This site exists to answer one question with real numbers: what does a parlay bet actually pay, and why? I'm Gavin Merritt, and I've spent nine years reading state gaming-commission filings, operator license applications, and sportsbook terms-of-service documents so you don't have to.
Who writes this, and why should you trust the math?
My background is in US sports-betting regulation — the kind of work that means cross-referencing the Pennsylvania Gaming Control Board's quarterly handle reports against what a sportsbook advertises on its homepage. Every dollar amount, every odds conversion, and every parlay payout figure on this site comes from documented sources: regulator filings, operator terms, or published academic and industry data. If I can't source a number, I say so explicitly.
The parlay bet examples and payout walkthroughs on the homepage are built from the same decimal-conversion method used by professional odds calculators — convert American odds to decimal, multiply each leg together, multiply by stake, subtract stake for net profit. No invented figures, no rounded-up promises.
What you'll find on this site
The parlay FAQ covering everything from leg definitions to tax obligations handles the questions I see most often from bettors who are new to multi-leg wagering. Beyond that, you'll find step-by-step calculation guides, a free parlay calculator, a breakdown of every parlay format including same game parlays and round robins, and a plain-language look at why parlays carry an average 24% house edge — roughly five times the vig on a single-game wager.
I also cover the operator side: which US sportsbooks pay out fastest and structure their parlay promos most transparently, including the fine print that trips bettors up (BetMGM bonus bets expire in 7 days and are unavailable in several states, for instance). And because every parlay winner owes federal taxes on their winnings, there's a dedicated section on when a W-2G gets triggered — the $600 and 300× rule.
Responsible gambling commitment
Parlays are mathematically the highest-vig bet type at most sportsbooks, accounting for over 70% of online sportsbook revenue. I present that fact plainly rather than bury it. The National Council on Problem Gambling recommends setting a firm budget and time limit before any session; the 800-GAMBLER helpline is available 24/7 if wagering ever stops feeling like entertainment. Must be 21+ in most states. Gambling problem? Call 1-800-GAMBLER.
Questions, corrections, or sourcing challenges are welcome. If a number on this site is wrong, I want to know — and I'll update it with a sourced correction, not a quiet edit.