Advance Deposit Wagering — ADW for short — is the legal framework that lets you bet on horse racing online or by phone in roughly 40 US states. The key rule: your account must be funded before you place any bet. No credit is extended. Ever.
Where Is Online Horse Racing Betting LegWhat does "advance deposit" actually mean?
It means exactly what it sounds like. You deposit money first, then wager. Think of it like a prepaid debit card for horse racing. I load $50 into my account, bet $10 on a race at Saratoga, and my balance adjusts in real time. If I win, the payout lands in the same account. If I lose, it's gone from my balance immediately.
No ADW platform can extend credit to bettors. That's federal and state law, not just policy.
How is ADW licensed?
Most licensed ADW providers hold licenses issued out of Oregon or North Dakota. Those licenses authorize the platform to accept online bets in states where local law also permits it. When you sign up with a platform like TwinSpires or TVG, you're betting through one of those licensed entities — not some offshore site operating in a gray area.
The risks of using offshore racebooks are real. No license means no consumer protection and no recourse if something goes wrong.
What federal law governs ADW?
The Interstate Horseracing Act provides the federal foundation for cross-state pari-mutuel wagering. On top of that, the Horseracing Integrity and Safety Act (HISA), signed in December 2020, created uniform national standards for racing safety, medication, and anti-doping. HISA moved those responsibilities away from a patchwork of state agencies into a single national framework.
Which states allow online ADW betting?
About 40 states permit it. Confirmed legal states include New York, Kentucky, California, Pennsylvania, New Jersey, Michigan, Illinois, Ohio, and many others. States that do not allow online ADW include Alaska, Georgia, Hawaii, Mississippi, South Carolina, and Utah. Nevada permits only in-person pari-mutuel wagering.
New Jersey requires residents to use the 4NJBets platform specifically. Minnesota residents cannot wager on in-state tracks like Canterbury Park through national ADW platforms. See the full state-by-state ADW legal guide for details on every jurisdiction.
How old do you have to be?
Most states set the minimum age at 18. Iowa and Washington require 21+ on most platforms. DRF Bets also lists 21+ requirements in Alabama, Arizona, Kansas, New Hampshire, and North Dakota. Always check your state before signing up. The ADW age limits and platform restrictions by state page breaks this down operator by operator.
How does the wagering pool work?
ADW uses the pari-mutuel pool system. You're not betting against the house. You're betting against other bettors in a shared pool. The track deducts its takeout — roughly 16–17% for Win/Place/Show pools, around 22% on average across all bet types — and divides what remains among the winners.
That's why odds shift right up until post time. More money on a horse means lower payouts for that horse's backers.
Which platforms should I consider?
The major licensed ADWs available across most legal states include TwinSpires (owned by Churchill Downs), TVG (owned by Flutter Entertainment), DRF Bets, NYRA Bets, FanDuel Racing, DK Horse, AmWager, BetRivers, and BUSR. Each carries different welcome offers and track coverage. My full breakdown is in the best horse racing betting apps comparison.
Must be 18+ (21+ in some states). Gambling problem? Call 1-800-GAMBLER.
Do ADW sites accept international races?
Yes. All licensed US ADW platforms are permitted to accept bets on international races — UK, Ireland, Japan, UAE, Australia — per operator track listings and ADW licensing terms. I've bet the Cheltenham Festival and the Japan Cup from my US account without any issue.
What taxes apply to ADW winnings?
All winnings are taxable income regardless of the amount. A W-2G form is issued when winnings are 300-1 or greater and pay at least $600. Kentucky applies a 1.5% ADW excise tax on all amounts wagered by state residents. Minnesota withholds 9.85% on pari-mutuel winnings. The full US tax rules for horse racing winnings covers federal and state obligations in detail.