KRS 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 ta x 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.