A. 
All license fees not paid to the City by the person required to remit the same on the date when the same becomes due and payable to the Director of Revenue shall bear interest at the rate determined by Section 32.065, RSMo., from and after such date until paid.
B. 
In case of failure to apply for any license fee required by this Chapter on or before the date prescribed therefor, determined with regard to any extension of time for making an application, unless it is shown that such failure is due to reasonable cause and not the result of willful neglect, evasion or fraudulent intent, there shall be added to the amount required to be shown as tax on such return five percent (5%) of the amount of such tax if the failure is not for more than one (1) month, with an additional five percent (5%) for each additional month or fraction thereof during which such failure continues, not exceeding twenty-five percent (25%) in the aggregate.
C. 
In case of failure to pay the full amount of any license fee due hereunder on or before the date prescribed therefor, determined with regard to any extension of time for payment, unless it is shown, by the applicant, that such failure is due to reasonable cause and not the result of willful neglect, evasion or fraudulent intent, there shall be added to the tax an amount equal to five percent (5%) of the deficiency. The City shall, upon request by a taxpayer, apprise the taxpayer of the factual basis for the finding of negligence, or the specific rules or regulations disregarded if the City assesses a penalty under this Subsection.