For failure to pay a license fee when due, the Tax Collector shall add a penalty of ten (10) percent of the license fee on the last day of each month after the due date thereof, providing that the amount of such penalty to be added shall in no event exceed one hundred (100) percent of the amount of the license fee due. (Ord. 1030 § 2(4), 2018; Ord. 265 § 42, 1959)