The garage mechanic exhaled with a muted whistle and shook his head. “It’s not going to be cheap,” he said He was right. Paying for the repairs to my car at the time – an old Vauxhall Nova – made a big dent in my student budget. But just how much of the total bill was “girl tax”? New research from website ClickMechanic reveals that garages charge women up to a third more than male customers for the same repairs.