When inputting your figures into the matched betting calculator, the commission (which is expressed in percent) determines how much the exchange profits from your bets. An exchange makes profit as a percentage often 2% or 5% of your returned winnings, this funds the entire exchange thus an exchange is able to offer much better market rates compared to a bookmaker.
These numbers are input into the matched betting calculator so you know exactly how much is due from each win or loss on your qualifying or free bets.
BetFair exchange 5%
Smarkets 2%
Matchbook 0.75% or 1.5% (dependant on if you fulfil a bet rate, or offer a bet rate).
Right now, members of Oddsmonkey can enjoy 0% commission at Smarkets and Matchbook. Take advantage of this great offer to minimize your qualifying losses on exchange bets.