House Edge

The edge comes from the gap between the true odds of an outcome and the odds paid. European roulette pays 35 to 1 on a single number that has a 1 in 37 chance: the missing thirty-seventh is the house's 2.70% edge. American roulette adds a second zero and the edge doubles to 5.26%. In blackjack the edge comes from the player acting first and losing when both bust. With optimal basic strategy it falls to around 0.5%, and rises quickly with poor play. Baccarat's banker bet carries about 1.06% after commission, the player bet 1.24%, the tie bet over 14%.

For slots the edge is set by the maths model and certified, so it does not depend on player decisions. For skill-influenced games such as blackjack and video poker, the published edge assumes optimal play. The realised edge on real players is higher.

For operators, house edge sets expected margin per unit wagered, so revenue forecasting is turnover times edge. Low-edge games such as blackjack attract high-value players but earn little per bet, which is why they are weighted down or excluded in bonus wagering. Regulators in some markets set maximum edges or minimum RTPs.

For studios and live casino providers, edge is a design decision balanced against appeal: side bets with high edges subsidise a low-edge main game, and game-show formats carry higher edges in exchange for entertainment.

A live roulette table takes €2 million in bets over a month. At a 2.70% edge the expected GGR is €54,000. The same volume on an American double-zero wheel would be expected to produce €105,200. On a blackjack table with €2 million wagered, the expected GGR against optimal players is about €10,000 — and perhaps €40,000 against typical recreational play.

• RTP (Return to Player) — 100% minus house edge.
• Hold Percentage — the edge actually realised over a period.
• European Roulette — the classic 2.70% edge.
• Blackjack Rules — the lowest edge in the casino when played well.
• Baccarat Rules — banker, player and tie edges.

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