No penalty shall be charged for city taxes paid on or before the 14th day of September. The council shall provide, by ordinance, the tax payment schedule for taxes paid after September 14th, and the amount of penalty. Collection fees or interest charges, if any, to be paid thereafter shall not exceed the limit allowed by statute. Such charges shall belong to the city and constitute a charge and shall be a lien against the property to which the taxes apply, collectible in the same manner as the taxes to which they are added.