Please note that Matchbook commission rate has increased. Also, from now on you will no longer pay commission on losing bets. Make sure you update your settings if you are betting with Matchbook.
“Matchbook charges United Kingdom, Republic of Ireland, Channel Islands and Isle of Man residents a 2% commission only on net profit on a market. Customers residing outside of these regions will be charged a 4% commission only on net profit on a market. Matchbook does not charge a commission on losing bets.” Read more here
To change commission settings in the Windows software go to Options/Bookmaker setup, select Matchbook in the list and enter the correct commission percentage.