Short answer: placing bets at licensed sportsbooks is legal where sports betting is legal, and arbitrage is simply placing bets at more than one of them. There is no US law against betting both sides of a game at different books. But "legal" and "welcome" are different things.
Why arbitrage is legal
Arbitrage involves:
- Holding accounts at legal, licensed sportsbooks in your state
- Placing bets at the prices those books choose to offer
- Betting different outcomes at different books
None of that breaks a law. You are not manipulating anything, sharing accounts or using inside information. You are simply choosing prices. (This is general information, not legal advice; rules vary by state and can change.)
What can get you in trouble
Arbitrage itself is not the problem. These are:
- Betting from a state where a book is not licensed or using location spoofing
- Multiple accounts at the same book, or accounts in someone else's name
- Offshore, unlicensed books, where you have little protection if they refuse to pay
- Betting on events you are involved in, or using non-public information
- Bonus abuse that violates a promotion's terms (for example, multiple sign-ups)
Stick to one account per licensed book, in your own name, from a state where it is legal.
What sportsbook terms say
Licensed books' terms generally let them:
- Limit the maximum you can bet on any market
- Decline bets
- Close accounts at their discretion
- Void bets placed on obvious pricing errors ("palpable errors")
Some terms mention arbitrage or "bonus abuse" explicitly. Even when they do not, books can restrict accounts they consider unprofitable. Your existing funds and settled winnings are generally protected by state regulation, but your ability to keep betting large amounts is not. (Do sportsbooks limit arbers?.)
Palpable errors and voided arbs
When an arb exists because one book posted an obviously wrong price, that book may void the bet under its rules. If you have already placed the other leg, you are left with an unhedged bet. This is one of the main risks of chasing large arbs. (Arbitrage betting risks.)
Taxes
Arbitrage profits are gambling winnings. In the US, gambling winnings are generally taxable income, and how losses can be deducted depends on current federal and state rules. Keep complete records and talk to a tax professional. (Sports betting taxes and records.)
Arbing responsibly
- Only use books licensed where you are located; OddsHype shows only those books
- Never use someone else's account
- Read each book's house rules for the markets you arb
- Accept that limits are part of the game
- Keep records of every bet
Frequently asked questions
Is arbitrage betting illegal in the US?
No. Betting at licensed sportsbooks where sports betting is legal is lawful, including betting opposite sides at different books.
Can a sportsbook ban you for arbitrage betting?
Books can limit or close accounts at their discretion under their terms, and many restrict customers they identify as arbitrage bettors.
Can a sportsbook refuse to pay an arbitrage bet?
Licensed books must settle valid bets under state rules, but they can void bets placed on obvious pricing errors according to their house rules.