Kentucky Revised Statutes Title XI. Revenue and Taxation § 141.985.Interest on tax not paid by date due; addition to tax provided in KRS 141.305 and 141.044 to be considered a penalty

(1) Except for the addition to tax required when an underpayment of estimated tax occurs under KRS 141.044 and 141.305, any tax imposed by this chapter, whether assessed by the department, or the taxpayer, or any installment or portion of the tax is not paid on or before the date prescribed for its payment, there shall be collected, as a part of the tax, interest upon the unpaid amount at the tax interest rate as defined in KRS 131.010(6) from the date prescribed for its payment until payment is actually made to the department.

(2) Interest shall be assessed, collected, and paid in the same manner as if it were a deficiency.

(3) For purposes of this section, any addition to tax provided in KRS 141.044 and 141.305 shall be considered a penalty.