Calculator
Frequently Asked Questions
What is matched betting?
Matched betting is a technique where you back a selection at a bookmaker and lay the same selection on a betting exchange. By covering both outcomes, you can extract free bet bonuses and promotions with minimal risk. Profits from matched betting are tax-free in the UK as gambling winnings are not subject to income tax.
How is the lay stake calculated?
The lay stake is calculated using the formula: Lay Stake = (Back Stake × Back Odds) ÷ (Lay Odds − Commission Rate). This ensures that whatever the result, the net outcome is equal, converting the free bet or qualifying loss into a guaranteed profit.
What is a qualifying bet vs a free bet?
A qualifying bet is a real-money bet placed to unlock a free bet offer — it typically results in a small loss. A free bet is the bonus stake awarded by the bookmaker. With a stake-not-returned (SNR) free bet, you only win the winnings, not the original stake back, which affects your profit calculation.
What exchange commission rate should I use?
Betfair Standard Market charges 2–5% depending on your discount rate. Smarkets charges 2%. Matchbook charges around 1.5%. Use the actual commission percentage shown in your exchange account for the most accurate results.
Is matched betting legal in the UK?
Yes. Matched betting is entirely legal in the UK. It exploits promotional offers using normal betting activity. Bookmakers may limit or close accounts of consistently profitable matched bettors, but the practice itself is perfectly legal and tax-free under UK gambling law.