How arbitrage works
An arbitrage opportunity exists when the combined implied probabilities across a set of mutually exclusive outcomes at different bookmakers sum to less than 100%. Distribute your stake proportionally across each outcome and you lock in a guaranteed profit regardless of which outcome wins.
Simple two-way example
Tennis match. Player A: 2.10 at Operator X (implied 47.6%). Player B: 2.10 at Operator Y (implied 47.6%). Combined implied probability: 95.2%. Arb margin: 4.8%.
Stake €100 total. Stake €50 on each at 2.10 odds. Whichever player wins, you return €105. Profit: €5 on €100 staked. Guaranteed.
Problems in practice
- Arbs are small and fleeting. 1-3% is typical, open for minutes.
- Operators restrict arbers. Bet limits reduced, accounts closed.
- You need balanced bankrolls at multiple operators. Capital-intensive.
- Withdrawal friction eats the edge. Fees and delays can erase arb profit.
Is it worth it?
For small-scale casual bettors, probably not. For dedicated arbers with significant capital and time, it's a real approach. Professional arb tools (OddsPortal, RebelBetting, etc.) identify opportunities faster than manual scanning.
Use our arbitrage calculator to check if an opportunity is genuine.
Ready to put this into practice?
Start with a well-reviewed operator. Bet responsibly, never stake more than you can afford to lose.
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