craps lay vs buy 2026
Craps Lay vs Buy: The Strategic Edge Most Players Miss
Understanding the difference between craps lay and buy bets separates casual shooters from disciplined bankroll managers. Craps lay vs buy isn't just terminology—it's a fundamental choice affecting your house edge, payout structure, and long-term profitability at the table. While both bets target the same numbers (4, 5, 6, 8, 9, 10), their mechanics flip traditional betting logic on its head. This guide cuts through casino marketing fluff to expose the mathematical reality behind these wagers, including commission structures, optimal number selection, and when to avoid them entirely.
Why "Lay" and "Buy" Flip Craps Math Upside Down
Standard craps place bets pay less than true odds. A $6 bet on 6 or 8 pays $7 instead of the fair $7.20 (6:5 true odds). Buy bets reverse this by letting you pay a commission for true odds payouts. Conversely, lay bets let you wager against a number hitting before a 7—essentially betting the shooter will seven-out before making their point. You're paid true odds when you win, but must overcome a commission hurdle.
This inversion creates counterintuitive scenarios:
- Buying the 4 or 10 often beats placing them
- Laying the 4 or 10 can be smarter than betting "Don't Pass"
- The 5/9 and 6/8 behave completely differently under buy/lay rules
Casinos exploit player confusion here. Pit bosses won't explain that buying the 4 at $25 costs you $1 commission but nets $49 profit ($50 true odds minus $1) versus $42 from a place bet. That’s $7 extra per win—a 16.7% boost.
Commission Structures: Where Casinos Hide Their Edge
The critical variable in craps lay vs buy decisions is commission timing and calculation. Three models exist:
- Vig-on-Win: Pay commission only when your bet wins (most favorable)
- Vig-Upfront: Pay commission when placing the bet (common for buy bets)
- Vig-on-Bet: Pay commission based on total wager amount regardless of outcome (rare)
Most US casinos use vig-on-win for lay bets but vig-upfront for buy bets. This asymmetry dramatically impacts strategy. For example:
- Buying the 4 for $20 with upfront 5% vig costs $1 immediately. Win pays $39 ($40 true odds - $1 vig).
- Laying the 4 for $40 with vig-on-win costs nothing upfront. Win pays $19 ($20 true odds - $1 vig).
Always confirm the house policy before betting. Some casinos (like those in Nevada) charge vig only on buy bet wins for amounts ≥$20, while others (Atlantic City) may use different thresholds.
The Hidden Math: When Lay/Buy Actually Beat Place Bets
Not all numbers benefit equally from lay/buy treatment. True odds and commission percentages create break-even points:
| Bet Type | Number | True Odds | Standard Place Payout | Buy/Lay Break-Even Point | Optimal Strategy |
|---|---|---|---|---|---|
| Buy | 4 or 10 | 2:1 | 9:5 ($1.80 per $1) | ≥$20 bet | Always buy (vig-on-win) |
| Buy | 5 or 9 | 3:2 | 7:5 ($1.40 per $1) | ≥$25 bet | Place unless high roller |
| Buy | 6 or 8 | 6:5 | 7:6 ($1.167 per $1) | Never | Never buy (place always better) |
| Lay | 4 or 10 | 1:2 | N/A | Any amount | Always lay over Don't Pass |
| Lay | 5 or 9 | 2:3 | N/A | ≥$30 lay | Lay only with large bankroll |
| Lay | 6 or 8 | 5:6 | N/A | Never | Avoid (house edge too high) |
Key insight: The 4 and 10 are the ONLY numbers where buy/lay consistently outperform place/don't place bets. Their high true odds (2:1) offset commission costs efficiently. For 5/9, the math only works with larger bets. The 6/8 should never be bought or laid—their low volatility makes standard place bets superior.
What Others Won't Tell You: The Liquidity Trap and Table Limits
Most guides ignore two critical operational constraints:
- Minimum Bet Increments:
Casinos enforce minimum buy/lay amounts that often exceed place bet minimums. At a $10 table: - Place 4 minimum: $10
- Buy 4 minimum: $20 (to justify $1 vig)
- Lay 4 minimum: $40 (to win $20 after vig)
This forces smaller bankrolls into suboptimal place bets. If your session budget is $200, buying the 4 eats 10% of your bankroll per bet—unsustainable for hit-and-run strategies.
-
Commission Rounding Traps:
Some casinos round commissions up. Betting $25 on the 5 with 5% vig should cost $1.25, but houses often charge $2. This increases the effective house edge from 2% to 4%. Always ask: "Do you round commissions up or down?" before placing action. -
The "Win Frequency" Illusion:
Lay bets win more often than they lose (since 7 appears before 4/10 ~66% of the time). But small, frequent wins ($19 on a $40 lay) feel psychologically rewarding while masking long-term bleed from commissions. Track your net profit per 100 rolls—not win count.
