RTP vs House Edge
RTP and house edge are the same fact wearing two outfits. A 99% return-to-player is a 1% house edge; a 5.26% edge is a 94.74% RTP. Once you see them as one number, you can compare any two casino games in seconds — and you can spot when an advertised RTP is unverifiable marketing rather than checkable math.
Compare the games →One number, two directions
Return to player (RTP) is the percentage of total wagers a game is expected to pay back over the long run. House edge is the percentage it is expected to keep. They always sum to 100%: RTP = 100% − house edge. Put 100 SUI through a 1%-edge game in many small bets and your expected total return is 99 SUI; put it through a 5.26%-edge game and the expectation is about 94.74 SUI. The word 'expected' is doing heavy lifting — these are long-run averages, not session guarantees — but as a price tag for a game, the number is exact. Casinos tend to advertise RTP because 96% sounds generous; analysts tend to quote edge because 4% sounds like what it is. Read either one and mentally flip it to the other.
Worked example: dice at 99% RTP
Llamabet dice makes the arithmetic visible. The edge is a flat 1% at every setting, and the payout formula is public: multiplier = 99 ÷ win chance. Set a 50% win chance and the payout is 1.98x; a 10% chance pays 9.9x; a 1% long shot pays 99x. Multiply any of them out — win chance × multiplier — and you get 0.99, which is the 99% RTP, everywhere on the slider. That is what an honest RTP looks like: a formula you can check on a napkin, not a percentage asserted in a footnote. It also means there is no trap setting; risk changes the shape of outcomes, never the price.
Blackjack and roulette: where the classics land
Blackjack played with basic strategy returns roughly 99.5% — a house edge around half a percent, varying slightly with the exact rules, per Wizard of Odds. Llamabet's table pays 3:2 on a natural, the dealer hits 16 and stands on 17, and every hand is dealt from a fresh four-deck shoe. Roulette shows how one rule change moves the number: the single-zero European wheel has a 2.70% edge (97.30% RTP), while the double-zero American wheel carries 5.26% (94.74% RTP). Same bets, same payouts, one extra pocket — and the price of play nearly doubles. If you remember only one comparison from this article, make it that one: always check how many zeros are on the wheel.
What RTP means over one session: almost nothing
RTP is a statement about millions of rounds. Over one evening, variance dominates it completely. The swing of a single even-money bet is enormous next to a 1–3% expectation, so across fifty or a hundred rounds you can easily finish well up on a 94.74% game and well down on a 99.5% one. Only as the number of rounds grows huge does your realized return converge toward the published RTP — that is the law of large numbers at work. The practical reading: RTP sets the average price of play, variance sets the shape of the ride, and no short session will look like the average. This is also why RTP is not an income statement — over time, a sub-100% RTP means play costs money, so treat the gap as an entertainment price, not a beatable margin.
An advertised RTP is only as good as its proof
Here is the uncomfortable part: on most gambling sites, RTP is a promise, not a property. A closed-source server can quietly run a different distribution than the one advertised, and no player could tell from results alone without a massive sample. Provably-fair commit-reveal closes that gap. On Llamabet, the SHA-256 hash of the shuffled deck is committed on Sui before any bet — BLS-signed and frozen as an immutable on-chain object — and the server seed is revealed after the round. Recompute the shuffle from the revealed seed and you confirm every outcome was drawn exactly as committed, which means the published edge is the edge you actually faced. An RTP you can verify is a price; an RTP you cannot verify is a slogan.
How to actually use RTP when choosing a game
If your goal is the most playtime per unit of bankroll, rank by RTP: blackjack with basic strategy (~99.5%), dice (99%), single-zero roulette (97.30%), double-zero roulette (94.74%). Then adjust for three things. Skill dependence: blackjack only earns its number if you follow basic strategy — misplays hand the edge back. Pace: a low edge paid a hundred times an hour can cost more per hour than a higher edge paid ten times. Variance appetite: dice at a 1% win chance and dice at 50% carry identical RTP but wildly different session shapes, so pick the volatility you actually enjoy. And whatever the number says, size your bankroll for entertainment: every game on the list returns less than 100% in the long run, by design.
Frequently asked questions
Is RTP the same as house edge?
They are the same measurement expressed from opposite sides: RTP is the share of wagers a game returns to players over the long run, house edge is the share it keeps, and they always sum to 100%. A 99% RTP game and a 1% house edge game are the same game.
Does 99% RTP mean I lose 1% every session?
No. RTP is a long-run average across a huge number of rounds; a single session is ruled by variance and can land far above or far below it. Over an evening you might double up or bust on the same game — 99% RTP only says that across millions of rounds, total returns trend toward 99% of total wagers.
How do I know a casino's advertised RTP is real?
On a closed server you mostly can't — you trust the operator or an auditor. On a provably-fair casino you can check it yourself: Llamabet commits a SHA-256 hash of the shuffled deck on Sui before each bet and reveals the seed afterward, so you can recompute every outcome and confirm the game paid exactly by its published rules.