Parlays are one of the most popular bets in sports betting for a simple reason: a small stake can return a big payout. A $10 four-leg parlay with every leg at -110 pays $122.83 in profit. The catch is that it wins only about one time in 16 when each leg is a coin flip, and even then it pays less than the true odds.
The short answer: for most bettors, parlays are not worth it as a way to make money. Every leg multiplies the sportsbook’s margin, so the house edge grows from 4.5% on a straight bet to 8.9% on a two-leg parlay and 17.0% on a four-leg parlay. Parlays only make long-run sense if you genuinely win more than 52.4% of your bets at -110, and even then they bring far bigger swings than straight bets.
Here is the math, laid out in tables, so you can decide for yourself.
How parlay payouts work
A parlay combines two or more bets into one. Every leg has to win for the parlay to pay. To work out the payout, convert each leg’s American odds to decimal odds, multiply them together, then multiply the result by your stake.
| American odds | Decimal odds | Implied chance | Profit on a $100 bet |
| -300 | 1.333 | 75.0% | $33.33 |
| -250 | 1.400 | 71.4% | $40.00 |
| -200 | 1.500 | 66.7% | $50.00 |
| -150 | 1.667 | 60.0% | $66.67 |
| -120 | 1.833 | 54.5% | $83.33 |
| -110 | 1.909 | 52.4% | $90.91 |
| -105 | 1.952 | 51.2% | $95.24 |
| Even | 2.000 | 50.0% | $100.00 |
| +120 | 2.200 | 45.5% | $120.00 |
| +150 | 2.500 | 40.0% | $150.00 |
| +200 | 3.000 | 33.3% | $200.00 |
| +300 | 4.000 | 25.0% | $300.00 |
For two legs at -110, the decimal odds are 1.909 × 1.909 = 3.645. A $10 bet returns $36.45, which is $26.45 in profit, or +264 in American odds. To check any combination quickly, The Spread’s parlay calculator does the multiplication for you.
What a calculator doesn’t show is what the payout should be. Each -110 leg has a small margin built in, and in a parlay those margins multiply too. The next table shows how much that costs.
Parlay payouts at -110, from 2 to 10 legs
The table shows what parlays pay when every leg is priced at -110, next to the fair payout if each leg were a true 50/50 chance.
| Legs | Parlay odds | Profit on $10 | Fair odds (coin-flip legs) | Fair profit on $10 | Chance all legs win (coin-flip legs) |
| 2 | +264 | $26.45 | +300 | $30 | 25.0% (1 in 4) |
| 3 | +596 | $59.58 | +700 | $70 | 12.5% (1 in 8) |
| 4 | +1,228 | $122.83 | +1,500 | $150 | 6.3% (1 in 16) |
| 5 | +2,436 | $243.59 | +3,100 | $310 | 3.1% (1 in 32) |
| 6 | +4,741 | $474.13 | +6,300 | $630 | 1.6% (1 in 64) |
| 7 | +9,142 | $914.24 | +12,700 | $1,270 | 0.8% (1 in 128) |
| 8 | +17,545 | $1,754.46 | +25,500 | $2,550 | 0.4% (1 in 256) |
| 9 | +33,585 | $3,358.52 | +51,100 | $5,110 | 0.2% (1 in 512) |
| 10 | +64,208 | $6,420.82 | +102,300 | $10,230 | 0.1% (1 in 1,024) |
The gap between the real and the fair payout widens with every leg. A two-leg parlay pays $26.45 on $10 instead of a fair $30. A six-leg parlay pays $474.13 instead of $630. A ten-leg parlay pays $6,420.82 instead of $10,230, and with coin-flip legs it wins about once in 1,024 tries.
How often do parlays hit?
