Lay Bet Calculator

Lay stake, liability and exchange commission

A lay bet means you are betting that a selection will not win. The key risk measure is liability: the amount you lose if the laid selection wins. Liability equals the lay stake multiplied by decimal odds minus one.

If the selection loses, the gross win is normally the lay stake, with exchange commission deducted from profitable markets according to the rate you enter.

How to interpret the numbers

• Liability is the amount that must be covered if the selection wins.
• Net win if the selection loses is the lay stake after the entered commission.
• If you provide a bankroll, the calculator also shows liability as a percentage of that bankroll.

Exchange rules matter

Commission structures, premium charges, partial matching, reduction factors and market settlement rules differ between exchanges. Treat the calculation as a position-size check and confirm the actual exchange screen before submitting an order.