Rupert, you're correct that the amount you get after tax is dependent on how much you actually earn, i.e. the higher it goes over $180K, the lower the percentage becomes. I meant to say that if your income just gets you into the highest rate (i.e. you earn $180K and no more) then you will end up with about 68%. BTW that 68% also includes the Medicare Levy having been deducted too.