The chance a parlay wins is the chance of each leg winning, multiplied together. The table shows four leg win rates. Sustaining 55% at -110 over hundreds of bets is considered excellent, so for most bettors the realistic columns are the first three.
| Legs | Each leg wins 50% | Each leg wins 52.4% | Each leg wins 55% | Each leg wins 60% |
| 2 | 25.0% (1 in 4) | 27.5% (1 in 3.6) | 30.3% (1 in 3.3) | 36.0% (1 in 2.8) |
| 3 | 12.5% (1 in 8) | 14.4% (1 in 7) | 16.6% (1 in 6) | 21.6% (1 in 4.6) |
| 4 | 6.3% (1 in 16) | 7.5% (1 in 13.3) | 9.2% (1 in 10.9) | 13.0% (1 in 7.7) |
| 5 | 3.1% (1 in 32) | 4.0% (1 in 25.3) | 5.0% (1 in 19.9) | 7.8% (1 in 12.9) |
| 6 | 1.6% (1 in 64) | 2.1% (1 in 48.3) | 2.8% (1 in 36.1) | 4.7% (1 in 21.4) |
| 7 | 0.8% (1 in 128) | 1.1% (1 in 92.2) | 1.5% (1 in 65.7) | 2.8% (1 in 35.7) |
| 8 | 0.4% (1 in 256) | 0.6% (1 in 175.9) | 0.8% (1 in 119.4) | 1.7% (1 in 59.5) |
A bettor who wins 55% of single bets still loses about 91% of four-leg parlays and about 97% of six-leg parlays. Long losing runs are not bad luck. They are exactly what the math predicts.
Are parlays ever profitable?
Yes, but only if your picks beat the break-even rate. At -110, that rate is 52.4% per leg, and it stays at 52.4% per leg however many legs you add. A parlay’s break-even point is simply the single-bet break-even multiplied by itself once for each leg. What changes is how strongly each extra leg multiplies whatever edge you have, good or bad.
| Legs | Leg win rate 50% (no edge) | 52.4% (break-even) | 55% (strong) | 60% (elite, rare) |
| 1 (straight bet) | -$4.55 | about $0 | +$5.00 | +$14.55 |
| 2 | -$8.88 | about $0 | +$10.25 | +$31.21 |
| 3 | -$13.03 | about $0 | +$15.76 | +$50.29 |
| 4 | -$16.98 | about $0 | +$21.55 | +$72.15 |
| 5 | -$20.75 | about $0 | +$27.63 | +$97.19 |
| 6 | -$24.36 | about $0 | +$34.01 | +$125.87 |
| 8 | -$31.08 | about $0 | +$47.75 | +$196.36 |
| 10 | -$37.20 | about $0 | +$62.89 | +$288.85 |
Read the table across each row. With no edge, a four-leg parlay loses $16.98 per $100 on average, nearly four times as much as a straight bet. With a real 55% edge, the same parlay earns $21.55 per $100, more than four times as much as a straight bet. Parlays are an amplifier: they make good bettors better on paper and make everyone else lose faster.
The hard part is knowing which group you are in. Very few bettors can show a verified 55% record over hundreds of bets. If you can’t, the first column is the one that applies to you.
The same test applies to anyone whose picks you follow. Before you parlay someone else’s picks, check that they publish every result with the price taken. Sites such as BettingPicks post free daily betting picks with the price at publication and a public win-loss record, so you can see whether a source actually clears 52.4% before you start combining its picks.
Parlays vs straight bets: same picks, two results
Here are the same four picks at -110, bet two ways: four $25 straight bets or one $100 four-leg parlay.
| Result | Four $25 straight bets | One $100 4-leg parlay | Chance (legs win 50%) | Chance (legs win 55%) |
| 4-0 | +$90.91 | +$1,228.33 | 6.3% | 9.2% |
| 3-1 | +$43.18 | -$100.00 | 25.0% | 29.9% |
| 2-2 | -$4.55 | -$100.00 | 37.5% | 36.8% |
| 1-3 | -$52.27 | -$100.00 | 25.0% | 20.0% |
| 0-4 | -$100.00 | -$100.00 | 6.3% | 4.1% |
| Expected result | -$4.55 at 50%, +$5.00 at 55% | -$16.98 at 50%, +$21.55 at 55% | ||
| Chance you finish up | 31.3% at 50%, 39.1% at 55% | 6.3% at 50%, 9.2% at 55% |
The parlay wins big when all four picks hit: $1,228.33 against $90.91 for the straight bets. But it loses the full $100 on every other result, including a 3-1 day that would have made $43.18 with straight bets. With no edge, the straight bets finish ahead 31.3% of the time, while the parlay finishes ahead 6.3% of the time.
