What Is a Parlay Bet? — Sportsbook Parlays Explained
A parlay is a single sportsbook bet that combines two or more individual wagers (called 'legs'). To win the parlay, every leg must hit. The payout multiplies — a 4-leg parlay at -110 each pays roughly 12-1 if all four legs win, versus the 1-1 payout you'd get on each leg individually. The catch: hit rate drops geometrically with each leg added.
Why do sportsbooks love parlays?
Sportsbooks earn far higher hold (theoretical profit margin) on parlays than on straight bets — typically 25-35% on a 4+ leg parlay versus 4.5% on a single point spread. Even though individual leg odds are 'fair,' multiplying multiple house edges compounds against the bettor.
What's a same-game parlay (SGP)?
An SGP is a parlay where every leg is from the same single game — e.g., Patrick Mahomes 250+ passing yards AND Travis Kelce a touchdown AND Chiefs to win. Books used to ban these because the legs are correlated (if Mahomes throws for 350, Kelce probably scored). Now most books offer them, but with adjusted (worse-for-you) odds to bake in the correlation.
Should I bet parlays?
From an EV (expected value) perspective, parlays are -EV for almost every recreational bettor — the house edge compounds. They're entertainment products. If you're a sharp who has identified mis-priced legs (e.g., a correlated SGP the book under-adjusted), parlays can have positive EV, but for the average degen they're a tax on hope.
What's the biggest parlay payout ever?
Documented record: a $100 ticket on a 16-leg NHL parlay paying ~$580K in 2017. There are larger un-verified anecdotes from offshore books. Most legendary parlays run 8-15 legs with 4-6-figure payouts — they go viral on Twitter when they hit.