Casino Game Odds Compared: Where Does Your Money Go?

Why Comparing Odds Matters

If you're going to spend time and money at a casino — whether online or in person — you should at least know what you're paying. Because that's what the house edge really is: a price. It's the mathematical cost of playing each game, expressed as a percentage of each bet.

The surprising thing? This cost varies enormously between games. Playing blackjack with good strategy costs roughly 50 times less per bet than playing keno. Yet both games sit on the same casino floor, equally accessible, with no sign telling you that one is dramatically more expensive than the other.

This article puts the numbers side by side so you can see exactly what each game costs.

The House Edge Table

Here's a comprehensive comparison of popular casino games, their house edges, and RTPs. Note that many games have variable edges depending on specific rules, bet types, or player strategy.

A few things immediately stand out. The range is enormous — from under 1% to over 25%. And within individual games, particularly slots, the variation can be significant depending on the specific machine or game variant.

Game-by-Game Breakdown

Blackjack: The Player's Best Friend (With Caveats)

Blackjack consistently offers the lowest house edge of any casino game — but only if you play basic strategy correctly. The "best case" 0.2% edge requires a specific ruleset (single deck, dealer stands on soft 17, double after split allowed) and perfect play.

Most players don't achieve this. Studies suggest the average recreational blackjack player faces a house edge of 2–4% due to suboptimal decisions. The gap between theoretical and actual performance is larger in blackjack than almost any other game, precisely because player decisions matter.

Practical example: At a €10 table playing perfect strategy against a 0.5% edge, you'd expect to lose about €5 per hour (assuming 80 hands/hour). With average play at a 3% edge, that becomes €24/hour. The knowledge gap literally costs €19/hour.

Craps: Simple Bets Are Best

Craps is a fascinating case study because the house edge varies dramatically depending on which bets you make. The pass/don't pass lines offer a 1.36–1.41% edge — excellent by casino standards. But the "proposition bets" in the centre of the table? Some carry edges of 11–17%.

It's the same game, at the same table, with the same chips. But the cost per bet varies by a factor of ten depending on where you place them. Most experienced players stick to pass/don't pass with odds bets — which carry zero house edge — creating one of the cheapest games in the casino.

Roulette: A Tale of Two Wheels

The difference between European (2.70% edge) and American (5.26%) roulette is one of the clearest examples of how a small rule change dramatically affects cost. American roulette has the same payouts as European but adds an extra zero pocket, nearly doubling the house advantage.

If both wheels are available, playing American roulette is objectively paying more for the same experience. We cover the full mathematical breakdown in our roulette math article.

Slots: The Wild Card

Slots have the widest RTP range of any casino game type. Online slots typically sit between 94–97% RTP, while land-based machines can drop as low as 85% — particularly in airports, bars, and other non-casino locations where players aren't comparing options.

Critically, RTP alone doesn't tell you about volatility. A 96% RTP slot could give you steady small wins or rare massive ones, and the experience (and risk) of each is fundamentally different despite identical long-term returns.

Keno: The Expensive Outlier

Keno stands out as the most expensive mainstream casino game by a significant margin. With house edges typically between 25–30%, it returns less than three-quarters of money wagered over time. For comparison, that's roughly equivalent to playing 10 rounds of European roulette simultaneously.

It remains popular because the potential payouts are large relative to the bet size, and the pace is slow — factors that make the cost feel less apparent than it actually is. But mathematically, there's no getting around it: keno is the most expensive game on the floor.

What "House Edge Per Hour" Actually Looks Like

Raw house edge percentages can be misleading because they don't account for game speed. A 2% house edge at a fast game can cost more per hour than a 5% edge at a slow one.

Notice how online slots, despite a "moderate" 4% edge, can actually cost more per hour than roulette due to the rapid pace of play. The speed of the game is a hidden multiplier that most players don't think about.

Using This Information

This comparison isn't designed to tell you which games to play — that's a personal choice based on what you enjoy. But it does provide a framework for understanding what you're paying:

1. Know the cost. Every game has a price, and now you know what it is. Treat the house edge as an entertainment cost, similar to buying a cinema ticket or a concert ticket.
2. Compare rationally. If you're going to play for two hours, the difference between a 0.5% and a 5% edge game at the same bet level is roughly 10x in expected cost. That's significant.
3. Mind the speed. Fast games compound the edge more quickly. Time on device is a major factor in total expected loss.
4. Skill matters in some games. In blackjack and video poker, the gap between optimal and average play can change your effective house edge by several percentage points. If you're going to play these games, learning basic strategy is the single highest-return investment you can make.

The house always has an edge — but the size of that edge is entirely dependent on which game you choose and how you play it. Knowledge doesn't eliminate the cost, but it does let you make an informed choice about how much you're willing to pay.

This content is for educational purposes only.