Lay Bet Calculator
Calculate lay bet liability and potential outcomes for betting exchanges like Betfair.
Lay Bet Details
The amount the backer is risking
The odds you're offering to lay
Betfair: 5%, Smarkets: 2%
What is Lay Betting?
Lay betting means betting against an outcome. On a betting exchange, you act as the bookmaker, if the selection wins, you pay out; if it loses, you keep the backer's stake (minus commission).
Liability
Your liability is what you pay if the selection wins. Liability = Backer's Stake × (Odds - 1). Laying 10 at odds of 3.00 means 20 liability.
Matched Betting
Matched betting uses back bets (at a bookmaker) and lay bets (at an exchange) to guarantee profit from free bets and promotions. The back and lay cancel each other out, leaving you with the bonus value.