Craps House Edge Explained
What this guide covers
Craps has one of the widest house-edge ranges of any casino game — from a genuine 0% on odds bets up to nearly 17% on the worst proposition bets. This guide explains exactly where that edge comes from on each bet type and why the range is so wide. For the probability math this all builds on, see craps odds explained; for a ranked comparison of every bet, see best craps bets by house edge.
Where house edge comes from, generally
House edge exists wherever a bet's payout ratio sits below its true probability-based odds. Every craps bet except odds is deliberately structured this way — the gap between what a bet "should" pay based on pure probability and what it actually pays is the house's built-in advantage, expressed as a percentage of every dollar wagered.
Calculating house edge: the basic method
House edge is calculated as: (probability of losing × amount lost) minus (probability of winning × amount won), expressed as a percentage of the total amount wagered. For pass line: your probability of eventually winning is 244/495 (a figure derived from combining come-out and point-phase probabilities across all possible points), and working through the full calculation produces the well-known 1.41% figure.
Why pass line's house edge calculation is more complex than roulette's
Unlike a roulette bet, which resolves in a single spin, a pass line bet's probability of winning depends on combining the come-out roll's immediate outcomes with the point-phase probabilities across every possible point number — a weighted average across several distinct sub-calculations. This complexity is exactly why craps math looks more intimidating than roulette's more straightforward single-spin calculations, even though the underlying principle (payout below true odds) is identical.
House edge across every bet type
| Bet | House edge |
|---|---|
| Odds (any) | 0% |
| Don't pass / don't come | 1.36% |
| Pass line / come | 1.41% |
| Place 6 or 8 | 1.52% |
| Buy 4 or 10 (with commission) | ~4.76% |
| Place 5 or 9 | 4.0% |
| Field (typical) | ~2.7%-5.5% |
| Place 4 or 10 | 6.67% |
| Hard 6 or 8 | 9.09% |
| Big 6 / Big 8 | 9.09% |
| Any craps | 11.1% |
| Hard 4 or 10 | 11.1% |
| 3 or 11 | 11.1% |
| 2 or 12 | 13.9% |
| Any seven | 16.67% |
This table, in full, is the clearest single reference for understanding craps value — nothing else at the table communicates "where your money goes" as directly as seeing every bet's edge side by side.
Why odds bets are the sole zero-edge exception
Odds bets pay exactly true mathematical odds because casinos deliberately chose not to build an edge into them, relying entirely on the accompanying line or come bet (which does carry an edge) to generate revenue from that combined wager. This is a genuine, verifiable mathematical fact, not a marketing claim — it's the one place in standard casino gambling where a bet's expected value is precisely zero.
Why house edge varies so much more in craps than in roulette
Roulette's house edge sits in a narrow band (2.70% to 5.26%, with rare exceptions) because nearly every bet type is calibrated against the same underlying wheel structure. Craps' bets, by contrast, are built on fundamentally different payout logics — even-money line bets, adjusted-ratio place bets, commission-based buy/lay bets, and large-multiple proposition bets — each with its own distinct relationship between true odds and actual payout, producing the much wider 0%-16.67% range.
Blended house edge when combining bets
When you combine a line bet with odds, your overall house edge across the total wagered amount is a weighted blend of the two components — the edge-carrying line bet and the zero-edge odds portion. A $10 pass line bet with $50 in 5x odds carries a blended edge of roughly 0.33% across the full $60 wagered, considerably better than the 1.41% the pass line bet alone would suggest. See how craps odds bets work for the full calculation method.
Why house edge doesn't predict a single session's outcome
House edge is a long-run average across an enormous number of repetitions, not a forecast for any individual session — a session using even the best-value bets (pass line plus max odds) can still finish well above or below the theoretical expected loss due to ordinary variance. Understanding house edge tells you what to expect over the long run, not what will happen in your next hour at the table.
Why house edge should drive your bet selection more than payout size
A common mistake is being drawn to a bet's payout multiple (30:1 sounds far more exciting than 6:5) without considering the house edge those numbers actually represent. Payout size and house edge are related but distinct: a bet can offer a large payout and still be poor value, or a modest payout and be excellent value (as with odds). Anchoring your bet selection to the house-edge figures throughout this guide, rather than payout size alone, is the more reliable path to understanding what you're actually paying for each bet.
House edge and bet persistence
Bets that persist across many rolls (place bets, standing come bets) versus bets that resolve every single roll (most proposition bets) experience their house edge differently over the course of a session — a high-edge one-roll bet placed repeatedly compounds its cost with each individual roll, while a lower-edge persisting bet's cost accrues more gradually across however many rolls it takes to resolve. This is worth factoring in alongside the raw house-edge percentage when comparing your total expected cost across different betting approaches.
Why understanding house edge changes how you play
Once you internalize that house edge is fixed per bet type and unaffected by betting sequence or system, several things become clear: no combination or pattern of bets reduces your overall cost beyond simply choosing lower-edge bets and maximizing odds, and the entire menu of proposition and hardway bets exists at a real, quantifiable cost that's worth weighing deliberately rather than being drawn in by payout size alone. See craps strategy guide for how this understanding shapes practical session approaches.
Frequently asked questions
What's the single best house-edge bet in craps? Odds bets, at exactly 0% — the only bet in the game (and one of the only bets in standard casino gambling generally) with no built-in house advantage.
Why is craps' house-edge range so much wider than roulette's? Craps' bets are built on fundamentally different payout structures (even-money, adjusted-ratio, commission-based, large-multiple), each with its own relationship to true odds, producing a much broader range than roulette's more uniform bet types.
Does combining a line bet with odds actually lower my overall cost? Yes — the zero-edge odds portion blends with the line bet's edge across your total wagered amount, producing a meaningfully lower overall house edge than the line bet carries alone.
Is any seven really one of the worst bets in the casino? Its 16.67% house edge is genuinely among the highest of any common casino bet, roulette, blackjack, or otherwise.
Does a bigger payout always mean worse house edge? Not always, but frequently — large payout multiples often (though not universally) correlate with higher house edges, which is why checking the actual edge figure matters more than payout size alone.
Can any betting system reduce craps' house edge? No — house edge is fixed per bet type; sequencing or combining bets differently changes variance and session pacing, not the underlying edge of any individual wager.
