Risk-free, on paper.
Find the stake split that pays the same whichever outcome wins. We'll tell you when there isn't one — and what to watch out for if there is.
Arbitrage Calculator
Most US markets (moneyline, spread, total) are 2-way. Soccer match-result lines including the draw are 3-way.
The total you want to invest across all outcomes.
Stake split
Bet each amount on the corresponding outcome.
| Outcome | Decimal | Bet | If it wins |
|---|
3-way arbs are rarer and more prone to stale-line false positives. By the time you've placed bets on three different sportsbooks, at least one line may have moved — verify all three odds simultaneously before pulling the trigger.
Show the math
Read this before you arb
What is arbitrage betting?
Arbitrage is betting every outcome of an event across different sportsbooks at odds that, taken together, guarantee a profit no matter who wins. The math is straightforward — split your stake so the payout is identical regardless of result.
Arbs exist because sportsbooks set their lines independently. Occasionally those lines disagree enough that the combined implied probabilities sum to less than 100% — that gap is your edge.
Sportsbook account-limiting risk
This is the thing arb bettors actually get hit with. Sportsbooks aren't dumb. They track betting patterns, and arbing — frequent bets on both sides of correlated markets at suspiciously good prices — is one of the most obvious signals.
Books respond by silently capping your max bet (often down to $10–$50), refusing certain markets, or closing your account outright. The clean math of arb gets messy fast when you can no longer place the leg you need at the size you need.
Sharp arb bettors mitigate this with bet-sizing discipline, "wash" recreational bets to look casual, multiple accounts in different names (rule-violating at most books), or by moving to exchanges. None of it is free.
Stale lines — the arb you saw 30 seconds ago may not exist
Lines move constantly, especially close to game time and in-play. A 3% arb that pops up on your screen can vanish before you've finished funding the second sportsbook's bet slip.
If you don't place all legs essentially simultaneously, you risk being stuck with one leg at the original odds while the other has moved against you. What was a guaranteed +3% becomes a possible −5%.
The fix is preparation: accounts funded in advance, bet slips loaded with stake amounts pre-calculated, and the discipline to abort the whole bet if even one leg moves before you confirm.