A lay bet is a craps wager where you bet that a 7 will roll before a selected number, such as 4, 5, 6, 8, 9, or 10. Because the 7 is more likely than any individual box number, the player usually risks more than the amount they can win and pays a commission.
Plain Talk
In plain English, a lay bet is the “against the number” version of a buy bet. Instead of betting that the 10 will appear before the 7, you are betting that the 7 will appear before the 10.
That sounds strong because seven is the most common total with two dice. But the casino does not pay you even money. You must lay a larger amount to win a smaller amount, and the casino charges a vig. That is where the house edge comes from.
This glossary page defines the term. For the full game explanation, read Craps and the Glossary.
Where You See It
Lay bets appear in craps, especially among players who prefer dark-side action, hedge positions, or number-specific bets against box numbers.
| Term | Plain-English meaning | Where it appears | Why it matters |
|---|---|---|---|
| Lay Bet | Bet that 7 comes before a number | Craps layout and dealer calls | Reverses normal number betting |
| Lay Odds | Risking more to win less at true odds | Don’t pass and don’t come odds | Shows why 7 is favored |
| Vig | Commission on the wager | Lay bet procedure | Creates the house edge |
| Don’t Pass | Main dark-side line bet | Craps layout | Often paired with lay odds |
Helpful rule and math references include Wizard of Odds craps basics, Wizard of Odds craps appendix, and casino-published rules such as Venetian craps rules.
Why It Matters
Lay bets expose a part of craps that many casual players never understand: the most likely side is not always the most profitable side. Yes, the 7 is more likely to show than any one box number. But the payout is reduced because the casino knows that.
For example, laying against the 4 or 10 normally means risking $40 to win $20, before vig. Laying against the 6 or 8 requires even more risk relative to win amount because the 6 and 8 are more likely to appear than the 4 or 10.
Example
A player lays $40 against the 10. If a 7 rolls before the 10, the player wins $20 minus commission. If the 10 rolls before the 7, the player loses the $40.
The player wins more often than they lose, but losing tickets are larger. That is why judging the bet only by hit rate is a trap.
From the Casino Side:
From the casino side, a lay bet requires correct odds pricing, commission treatment, and dealer communication. Dealers must know the proper win amount for each number and handle the vig according to house rules.
Floor supervisors watch lay bets because wrong payouts can be expensive. Surveillance may review whether the bet was booked before the dice were out, whether odds were marked correctly, and whether the dealer collected the commission correctly.
Common Misunderstanding
The most common mistake is thinking “I am betting on the 7, so I have the advantage.” The player has a stronger chance to win the decision, but the price is worse because the win amount is smaller than the risk.
Hard Truth
A lay bet lets you be right more often while still giving the casino its price. Frequency is not the same as value.
Related Terms
| Term | Difference | Best page to read next |
|---|---|---|
| Buy Bet | Betting for a number instead of against it | Buy Bet |
| Don’t Pass | Main line bet against the shooter | Don’t Pass |
| Odds Bet | True odds attached to line bets | Odds Bet |
| Vigorish | The commission charged by the house | Vigorish |
| Seven Out | The event lay bettors often want | Seven Out |
FAQ
Is a lay bet a dark-side bet?
Yes. It is a bet against a specific number, and it wins when a 7 appears first.
Why do I risk more than I win?
Because the 7 is more likely than the selected number. The payout reflects that advantage.
Does a lay bet pay true odds?
The gross odds are based around true odds, but the commission gives the casino an edge.
Is a lay bet better than don’t pass odds?
Not usually. Don’t pass odds are attached to a line bet and are usually paid at true odds without the same standalone lay-bet commission structure.
Can lay bets be turned off?
House procedures vary. Always ask the dealer how the table handles lay bets and whether the bet is working on come-out rolls.
Deeper Insight
Lay bets are useful for understanding the difference between probability and price. A bet can win more often than it loses and still be negative expectation if the payout is cut enough.
Formula / Calculation
| Metric | Formula | Plain-English meaning |
|---|---|---|
| Net Lay Win | Gross Win - Vig | What the player keeps after commission |
| Risk-to-Win Ratio | Amount Risked / Amount Won | How much you must risk for each dollar won |
| Expected Loss | Total Amount Wagered × House Edge | Long-run average cost |
| Effective Vig Rate | Vig / Amount Risked | The fee measured against the money at risk |
Formula Explanation in Plain English
A lay bet is not judged by how often it wins. It is judged by whether the amount won is enough to compensate for the larger amount risked, after commission. The casino’s edge lives in that pricing.
Related Reading
Compare this page with Buy Bet, Don’t Pass, Odds Bet, and Seven Out. For broader context, read Craps, Ask a Veteran, and Casino Operations.