RTP and house edge

The house edge expresses the house's expected share of stakes under the stated model and play assumptions. Where the definitions use the same stake base, house edge is the complement of RTP.

For a hypothetical model with RTP of 96%, the corresponding house edge is 4%: 100% − 96% = 4%. This is a mathematical illustration, not a measured casino result or an actual game's quoted percentage. A 96% RTP does not mean a 96% chance of winning a round or a promise to recover 96 units from a deposit of 100.

A session can differ from an average

Actual outcomes vary. A long-run model does not schedule a payout for an individual player, and it does not become a guarantee merely because more rounds are played. The UK Gambling Commission's RTP explanation (English) distinguishes long-run return from session results.

Check the particular game

For a real percentage, identify the game, provider, version, configuration, rules and any assumptions about play. The same game name alone does not settle those details. Skill or peer-to-peer games can require a different interpretation from a fixed house game.

The Commission's rules and likelihood standard (English) provides UK technical context for game-specific information. It does not establish that any candidate in this catalogue complies with that standard. No numerical casino-wide RTP is assigned here.

Randomness and previous results

For independent rounds, a past win or loss does not alter the next round's probability. A losing sequence does not make the next win due. Independence must come from the game model; it should not be assumed for every game. The Commission distinguishes random and compensated machines in its explanation.

Choosing a stopping point can limit continued participation. It does not change the odds of a subsequent independent round. Changing a stake or stopping after a win should not be described as creating a mathematical advantage.

Reading a fairness claim

Treat a published “provably fair” description as something to examine. Ask which game and version it covers, what can be checked, and whether the running implementation or an independent audit was examined. A protocol description, an implementation test and a game return percentage are separate subjects. This guide does not certify a protocol or provide a cryptographic audit.

A useful reading checklist

  • Find the rules and percentage for the exact game and configuration.
  • Keep a theoretical model separate from observed results.
  • Check the assumptions before comparing RTP and house edge.
  • Read any bonus contribution and turnover requirements separately.
  • Keep the option to stop or not participate available.

Bonus wagering terms explain why qualifying turnover is not profit. Gambling risks and support provides practical information and territorial help resources. How we rate casinos explains why our scores never use a single casino-wide RTP figure.

Sources and corrections

The two UK Gambling Commission references were checked on 4 October 2026. The 96% / 4% pair is an original hypothetical calculation. Request a factual correction.