Exchange Betting:The Other Side of the Bet

What is a betting exchange?

A betting exchange matches people who want opposite sides of the same bet. Exchange betting works like this: you back an outcome if you think it happens, or lay it if you think it does not, and another customer has to take the other side. The exchange matches the two of you. It is not a bookmaker, and it does not book the bet itself — the risk stays with the people on the ticket.

How it differs from a sportsbook

• Who sets the price. On a sportsbook you take the bookmaker’s number. On an exchange, other users set the prices on the ladder; you can take one or offer your own. If nobody takes your price, your stake waits unmatched.

• How the operator is paid. A bookmaker builds its margin into the price, so you pay it whether the bet wins or loses. Most consumer exchanges, as of 2026, take commission as a percentage of profit on a settled market instead. Lose the market and you typically owe no commission on it.

• Laying means liability. If you lay and the outcome happens, you pay the backer. That amount is your liability, and it is set aside until the market settles. A £10 lay at 2.60 needs £16 set aside: (2.60 − 1) × £10. Those are teaching numbers, not a live price.

• Depth matters. A price is only useful if someone will take it. Leave the main leagues and the book thins.

UK exchanges and US exchange-style venues

Classic UK and European exchanges use a back-and-lay ladder. US exchange-style sports venues such as ProphetX and Novig usually trade event contracts, often priced toward $0 / $1, on a CFTC-regulated book. Matching is still matching, but the ticket is a contract, the age gate is often 21, and eligibility depends on where you are when you trade — not only where you live.

The worked examples are in How an exchange takes a bet and Back and lay.