A parlay is a single wager that chains two or more individual bets — called legs — together, and every single leg must win for the ticket to pay out anything at all. The compounding math is what makes parlays attractive: three point-spread picks at -110 each produce roughly +596 combined odds, compared to a combined profit of around +273 if you placed all three as separate straight bets. That gap between the two figures is the whole story of why parlays exist, and why the house loves them just as much as bettors do.
What Is a Parlay Leg?
Each individual selection on a parlay ticket is called a leg. A leg can be a moneyline (pick a winner outright), a point spread (win by a set margin), an over/under total, a prop bet on a player stat, or even a futures wager. Operators like FanDuel, DraftKings, and Hard Rock Bet let you mix all of those types on a single ticket.
The moment you add a second leg, you are no longer betting on one outcome — you are betting on a chain. Win the first, win the second, win the third. Miss any one of them and the entire ticket is worth zero, no matter how many other legs came through. That all-or-nothing rule is the single most important thing to understand before building a parlay.
How Do Parlay Odds Compound?
The calculation works by converting each leg's American odds into decimal form, then multiplying all the decimals together. If you want the full step-by-step walkthrough — including the American-to-decimal conversion formula — the parlay odds calculator math guide covers every arithmetic step with examples.
In short: a leg priced at -110 converts to a decimal of roughly 1.909. Multiply three of those together and you get approximately 6.96, which translates back to about +596 in American odds. A $100 wager at +596 returns roughly $696 total — $596 profit plus your $100 stake back.
For a detailed dollar-and-cents breakdown, the 3-team parlay example runs through exactly how a $100 bet at -110 per leg reaches that ~$696 payout figure.
What Types of Parlays Can You Build?
Beyond a straight parlay, there are a few important variants. A Same Game Parlay (SGP) links multiple outcomes from one game — say, a team spread plus a player prop — but sportsbooks often adjust the odds downward to account for statistical correlation between the legs. A Round Robin generates a series of smaller overlapping parlays from the same pool of selections, so a single losing leg does not wipe out every ticket. A teaser lets you move the point spread in your favor across all legs in exchange for lower combined odds. The every parlay type explained guide goes deeper on each of these.
Why Does the House Edge on Parlays Run So High?
The average vig on a parlay runs approximately 24% — far above the roughly 4.5% on a standard single-game spread bet. Parlays account for over 70% of online sportsbooks' revenue, which tells you something important about who benefits most from the structure. The why parlays lose so often page explains how that 24% vig compounds across legs and why the all-or-nothing rule makes consistent long-term profitability extremely difficult.
If you want to compare the math directly, the parlay vs. single bet breakdown puts both strategies side by side with identical stakes and odds.
What Happens if a Leg Ties?
A push — when a leg lands exactly on the number — typically removes that leg from the parlay, reducing it by one leg at adjusted odds. It does not void the entire ticket. Per CBS Sports reporting, this is standard across most major US sportsbooks, though you should confirm the specific push policy with your operator before placing. The parlay push rules page covers every scenario in detail.
Where Are Parlay Bets Legal?
Parlay wagering is only available where a state has legalized sports betting. More than 30 states plus Washington D.C. had done so as of 2024, following the Supreme Court's 2018 PASPA repeal. Delaware had legal parlay wagering via the Delaware Lottery as far back as 2009. States like Mississippi and Montana permit retail-only sports betting, meaning online parlay wagering is not available there. California has not legalized sports betting at all after two ballot measures failed in November 2022. The state-by-state legal parlay status page tracks where you can legally place a ticket online right now.
Minimum age is 21 in the vast majority of legal states, though some tribal compacts may permit 18+ wagering depending on their specific terms. Must be 21+ to wager at most US sportsbooks. Gambling problem? Call 1-800-GAMBLER.
Do Parlay Winnings Get Taxed?
Yes. All gambling winnings — including parlay payouts — are taxable federal income. A sportsbook issues a W-2G when sports-betting winnings are $600 or more and the payout is at least 300 times the amount wagered. States may also impose their own income tax on top of that. The W-2G parlay winnings guide explains exactly when the threshold is triggered and what records the IRS expects you to keep.
Ready to Run Your Own Parlay Numbers?
The fastest way to see what any combination of legs would actually pay is the free parlay calculator — enter your legs and odds, and it returns the exact payout math instantly. For a broader look at which operators offer the fastest withdrawals and the most useful parlay promos, the top parlay sportsbooks comparison covers payout speeds at FanDuel, DraftKings, BetMGM, and others side by side. And if you still have foundational questions, the parlay bet FAQ covers everything from "what is a leg?" to "what do I owe in taxes?" in one place.
The parlay bet example home page is also a good starting point if you want a single-page summary before diving into the calculators and state-by-state details. The National Council on Problem Gambling offers free, confidential support if wagering ever feels out of control; you can also reach a counselor 24/7 through 800-GAMBLER.org.
Articles in This Section
| 3-Team Parlay Example: How a $100 Bet at -110 Returns ~$696 | Exact decimal-odds multiplication for three -110 legs: combined American odds of roughly +596 and a $696.29 total return on a $100 stake. |
| How to Calculate Parlay Odds: American to Decimal Conversion Step by Step | Convert -300, -200, -150 American odds to decimals, multiply them, and land on +233 combined parlay odds — worked out line by line. |
| Why Parlays Lose So Often: 24% Vig and the All-or-Nothing Rule | Parlays generate over 70% of sportsbook revenue because the effective vig averages 24% — nearly six times the ~4.5% on single-game bets. |