Free Bet (SNR) Calculator
For matched betting: work out the lay stake and the guaranteed profit you can lock in from a stake-not-returned free bet.
Enter Free Bet Details
How the Free Bet Calculation Works
A stake-not-returned (SNR) free bet is the usual kind: if it wins, you keep the winnings but not the stake itself. In matched betting you back your selection with the free bet at a bookmaker and lay the same selection at an exchange, locking in a profit whatever the result.
Retention
Retention is the share of the free bet you turn into guaranteed profit, and higher is better. You get the best retention when the back and lay odds are close together and the odds are on the higher side.
Important
Matched betting depends on bookmaker promotions and their terms, which vary and can change. This tool shows the math, not a guarantee, so always read the offer terms and check the live odds before placing anything.