a short session, your actual return could be much higher or much lower.
What Is House Edge?
House edge is the mathematical advantage the casino holds on every bet, expressed as a percentage. It is the inverse of RTP:
| RTP | House Edge |
|---|---|
| 96% | 4% |
| 98% | 2% |
| 95% | 5% |
| 88% | 12% |
A lower house edge means the game is theoretically less costly to play over time. A higher house edge means the casino retains a larger proportion of bets in the long run.
RTP by Game Type
Different types of casino games carry very different RTPs. Here are general ranges:
- Blackjack (optimal strategy): ~99% RTP — one of the lowest house edges available
- European Roulette: ~97.3% RTP (single zero reduces house edge versus American)
- Baccarat (Banker bet): ~98.9% RTP
- Video Poker (full-pay variants): Can exceed 99% RTP
- Online Slots: Typically 94%–97%, but varies widely by title and operator
- Keno / Scratch cards: Often 75%–85% — significantly higher house edge
Why Short Sessions Don't Reflect RTP
RTP is calculated over millions of rounds. In a 100-spin slot session, the actual outcome is dominated by variance, not RTP. You might win double your budget, or lose it all — both are consistent with a 96% RTP game. This is why RTP should inform your game selection, not your expectation for any single session.
Can Operators Change a Slot's RTP?
Yes. Many slot developers offer multiple RTP configurations to casino operators. The headline RTP published by a developer (e.g., 96.5%) may not be the version running on a particular casino. Reputable licensed casinos are required to disclose the RTP of the games they offer — check the game's information panel in-game, or the casino's game information page.
How to Use RTP Practically
- Compare games: Between two similar slots, the one with higher RTP is theoretically more favourable over time.
- Be cautious of very low RTP games: Anything below 94% for a slot is on the lower end.
- Don't use RTP to predict sessions: RTP tells you nothing about whether you'll win tonight.
- Check the in-game info: Most regulated online slots display their RTP in the paytable or info screen.
Understanding RTP and house edge gives you a clearer picture of what any game costs to play over time — which is essential for making informed decisions.