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House Edge

The operator’s expected share of wagers under a model, rather than a fixed per-round deduction.

Concept and usage

The operator’s expected share of wagers under a model, rather than a fixed per-round deduction.[1]

In context

House edge describes a modeled long-run advantage for the house under a specified set of rules and probabilities. It explains how a game allocates expectation; it is not an observation of one player’s results.[1]

Common confusion

House edge and RTP are often presented as complementary measures, but direct conversion requires the same model, wager definition and payout scope. Variants, tie treatment and side bets can change the result.[1]

Example

Different roulette wheel layouts change the outcome set and theoretical expectation. A statement about “the roulette house edge” is incomplete until it identifies the version and rules being modeled. Compare with RTP only when probability, payout and calculation units align.[1]

Keep exploring

FoundationHouse edge and mathematical expectationHouse edge describes the operator’s expected share of wagers under a set of rules. It is not a fixed deduction on every round. Outcomes and their payouts combine to determine the expectation while individual results still vary.Deeper analysisProbability, payouts and experience: three languagesProbability describes how likely an event is, a paytable defines its payout and experience reflects a finite sequence of outcomes. These are related but not interchangeable. A large payout does not imply a likely outcome.Compare perspectivesUnderstanding RTP: expectation is not a promiseReturn to player describes long-run expected payouts relative to wagers under a specified game model. It is not a promised refund for a round or the amount an individual will receive over a short session.

Glossary

Compare perspectivesRTPRelated contextWagerRelated contextPaytable

Sources and scope

  1. Return to player: how much gaming machines payoutUK Gambling CommissionChecked:

    Explains RTP as a long-run average and distinguishes random from compensated machines.