Comparing House Edges Across Casino Games
Every casino game is rigged in the same direction — toward the house — but not by the same amount. The difference between the cheapest bet on the floor and the most expensive one is well over tenfold. Knowing where each game sits, and how that edge actually drains a bankroll, is the single most useful thing a player can understand.
What "house edge" means
The house edge is the average percentage of each bet the casino expects to keep over the long run. A 1% edge means that, on average, every $100 wagered returns $99 to players and $1 to the house. It says nothing about any single bet — you can win big or lose fast in the short term — but over enough plays, the edge is destiny.
The games, ranked
Here's roughly where common games and their main bets fall. Exact numbers vary with rules and pay tables, but the ordering is stable:
| Game / bet | Typical house edge | Notes |
|---|---|---|
| Blackjack (basic strategy) | ~0.5% or less | Requires correct play every hand |
| Baccarat (banker bet) | ~1.06% | Among the lowest, no decisions |
| Craps (Pass line) | ~1.41% | Even lower with odds behind it |
| Roulette (single-zero) | ~2.70% | European wheel, one green pocket |
| Roulette (double-zero) | ~5.26% | American wheel, two green pockets |
| Slots | ~2% to 10%+ | Hidden, set by the machine |
| Keno / big six wheel | ~10% to 25%+ | The most expensive on the floor |
Why one wheel beats another
Roulette is the cleanest illustration. The single-zero (European) wheel and the double-zero (American) wheel pay the same on every bet — but the American wheel adds a second green pocket. That extra pocket is the entire difference, and it nearly doubles the edge from 2.70% to 5.26%. Same game, same payouts, twice the cost, just from one additional slot the ball can land in.
The takeaway: a game can look identical and still cost you twice as much. The pay table and the rules — not the glamour — determine the edge. Always look for the cheaper version of the same game.
Edge alone doesn't tell the story
A low edge is only half the picture. How fast you lose depends on edge multiplied by how much you bet, multiplied by how many bets you make per hour. This is sometimes called the expected loss, and it explains why slots can empty a wallet faster than roulette despite a comparable edge.
Compare two players, each with $5 bets:
- Roulette, single-zero, ~40 spins/hour: $5 × 40 × 2.70% ≈ $5.40 expected loss per hour.
- Slots, 6% edge, ~600 spins/hour: $5 × 600 × 6% = $180 expected loss per hour.
The slot player faces a higher edge and bets fifteen times as often. The combination — not either factor alone — is what drains the bankroll roughly thirty times faster. Speed is the silent killer.
Putting it together
If you only remember one rule, make it this: a small edge over many fast bets is just as ruinous as a large edge over a few slow ones. The way to lose the least is to pick low-edge bets and bet slowly and rarely. The way to lose the most is a high-edge, high-speed game. No "system" changes either side of that equation — the edge is baked in, and negative expected value stays negative no matter how you stagger the bets.
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