Matched Betting Calculator
Enter a free bet's value plus the back and lay odds to see exactly how much guaranteed profit you can extract from it.
Lay stake
£17.94
Liability
£57.42
Guaranteed profit
£17.58
Extraction rate
70.3%
Extraction rate is the guaranteed profit as a % of the free bet's face value — free bets never extract 100% since the stake itself isn't returned.
FAQs
- Why don't I extract 100% of a free bet's value?
- Because the free bet's stake is never returned, even if it wins — you only get the winnings. Hedging that with a lay bet costs a little relative to the free bet's face value, so the typical extraction rate is around 70–80%, higher at bigger odds.
- Should I use this or the lay calculator?
- Use this one for free bets specifically (stake not returned). Use the lay calculator for a normal cash qualifying bet, where the stake is returned if it wins — the maths is genuinely different.