Part V: Regional & Cultural · Casino Slang & Historical Terms

House Edge (House Advantage)

Industry — MathematicsREPORTED

(1) The house edge is the mathematical advantage expressed as a percentage that the casino holds over the player on any given bet, representing the average percentage of each wager that the casino expects to retain over the long term. It is calculated as the ratio of the expected player loss to the initial wager. For example, a house edge of 5.26% on American roulette means the casino expects to earn $5.26 for every $100 wagered over millions of spins. The house edge is the single most important metric in casino game design and operations: without it, the casino would not be a viable business. Surveillance professionals monitor for advantage play techniques that can reduce or eliminate the house edge. (2) The house edge (also known as house advantage or vigorish) is the mathematical advantage that the casino has over players in any given game, expressed as a percentage of each bet. The house edge ensures that, over the long run, the casino will retain a predictable percentage of all wagers. For example, baccarat’s Banker bet carries a house edge of approximately 1.06%, meaning the casino expects to win $1.06 for every $100 wagered. Different games carry different house edges: blackjack (0.5% with basic strategy) to keno (25-40%). (3) The mathematical advantage the casino holds over players, expressed as a percentage of each bet.

In practice

The house edge is the fundamental economic engine of the casino industry. Asian gaming markets heavily favor baccarat (low house edge, high variance) over other games, which explains why baccarat dominates Macau and Singapore casino revenue. The house edge varies dramatically by game and bet type: from 0.5% on blackjack with basic strategy to over 25% on keno. The terms “house edge” and “house advantage” are interchangeable. Formula: House Edge = (Expected Loss per Bet) / (Initial Wager) x 100%. Varies by game: baccarat ~1.06%, blackjack ~0.5% (with basic strategy), roulette 2.7%-5.26%.

One entry from the Casino Industry Glossary, 1,090 terms written for surveillance, compliance and operations professionals rather than for players. Definitions describe industry usage; where a term carries a regulatory meaning, verify against the instrument that governs your jurisdiction.