(1) If any person fails to make a report or pay the taxes due as required by this chapter, the department shall add a penalty in the amount of 10 percent of any unpaid tax if the failure is for not more than 1 month, with an additional 10 percent of any unpaid tax for each additional month or fraction thereof during which the failure continues. However, such penalty may not exceed 50 percent in the aggregate of any unpaid tax. Furthermore, in no event may the penalty assessed be less than $10. The department shall collect the tax, together with the penalty and costs, in the same manner as other delinquent taxes are collected.
(2) Any payment that is not received by the department on or before the due date as provided in s. 206.43 shall bear interest at the rate of 1 percent per month, from the date due until paid. Interest on any delinquent tax shall be calculated beginning on the 21st day of the month for which the tax is due, except as otherwise provided in this part. 