We have one account which my wife looks after, paying the bills etc. I get an allowance which covers just more than my weekly needs. If I buy oil for my motorcycle, it comes from my account, if I buy oil for the lawnmower it comes out of the household account...well, no, I end up paying for oil and fuel for the lawnmower, but shouldn't. My wife has her own business account (and name, no taking my name stuff) which she manages too. I'm better with money, because I just don't spend it, but having dyscalculia I don't grasp the obvious detail of how it works, so someone who passed some maths exams is a better choice.