Casino Game Odds, Side by Side: Where Does Your Stake Really Go?

Why This Comparison Is Worth Your Time

If you're going to spend money at a casino, online or in person, it's worth actually knowing what you're paying for it. That's what the house edge really represents: a price tag, expressed as a percentage of what you stake.

Here's the surprising part — that price swings wildly between games. Playing blackjack well can cost you roughly fifty times less per bet than playing keno. Yet both sit on the same casino floor, equally within reach, with nothing signposting that one is dramatically pricier than the other.

This piece lines the numbers up so you can see exactly what each game genuinely costs.

The House Edge, Game by Game

Below is a rundown of popular casino games alongside their house edge and RTP. Many games carry a range depending on specific rules, bet type, or how well you play.

A couple of things jump out straight away. The spread is huge — from under 1% up past 25%. And within a single category, slots especially, there's plenty of variation depending on the exact machine or variant.

Breaking Down the Individual Games

Blackjack: Great, With a Big Asterisk

Blackjack consistently offers the lowest house edge on the casino floor — provided you play basic strategy properly. That headline 0.2% edge needs a specific rule set (single deck, dealer stands on soft 17, double after split permitted) and flawless play to match it.

Most players fall well short. Research suggests the average recreational player faces something closer to a 2–4% edge simply through suboptimal decisions. The gap between theory and practice is wider here than almost any other game, precisely because your choices actually matter.

Worked example: playing perfect strategy on a £10 table against a 0.5% edge, you'd expect to lose roughly £5 an hour (at around 80 hands). Play averagely against a 3% edge instead, and that jumps to £24 an hour. That knowledge gap literally costs you £19 an hour.

Craps: Stick to the Simple Bets

Craps is a great case study because the edge shifts massively depending on which bets you actually place. The pass/don't pass lines sit at a very reasonable 1.36–1.41%. But the proposition bets in the middle of the table? Some carry edges of 11–17%.

Same game, same table, same chips — yet the price per bet can vary tenfold depending on where you put your money down. Seasoned players tend to stick with pass/don't pass plus odds bets, which carry zero house edge — making it one of the cheapest games in the building.

Roulette: Two Wheels, Very Different Prices

The gap between European roulette (2.70%) and American roulette (5.26%) is one of the clearest illustrations of how a small rule change can double the cost of a game. American wheels keep the same payouts as European ones but add an extra zero pocket, nearly doubling the house's edge.

Where both are available, choosing American roulette means paying more for the exact same experience. We break down the full maths in our roulette article.

Slots: The Unpredictable One

Slots have by far the widest RTP range of any casino category. Online slots typically land between 94–97%, while land-based machines can slip as low as 85%, particularly in airports, pubs and other non-casino locations where nobody's shopping around.

Crucially, RTP alone says nothing about volatility. A 96% RTP slot could hand out steady small wins or occasional massive ones, and the experience — and risk — of each is fundamentally different despite matching long-run returns.

Keno: The Costliest by a Distance

Keno stands out as the most expensive mainstream game around by a clear margin. With house edges typically running 25–30%, it hands back less than three-quarters of what's wagered over time. To put that another way, it's roughly like playing several rounds of European roulette simultaneously.

It stays popular partly because the potential payouts look large relative to the stake, and the slower pace disguises the true cost. Mathematically, though, there's no dodging it — keno is the priciest game on the floor.

What the Cost Actually Looks Like Per Hour

Raw house edge percentages alone can mislead, because they ignore how fast a game moves. A 2% edge on a rapid game can end up costing more per hour than a 5% edge on a slow one.

Notice that online slots, despite a "modest-looking" 4% edge, can actually cost more per hour than roulette thanks to how fast they run. Speed of play is a hidden multiplier a lot of players never think to factor in.

What to Do With All This

None of this is meant to tell you which games to play — that's entirely your call, based on what you enjoy. But it does give you a genuine framework for understanding what you're paying:

1. Know your price. Every game has one, and now you know roughly what it is. Treat house edge as an entertainment cost, similar to a cinema or concert ticket.
2. Compare like for like. Over a two-hour session, the gap between a 0.5% and a 5% edge at the same stake level is roughly a tenfold difference in expected cost. That's not small.
3. Watch the pace. Faster games rack up the edge quicker. Time spent playing is a major driver of your total expected loss.
4. Skill genuinely counts in some games. In blackjack and video poker, the gap between playing optimally and playing casually can shift your effective house edge by several points. If those are your games, learning basic strategy is probably the single best-value thing you can do.

The house always has an edge — but how big that edge is depends entirely on which game you pick and how you play it. Knowledge won't erase the cost, but it does let you make an informed call on how much you're comfortable paying.