Matched Betting Calculator

It works out how much to lay on a betting exchange so you finish with the same result whichever way the event goes. A £10 qualifying bet at 3.00, laid at 3.10 with 2% commission, needs a lay stake of £9.74 (liability £20.45) and results in −£0.45 either way.

A normal bet, often required to unlock a free bet. Because back and lay odds differ and exchanges charge commission, a qualifying bet usually costs a small amount — the “qualifying loss”.

For a stake-not-returned free bet the lay stake is smaller, because the stake is not part of the return. A £10 SNR free bet at 5.00, laid at 5.20 with 2% commission, locks in £7.57 — 75.68% of the free bet.

The amount you could lose on the exchange if the selection wins: lay stake × (lay odds − 1). You need that amount in your exchange account.

The arithmetic removes the outcome risk, but mistakes (wrong odds, odds moving before both bets are placed, voided bets, account restrictions) can still cost money. Read each offer’s terms carefully.