Calculate the guaranteed profit you can lock in from any free bet offer using a lay bet at an exchange.
Matched betting uses a free bet at a bookmaker combined with an opposing "lay" bet at a betting exchange to guarantee a profit regardless of the outcome. Because you're covering both outcomes, the result is a near risk-free profit.
Stake Not Returned (SNR) is the most common type — you only receive winnings, not your original free bet amount back. These typically yield 70–80% of the free bet as profit.
Stake Returned (SR) free bets return the stake too, making them more valuable. You can typically extract 85–95% as profit.
The closer the back odds and lay odds are, the higher your profit. Aim for a difference of less than 0.20 between back and lay odds for best results.