When trying to withdraw money out of your account you need to look at how much you can take out by looking at the Withdrawable Balance at the top of your My Account screen.
How much money do I need to turnover before I can withdraw? Sportsbet does not charge fees on deposits on the understanding that deposits will be turned over at least once, which means if you deposit $50 you'll need to bet $50 before you can withdraw the balance out of the account. Why do I need to turnover funds before I can withdraw?