What is Arbitrage Betting?
Exploit odds differences across sportsbooks to guarantee a profit on every bet, regardless of the outcome.
Arbitrage Betting Explained
Arbitrage betting (or "arbing") is a strategy where you place bets on all possible outcomes of an event across different sportsbooks, taking advantage of differing odds to guarantee a profit no matter what happens. It works because different sportsbooks set their own odds independently, and sometimes those odds create a gap that a sharp bettor can exploit.
For example, if Sportsbook A has Fighter X at +150 and Sportsbook B has Fighter Y at +120, the combined implied probability might fall below 100%, creating an arbitrage opportunity.
How to Find Arbitrage Opportunities
To find arbs, you need to compare odds across multiple sportsbooks simultaneously. The key formula is:
Implied Probability = 1 / Decimal Odds
If the sum of implied probabilities for all outcomes is less than 100%, you have an arbitrage opportunity. For a two-way market (like a moneyline fight), add the implied probability of Fighter A from one book and Fighter B from another. If the total is under 1.0 (100%), that's your arb.
Tools like KnockoutOdds make this easy by displaying odds from 15+ sportsbooks side by side, so you can spot these gaps instantly.
Arbitrage in MMA & Boxing
Combat sports are particularly good for arbitrage because:
- Fewer outcomes — Most fights are two-way moneylines (no draws in MMA), making the math simple.
- Line variation — Sportsbooks disagree more on fight odds than mainstream team sports.
- Market inefficiency — Smaller betting markets mean odds move slower, giving you more time to act.
However, arb margins in combat sports are typically small (1-3%), so you need to bet significant amounts to make meaningful profit.
Risks and Limitations
While arbs guarantee a mathematical profit, there are practical risks:
- Account limits — Sportsbooks flag and limit arbers quickly. Consistent arbing will get your accounts restricted.
- Odds movement — Odds can change between the time you place your first bet and your second bet, eliminating the arb.
- Fight cancellations — If a fight is cancelled, one book might void while the other doesn't, leaving you exposed.
- Max bet limits — You might not be able to place enough on one side to balance the arb.
Frequently Asked Questions
Is arbitrage betting legal?
Yes, arbitrage betting is completely legal. You're simply placing bets at different sportsbooks. However, sportsbooks don't like it and may limit or close your account if they detect arbing patterns.
How much can you make from arbitrage betting?
Typical arb margins are 1-3% per bet. With disciplined execution and enough bankroll across multiple sportsbooks, experienced arbers can make a few hundred to a few thousand dollars per month. The main constraint is sportsbook account limits.
What tools do I need for arbitrage betting?
You need an odds comparison tool (like KnockoutOdds) that shows real-time odds from multiple sportsbooks, an implied probability calculator, and accounts at several sportsbooks with funded balances.