Are Parlays Worth It? The Honest Math

Parlays are usually not worth it as a steady strategy because the house edge compounds with every leg, so the payout is smaller than the fair, no-vig odds of hitting every leg would pay. They can be worth it only when each individual leg is a positive-value bet on its own, which is rare.

Are parlays worth it compared with straight bets?

Definition. A parlay links two or more bets into one ticket that pays only if every leg wins.

Worked example. Two legs at -110, $100 staked. Each leg is 1.9091 in decimal, so the ticket pays 1.9091 x 1.9091 = 3.6446, or $364.46 back ($264.46 profit). If both legs are true 50 percent chances, the expected loss is 0.25 x $264.46 minus 0.75 x $100 = -$8.89 per $100, against -$4.55 for a single -110 bet.

Why the house loves parlays

Every leg of a parlay carries the book's margin, and those margins multiply. A three-leg parlay of -110 bets pays about 6 to 1, but the fair payout without the vig would be closer to 7 to 1. That gap, hidden inside the multiplied margin, is why parlays are one of the most profitable products for sportsbooks.

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When a parlay can make sense

A parlay is only defensible when every leg is already a bet you would make on its own at a good price, and ideally when the legs are correlated in your favor where the book allows it. Parlaying picks you do not otherwise like, just for the payout, is where bettors bleed money over time.

A smarter alternative

If you want parlay-style upside with less all-or-nothing risk, a round robin spreads your picks across smaller parlays so one miss does not bust everything. Better still for long-term results: bet your best plays straight, get the best number on each, and let positive expected value compound.

Frequently asked questions

Why are parlays a bad bet?

The house margin compounds with each leg, so the payout is smaller than the fair, no-vig odds of hitting every pick would pay. The more legs, the worse the deal.

When is a parlay worth it?

Only when each leg is a positive-value bet you would place on its own. Parlaying picks purely for the payout is a long-term loser.

Your next step

1Learn itAre Parlays Worth It (this page)
2Apply itHow to bet a parlay →
3Run itParlay Calculator →
4Master itDay 20: Sharp action, handle and line movement →

Related terms

Parlay: A parlay combines two or more bets into a single ticket that only pays if every selection wins.
Round Robin Bet: A round robin bet takes three or more selections and automatically splits them into every smaller parlay combination, placing each as its own wager.
Expected Value (+EV): Expected value, or EV, is the average amount a bet would win or lose if you placed it many times over.

Parlay Calculator →Full glossary →

21+. For entertainment and educational purposes, not financial advice. If gambling stops being fun, take a break. 1-800-GAMBLER. Regulated US books only.