Maryland Code, Tax-General § 13-602

(a) Except as provided in subsections (b) and (c) of this section, a tax collector shall assess interest on unpaid tax from the due date to the date on which the tax is paid if a person who is required to estimate and pay digital advertising gross revenues tax, financial institution franchise tax, public service company franchise tax, or income tax under § 7.5-301, § 8-210(b), § 8-405(b), or § 10-902 of this article:

(b) Interest may not be assessed on the underestimation of individual income tax if:

(c) A tax collector may not assess interest on unpaid individual income tax under subsection (a) of this section if the amount of unpaid income tax is less than one-half the amount specified in § 6654(e)(1) of the Internal Revenue Code.