Every casino game is built on the same two numbers: return to player (RTP) and house edge. Operators publish RTP because regulators require it, but the number rarely gets explained usefully. Here’s the mechanics operators would rather gloss over.
What RTP Actually Means
RTP is the percentage of wagered money a game is designed to return to players over a very large number of rounds — millions of spins or hands, not one session. A slot advertised at 96% RTP pays back about 96 cents per dollar over that sample; the other 4 cents is the house edge (4%), the flip side of the same coin.
The key word is “designed.” RTP is a theoretical, long-run figure from the game’s math model — paytable, reel weightings, payout odds — not a promise about the next hour. A short session can land well above or below RTP from ordinary variance; neither means the number was wrong.
House Edge: The Casino’s Side of the Same Coin
House edge and RTP always add to 100%, so a 2% edge equals a 98% RTP. Edges vary widely by game category.
Table games with established strategies run the lowest edges: blackjack with correct basic strategy sits around 0.5%, European roulette a fixed 2.7%, and craps’ pass line about 1.41%. American roulette’s extra zero roughly doubles that to 5.26%. Slots vary far more, set per title by the developer. See how roulette payouts and odds work bet by bet.
| Game / Bet | Typical House Edge | Notes |
|---|---|---|
| Blackjack (basic strategy) | ~0.5% | Varies by table rules (deck count, dealer stands/hits soft 17, doubling restrictions) |
| European Roulette (single zero) | 2.7% | Fixed across all inside and outside bets |
| American Roulette (double zero) | 5.26% | Roughly double the European edge |
| Craps — Pass Line | 1.41% | Drops further once free odds bets are added |
| Craps — Any 7 | ~16.7% | One of the worst bets on the table |
| Online Slots | Typically 2%–10%+ | Set per title by the developer; check the paytable/info screen |
RTP vs. Volatility: Why Two 96% Games Feel Completely Different
Two games can share an identical RTP and feel nothing alike, since RTP tells you the average payback, not its distribution — that’s volatility. Low-volatility pays smaller amounts more often; high-volatility pays rarely but can produce much larger wins, so long dry stretches are normal. Neither is “better” — match volatility to your bankroll and comfort with swing. The slots chapter covers this in more depth.
Where RTP Numbers Come From (and Why to Trust Them)
RTP figures come from the game’s certified math model, and licensed operators generally must disclose it in the info or paytable screen. Independent labs verify real payout behaviour matches advertised RTP before a licensed platform can offer it — an unregulated site has no one confirming that, if a figure is disclosed at all.
Jurisdiction matters too: on any licensed Ontario casino, RTP disclosure and testing are a condition of holding an AGCO licence through iGaming Ontario.
How to Use RTP When Choosing a Game
RTP is most useful comparing similar games, not predicting your own results:
- Check the in-game info screen — RTP is usually disclosed there, sometimes as a range.
- Compare RTP within the same category — a 94% and a 97% slot aren’t equivalent long-run bets.
- Treat RTP and volatility as a pair — a high RTP with extreme volatility can still feel rough short-term.
- House edge never goes away — strategy can minimize it, not flip the math in your favour.
Understanding RTP and house edge means understanding gambling is a negative-expectation activity over time — which is why it belongs within a budget you’re prepared to lose. If gambling stops feeling optional, the tools on our responsible gambling page are a genuinely useful next step.