Hello, landlord, as long as you pay the minimum repayment amount, it will not be overdue, but it will generate interest. The daily interest rate is about five ten thousandths of the full amount (note that it is the full amount, not the unpaid part), but the calculation of interest is more complicated because of the interest factor. If you only owe one month, you don't have much money. Just multiply by the total amount of your bill for the month.