The House Advantage

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Casino table games and slot machines are designed with a house advantage.

Mathematically, the house advantage is a measure of how much the house expects to win, expressed as a percentage of the player’s wager.

For example, in a wager with a house advantage of 5%, the player will lose, on average over time, $5 for every $100 wagered.

In some table games, player betting or skill decisions can affect the house advantage, but it’s important to keep in mind that the house always has some advantage over the typical player.

Assuming standard rules and players with average skills, typical house advantages in popular casino games range from:
1.1% (player/banker bets) to 14.4% (tie bets) for baccarat
0.5% to 1.5% for twenty one (“blackjack”)
1.4% to 16.7% for craps
and 2.7% to 5.3% for roulette.

For slot machines, the house advantage could range from 4% to 12%.