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What Is RTP & House Edge in Gambling? (2026)
RTP and house edge are the two most important numbers in gambling — and they're really just one number seen from two sides. RTP (return to player) is the percentage of all money wagered that a game pays back over the long run; the house edge is the casino's cut — what's left over. They always add to 100%: a slot with 96% RTP has a 4% house edge. Understanding these tells you, on average, how fast any game will drain your money — and which games give you the best shot. Here's how they work.
RTP & house edge at a glance
- RTP = the share of wagers a game returns to players over time; house edge = 100% − RTP.
- A 96% RTP game has a 4% house edge — it keeps ~$4 of every $100 wagered long-term.
- Formula: RTP = total won ÷ total wagered × 100.
- Good RTP: 98%+ exceptional, 96–97% high, 94–96% average, below 90% poor.
- Best odds: blackjack 99%+, European roulette 97.30% — worst: keno and many slots.
- RTP is a long-run average, not a session promise — short-term results swing wildly (volatility).
What is RTP (return to player)?
Return to player (RTP) is the percentage of all wagered money that a game is designed to pay back to players over a very large number of plays. A game with 96% RTP returns about $96 of every $100 wagered across its lifetime, keeping roughly $4. It's the single most useful figure for comparing games — the higher the RTP, the more of your money comes back on average. Reputable online games publish their RTP in the help file or rules.
What is house edge, and how do they relate?
The house edge is the mirror image of RTP — the casino's built-in advantage, or the percentage of wagers it expects to keep. Because every dollar wagered is either returned to players or kept by the house, the two always sum to 100%:
RTP + House edge = 100%. A 94.74% RTP means a 5.26% house edge. Example: bet $500 across 100 spins of American roulette (RTP 94.74%) and you'd expect about $473.70 back — the casino keeps ~$26.30, its 5.26% edge. For the full game-by-game breakdown, see our house edge by game guide.
How is RTP calculated?
The formula is simple: RTP = total amount won by players ÷ total amount wagered × 100. But that's the actual RTP measured over real play. What games advertise is the theoretical RTP — the payout percentage baked into the game's math model, paytable and rules. Developers decide which outcomes exist, how often they appear and what each pays, then run millions of simulated rounds to confirm the game returns its target percentage before launch. Over enough real spins, actual RTP converges on that theoretical figure (the same law of large numbers that makes casinos profitable).
What counts as a good RTP?
Most casino games are designed with an RTP between about 83% and 99.5%. Here's how to read the number:
| RTP | House edge | Rating |
|---|---|---|
| 98%+ | <2% | Exceptional — video poker, blackjack, some classic slots |
| 96–97% | 3–4% | High — the benchmark good online slots aim for |
| 94–96% | 4–6% | Average — acceptable for most players |
| Below 90% | 10%+ | Poor — common in land-based slots; avoid online |
For context, blackjack with basic strategy exceeds 99% RTP, European roulette is 97.30%, American roulette 94.74%, and slots range from ~85% to 98% (see our slot statistics). Always check the number before you play — a 92% slot costs you twice as much per bet as a 96% one.
RTP vs volatility — what's the difference?
RTP tells you how much comes back over time; volatility (or variance) tells you how it comes back. A low-volatility game pays small wins often; a high-volatility game pays rarely but big. Two slots can share a 96% RTP yet feel completely different — one drips steady small wins, the other swallows your bankroll then, occasionally, hits a huge payout. RTP is about the long-run average; volatility is about the ride to get there.
Does RTP mean you'll get that back?
No — RTP is a lifetime average, not a session guarantee. A 96% RTP does not mean you'll leave with 96% of your money tonight. Over one session you might double your money or lose it all — that's variance. The RTP only asserts itself over millions of bets, and it always favours the house. The more you play, the closer your results trend toward losing that 4%.
Frequently asked questions
What does RTP mean?
RTP (return to player) is the percentage of all wagered money a game pays back to players over the long run. A 96% RTP game returns about $96 of every $100 wagered over its lifetime and keeps about $4.
What is the difference between RTP and house edge?
They are two sides of the same number and always add to 100%. RTP is the share returned to players; house edge is the share the casino keeps. A 96% RTP equals a 4% house edge.
What is a good RTP?
98% or higher is exceptional, 96–97% is high and the benchmark for good slots, 94–96% is average, and below 90% is poor and best avoided. Blackjack and video poker offer the highest RTPs.
Does a high RTP mean I will win?
No. RTP is a long-run average over millions of plays, not a session promise. In a single session you can win big or lose everything — that is volatility. Over time, results trend toward the house edge.
How is RTP calculated?
Actual RTP is total amount won by players divided by total amount wagered, times 100. Games advertise the theoretical RTP, which is the payout percentage designed into the game's math model and confirmed through millions of simulated rounds.
Sources
- VegasInsider — What Is House Edge and RTP?
- BettingUSA — Return To Player (RTP) & Volatility Explained
- Wizard of Odds — House Edge of Casino Games Compared
- GamblingZone — RTP vs House Edge: Definitive Guide