Even a strong 55% bettor finishes ahead with the parlay only 9.2% of the time. The parlay’s higher expected value is real, but it arrives in rare, large wins separated by long losing runs. Surviving those runs takes a bankroll many times the size of each bet.
The favorites parlay trap
Many bettors build parlays from heavy favorites because each leg feels safe. The prices tell a different story.
| Leg | Price | Decimal odds | Implied chance |
| Favorite 1 | -300 | 1.333 | 75.0% |
| Favorite 2 | -250 | 1.400 | 71.4% |
| Favorite 3 | -200 | 1.500 | 66.7% |
| 3-leg parlay | +180 | 2.800 | 35.7% |
A $100 bet wins $180. The prices imply a 64.3% chance at least one favorite loses.
Each favorite is likely to win on its own. Together, they are not. The prices imply only about a 36% chance that all three win, and the parlay pays just +180 for taking that risk. Upsets are not rare. They are simply spread across many games, and a three-leg parlay asks you to dodge all of them at once.
Same-game parlays
Same-game parlays combine bets from a single game, such as a quarterback’s passing yards, a receiver’s touchdown and the game total. Because those outcomes are connected, the sportsbook doesn’t simply multiply the prices. It adjusts the payout with its own model to reflect how the legs depend on each other.
That makes same-game parlays hard to judge. The legs are usually props, which already carry more margin than sides and totals, and the adjustment is not disclosed. The best you can do is price the same combination at more than one book and take the highest payout.
How to build better parlays
If you enjoy parlays, you don’t have to give them up. You can make them cost less.
- Keep them short. Two or three legs keep the house edge at 8.9% to 13.0%, instead of 17% or more.
- Get the best price on every leg. Because prices multiply, a small gain on each leg grows with every leg you add.
- Use small, fixed stakes. Keep parlays a small part of your betting, not the core of it.
- Know the push rules. At most books, a leg that pushes is removed and the parlay pays at the reduced odds, but house rules vary. Check before you bet.
- Go easy on props. Prop legs are often priced at -115 or worse, so they push the house edge up faster than sides and totals.
| Legs | Every leg at -110 | Every leg at -105 | Extra profit |
| 2 | +264 ($264) | +281 ($281) | $17 (6.3% more) |
| 3 | +596 ($596) | +644 ($644) | $48 (8.1% more) |
| 4 | +1,228 ($1,228) | +1,353 ($1,353) | $125 (10.1% more) |
| 5 | +2,436 ($2,436) | +2,737 ($2,737) | $301 (12.4% more) |
Taking -105 instead of -110 on every leg adds $48 to a $100 three-leg parlay and $125 to a four-leg one. On a full college football Saturday, prices on the same game often differ between books, so it pays to compare prices at several books before you lock in each leg.
Parlay FAQ
Are parlays a bad bet?
For a bettor without an edge, yes. Parlays carry a higher house edge than straight bets, and it grows with every leg. For a bettor with a proven edge, parlays can raise expected profit, at the cost of much bigger swings.
What is the best number of legs for a parlay?
Fewer is better for most bettors. At -110 per leg, two legs carry an 8.9% house edge, four legs carry 17.0% and six legs carry 24.4%.
How often do 2-leg parlays hit?
About 25% of the time if each leg is a coin flip, and about 30% of the time if each leg wins 55% of the time.
Why do sportsbooks promote parlays?
Because the margin grows with every leg. A four-leg parlay at -110 gives the book nearly four times the edge of a single bet.
What happens if one leg of a parlay pushes?
At most sportsbooks, the pushed leg is removed and the parlay pays at the odds of the remaining legs, so a two-leg parlay with one push becomes a straight bet. House rules vary, so check yours.
So, are parlays worth it?
As entertainment with small stakes, they can be. As a way to make money, they only work for the rare bettor who wins more than 52.4% of -110 bets over a large sample, and even then with long losing runs. For everyone else, the tables point the same way: fewer legs, better prices and straight bets for the money you care about.
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