Real-World Example: Maximizing Value on the 4
Imagine you're at a Las Vegas casino with vig-on-win for buys ≥$20:
-
Scenario A: Place $20 on 4
Win probability: 33.3%
Payout: $36 ($16 profit)
Expected value per roll: -$0.80 -
Scenario B: Buy $20 on 4 (pay $1 vig on win)
Win probability: 33.3%
Payout: $39 ($19 profit)
Expected value per roll: -$0.33
Over 100 rolls, Scenario B saves you $47 in expected losses. Now scale this to laying the 4:
- Lay $40 against 4 (win $19 after $1 vig)
Win probability: 66.7%
Expected value per roll: -$0.27
Laying actually has a lower house edge (-0.27%) than buying (+0.33%) for the 4/10. Yet 95% of players never consider laying because it "feels wrong" to bet against the shooter.
When to Walk Away: The 6/8 Buy/Lay Myth
Despite online forums claiming "buying 6/8 is secret pro strategy," the math is unequivocal. Consider:
- Place $12 on 6: Wins $14 (16.67% ROI)
- Buy $12 on 6: Pays $14.40 true odds but loses $0.60 to 5% vig → Net $13.80 (15% ROI)
You lose money by buying. The same applies to laying 6/8—the house edge balloons to 4.17% versus 1.52% for Don't Place bets. Avoid these numbers entirely in buy/lay formats.
Actionable Strategy Framework
Follow this decision tree at any craps table:
- Identify commission policy: Vig-on-win? Upfront? Minimum thresholds?
- Check your bankroll: Can you afford 2x the table minimum for buy/lay?
- Target ONLY 4/10:
- If betting for the number → BUY (if ≥$20)
- If betting against the number → LAY (any amount)
- Ignore 5/9/6/8: Stick to place/don't place bets
- Track commissions: Deduct vig from every win in your mental accounting
This approach reduces your effective house edge on 4/10 plays from 6.67% (place) to 1.67% (buy) or 1.67% (lay)—a 75% improvement.
FAQ
What's the difference between craps lay and buy bets?
Buy bets wager that a specific number (4,5,6,8,9,10) will hit before a 7, paying true odds minus commission. Lay bets wager that a 7 will hit before your chosen number, also paying true odds minus commission. Essentially, buy bets support the shooter; lay bets oppose them.
Which numbers should I never buy or lay?
Avoid buying or laying 6 and 8 entirely—their low house edge on standard place/don't place bets (1.52%) becomes worse with commission. For 5 and 9, only consider buy/lay with large bets ($25+ for buy, $30+ for lay) and favorable vig policies.
Do all casinos charge commission the same way?
No. Policies vary significantly: some charge vig only on wins, others upfront. Minimum bet thresholds for reduced vig also differ (e.g., $20 in Nevada vs. $25 elsewhere). Always ask the dealer: "Is commission paid on win or when placing the bet?"
Is laying better than Don't Pass bets?
For numbers 4 and 10, yes—laying has a lower house edge (1.67% vs. 1.36% for Don't Pass). But Don't Pass covers all point numbers collectively, while lay bets target one number. Use lay bets when you specifically want to hedge against 4/10 points.
How does commission affect my bankroll long-term?
Commissions compound silently. A 5% vig on a $20 buy bet seems small ($1), but over 100 wins, that's $100 lost to vig alone. Track commission as a separate expense category in your gambling budget—it often exceeds table losses.
Can I remove lay/buy bets before resolution?
Yes, both are "working" bets you can turn on/off or remove anytime. Unlike Pass/Don't Pass, they aren't contract bets. This flexibility lets you adjust during hot/cold streaks—but remember, the house edge applies per roll, not per decision.
Conclusion
Craps lay vs buy decisions hinge on three factors: number selection (only 4/10 matter), commission structure (vig-on-win essential), and bankroll size (must afford minimum thresholds). Ignoring these turns potentially profitable bets into slow leaks. The strategic advantage lies not in complexity, but in disciplined number targeting—exploiting the 4/10's mathematical vulnerability while avoiding the 6/8 trap. In a game where most players bleed 4-6% house edge, mastering lay/buy on 4/10 slashes your exposure to under 2%. That difference separates lifetime winners from consistent losers. Next time you approach a craps table, skip the place bets on 4/10 entirely. Demand true odds—or don't bet at all.
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