Lay Bet Calculator

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.

Liability and Bankroll

The number that catches people out with lay betting is liability. When you lay a selection, you're accepting someone else's bet, so your risk is the stake multiplied by the odds minus one. Laying at 10.0 for a stake of 10 puts 90 at risk. Long-priced selections tie up a lot of money for a small potential gain.

What That Means in Practice

Lay betting needs more available capital than backing does, and the higher the odds, the more of your balance sits locked in a single position. That's a bankroll consideration as much as a strategy one, and it's the main reason matched betting guides suggest starting with shorter-priced selections.

Commission and Liquidity

Exchanges take commission on net winnings, so factor it in before deciding whether a lay is worthwhile. Also check how much money is actually available at the price you want. An attractive lay price with little liquidity behind it can only be matched in part, which leaves you half covered rather than fully positioned.