Reel Basics

RTP vs house edge: what's the difference

Updated 6 September 2026 ยท Odds and maths

RTP (Return to Player) and house edge are two ways of naming the same fixed percentage. RTP is the share of all wagers a game pays back over the long run; house edge is the share it keeps. The two numbers add up to 100%, so a 96% RTP game has a 4% house edge โ€” they are not separate figures, just opposite views of one built-in rule.

Why both terms exist

Regulators and paytables usually publish RTP because it sounds like a player-facing figure: "96% comes back." Casinos and game analysts more often talk about house edge, because it describes their side of the maths โ€” the guaranteed margin built into the rules. Neither term is more accurate than the other; they are the same calculation read from different directions.

On the same topic: Blackjack House Edge: About 0.5% Explained in 7 Steps and House Edge in Craps: Why It Changes With Every Bet.

House edge can always be found as 100% minus RTP. If a slot lists 94.5% RTP, the house edge is 5.5%. There is no game where both figures are independently set โ€” one determines the other completely.

What the percentage actually describes

Both RTP and house edge are long-run averages, not predictions for a single session. They are calculated across millions of simulated or actual rounds, using the full paytable and the game's odds of hitting each outcome. A single spin, hand or roll can land anywhere; the percentage only becomes visible over very large numbers of bets. A short session can lose everything or double the stake with an RTP figure that is technically accurate for the game as a whole.

The exact number for a specific game is not something to estimate or guess from watching play. It is printed in the game's own paytable or rules screen, and that figure is the one to check before treating any percentage as fact.

Questions and answers

Is a game with 98% RTP always better than one with 95%?

In pure long-run terms, yes: a higher RTP means a smaller expected loss over many bets. In practice, other factors matter too โ€” how volatile the game is, how large the top prizes are, and how the paytable spreads wins across different outcomes. Two games with the same RTP can feel very different to play, since one may pay small amounts often and the other rare large amounts.

Does house edge change depending on how I bet?

Within a single game, the house edge is usually fixed by the rules and does not shift based on stake size, timing, or betting pattern. Some games do have bets with different house edges built in โ€” certain side bets in table games, for example, carry a higher edge than the main bet. Choosing which bet to place can change the edge faced; nothing about the timing or sequence of bets does.

Can RTP tell me what will happen in my next session?

No. RTP describes an average outcome across a very large number of rounds, not a guarantee for any specific session, hour, or even day of play. Each spin or hand is an independent event with its own odds; the long-run percentage does not smooth out short-term results in any predictable way. A session can finish well above or well below the published figure without anything being wrong with the game.

Why do some games list several RTP figures for the same title?

Some games ship with adjustable settings, different bet levels, or optional features that change the maths slightly, and each configuration can carry its own RTP. A game might also have a "classic" version and a version with a different bonus feature, each with a separate published figure. Where more than one number is listed, the paytable or rules screen usually states which configuration applies to which RTP.

Is house edge the same as the odds of winning?

No, and this is one of the more common mix-ups. Odds of winning describe how often an outcome happens; house edge describes the long-run share of money kept regardless of how often wins occur. A game can have frequent small wins and still carry a high house edge, if the payouts on those wins are modest relative to the odds against them.

Does a lower house edge mean a system can beat the game?

No. House edge is built into the rules and payout structure of the game itself, and no betting pattern, timing, or staking system changes it. Games are typically built so that outcomes are random and independent from one round to the next, which means no sequence of past results gives useful information about what comes next. A smaller house edge only means the built-in margin against the player is smaller โ€” it does not create an edge in the player's favour.

Where can the real RTP figure for a specific game be checked?

The paytable or "information" screen within the game itself is the reliable source, since it reflects the exact version and configuration in use. Independent testing bodies and licensing regulators also publish figures for certified games, and these should match what appears in the paytable. Any number seen elsewhere that is not confirmed against the game's own paytable should be treated as unverified. These games are intended for adults, and understanding RTP and house edge before playing is part of understanding how the odds are actually structured.