The interest on your overdraft will be calculated on a daily basis and charged monthly to your account. The interest is calculated only on the used amount of overdraft. If you did not use the overdraft for a whole month you will not pay any interest. If for some reason you can't pay the interest, the money you have available to borrow will decrease. You have to pay off the loan in full, within 12 months if the total overdraft is less than 3,000 EUR or in 60 months if the overdraft is 3,000 EUR or more.