By itself, the bookmaker will never charge any fees to the winning customer - how much money you have on your account, you can withdraw as much. However, among those payment systems, cooperates with Bwin, there are at least two, which charge a fee even with incoming payment. They are relatively unpopular in the UK, but you have the right to know about them: Diners Club (2,5 Euros per payment) and Webmoney (3% fee).