{"data":{"id":"us-dc/d.c.-code-47-4201","jurisdiction":"us-dc","citation":"D.C. Code § 47-4201","heading":"Interest on underpayments.","body":"(a)\n(1)\nUnless otherwise provided in this title, if any amount of tax imposed by this title (whether required on a return or to be paid by stamp or by some method) is not paid on or before the last date prescribed for payment, interest on the unpaid amount, at the underpayment rate set forth in subsection (d) of this section, shall be paid for the period from the last date prescribed for payment to the date paid.\n(2)\n(A)\nThe last date prescribed for payment shall be determined without regard to any extension of time for filing a return required under this title.\n(B)\nIn the case of taxes payable by stamp and in all other cases in which the last date for payment is not otherwise prescribed, the last date for payment shall be the date that the liability for the tax arises.\n\n(b)\n(1)\nExcept as provided under paragraphs (1) and (2) of this subsection, interest shall be imposed at the underpayment rate set forth in subsection (d) of this section on an assessable penalty or addition to the tax only:\n(A)\nIf the assessable penalty or addition to the tax is not paid within 21 calendar days after the date of notice and demand, and\n(B)\nFor the period from the date of the notice and demand to the date of payment.\n(2)\nInterest shall be imposed at the underpayment rate set forth in subsection (d) of this section on an addition to tax imposed under §§ 47-4201, 47-4202, or 47-4203 [see § 47-4213] for the period which:\n(A)\nBegins on the date of the return of the tax with respect to which the addition to tax imposed is required to be filed (including extensions); and\n(B)\nEnds on the date of payment of the addition to tax.\n(3)\nInterest shall not be imposed on an underpayment of estimated tax required to be paid under § 47-4215.\n\n(c)\nInterest imposed under this section on an unpaid tax, assessable penalty, or addition to tax shall be paid upon notice and demand, and shall be assessed, collected, and paid in the same manner as a tax.\n\n(d)\nThe underpayment rate shall be as follows:\n(1)\n13% per year, simple interest, from January 1, 2001 to December 31, 2002;\n(2)\n10% per year, compounded daily, beginning January 1, 2003.","path":["Title 47. Taxation, Licensing, Permits, Assessments, and Fees. [Enacted title]","Chapter 42. Interest and Penalties.","Subchapter I. Interest."],"source_url":"https://code.dccouncil.gov/us/dc/council/code/sections/47-4201","current_through":"2026-08-20 (D.C. Law 26-175)","vintage":"","retrieved_at":"2026-08-29T05:44:07Z","sha256":"3d945a898f4798f3e33a117445e2d71b0db7af460ee807db650e2916f1398717","source_id":"us-dc","stale":false,"prev":"us-dc/d.c.-code-47-4111","next":"us-dc/d.c.-code-47-4202"},"notice":"GroundRules: Original legal text. Not legal advice."}