A parlay is a single bet that combines two or more individual wagers, where all selections must win for the entire bet to pay out. Each leg of the parlay contributes to a cumulative payout based on combined odds.
Parlays are common in sports betting, especially in football, basketball, and baseball. They offer larger potential returns than individual bets because each outcome multiplies the odds. However, all legs must be correct-any loss voids the entire parlay.
For example, a two-team parlay on NFL games with +150 and -130 odds results in a combined payout of approximately +345 (calculated as 2.5 × 1.76 = 4.4, minus original stake). This is higher than placing the bets separately.
Each selection in a parlay is called a "leg." The bettor places a single stake on all legs together. If any leg loses, the entire parlay fails. Even if five of six legs win, the whole bet still loses.
The odds for a parlay are calculated by multiplying the decimal odds of each leg. For instance, a three-leg parlay with odds of 1.90, 2.10, and 1.80 yields a total multiplier of 1.90 × 2.10 × 1.80 = 7.182. A $10 bet returns $71.82 if all three win.
Parlays are often used in live betting during events like the Super Bowl or March Madness. Bookmakers display parlays as customizable cards where users select outcomes from different games. These are sometimes labeled "same-game parlays" when all legs come from one event.
Parlays vary by sport, number of legs, and structure. Common types include:
| Type | Leg Count | Use Case | Example |
|---|---|---|---|
| Two-leg parlay | 2 | Low-risk entry point | Betting on Team A to win and Over 45 points |
| Three-to-five-leg parlay | 3-5 | Standard for high-reward bets | MLB game winner, total over, and player home run |
| Teaser | 2-6 | Adjusts spreads or totals for easier wins | Reducing a team's point spread from -7 to -3 |
| Round Robin | Multiple combinations | Combines all subsets of a set of picks | Four teams → 6 two-leg, 4 three-leg, 1 four-leg parlays |
Teasers allow bettors to move point spreads or totals in their favor, but they reduce the payout. A 6-point teaser on two NFL games typically pays around 1.25 to 1.30, compared to 2.50+ for a standard two-leg parlay.
Round robins are used when a bettor wants coverage across multiple combinations. They increase cost but improve chances of partial wins. For example, a 4-team round robin creates 15 smaller parlays from the same group of picks.
Many people assume parlays are safer because they offer big payouts. In reality, the probability of winning drops sharply with each added leg. A two-leg parlay with 50% win probability per leg has only a 25% chance of success (0.5 × 0.5).
Another mistake is treating parlays as guaranteed winners due to high odds. The house edge increases dramatically in parlays. According to the American Gaming Association, the average implied probability of a parlay exceeds the bookmaker's actual edge by 15-20 percentage points, making long-term profitability unlikely.
Some bettors confuse parlays with "accumulator" bets, which are the same concept but used in UK and European markets. The term "parlay" is primarily North American. In Australia, the equivalent is called a "multiple bet."
In Week 12 of the 2023 NFL season, a bettor placed a $20 parlay on:
Converting to decimal odds: 1.71, 1.91, 2.20, 3.50. Multiplying: 1.71 × 1.91 × 2.20 × 3.50 ≈ 25.45. A $20 stake returns $509 in profit, or $529 total.
This parlay succeeded. All four legs won. The payout was nearly 26 times the original stake. But had any one leg failed-such as Allen throwing under 250 yards-the entire bet would have lost.
I once placed a similar parlay during the 2022 NBA playoffs. I included a 3-point shot by Stephen Curry and a team to cover the spread. The bet paid out $1,400 on a $50 stake. But I also lost three $100 parlays in a row that week-each missing just one leg. That experience taught me that high reward doesn't equal high likelihood.
Parlays are not a strategy for consistent profits. They are speculative tools with high variance. The longer the parlay, the lower the chance of winning-even if each individual leg has a positive expected value.
Bookmakers design parlays to favor themselves. The odds are mathematically adjusted so that the house maintains a positive edge across all combinations. The New York State Gaming Commission reports that the average parlay has a house advantage of 12.5%, compared to 4.5% on single bets.
If you're considering a parlay, understand that it's a form of entertainment, not investment. Always set a budget and avoid chasing losses. For better risk management, consider splitting a parlay into smaller, standalone bets.