D.C. Mun. Regs. tit. 9, r. 9-147
The Act requires that the first payment of tax shall always accompany the filing of the declaration first filed by the taxpayer.
If the taxpayer first meets the requirement for filing a declaration after September 15th (or in the case of a fiscal year taxpayer, after the 15th day of the 9th month of the fiscal year), the taxpayer may file an income tax return on or before the 15th day of the 1st month of the succeeding taxable year (in lieu of making a declaration) and the return shall be considered a declaration. In such cases, the entire tax shall be paid with the return.
If the taxpayer fails to file a declaration at the time required (including any extension of time), he or she shall pay, when the declaration is filed, all installments of estimated tax which he or she would have paid had he or she filed the declaration at the required time. Any remaining installments of tax shall be paid in the amounts and at the times they would be payable if the declaration had been filed at the required time.
In the case of an amended declaration filed pursuant to § 145.4, there shall be paid concurrently with the filing of the amended declaration an amount which, when added to amounts paid on declarations previously filed for the same taxable year, will aggregate the amount which would have been paid had the amended declaration been filed as the original declaration. Any remaining installments of tax to be paid after the filing of the amended declaration shall be based upon the amended declaration.
No refund of estimated tax previously paid shall be made except upon the filing of a final income tax return on Form D-40 after the close of the taxable year.
No extension of time shall be granted for filing a declaration of estimated tax and for paying any amount shown on the declaration to be due unless on or before the date that the declaration is required to be filed or payment of tax is required to be made an application for an extension is filed with the District.
Each application for extension of time to file shall state the reason why an extension of time is desired by the taxpayer.
Except for taxpayers who are abroad, no extension for filing declarations may be granted for a period longer than six (6) months.
The following table sets forth the time for filing of declarations and for making payment of estimated tax for taxpayers filing returns on a calendar year basis:
CALENDAR YEAR TAXPAYERS
If requirement is first met. | Declaration shall be filed on or before | Portion of tax payable | Due date of each payment | |
AFTER | BUT BEFORE | |||
Beginning of a year | April 2 | April 15 | 1/4 | Date declaration is filed. |
1/4 | June 15 | |||
1/4 | September 15 | |||
1/4 | January 15 of succeeding taxable year | |||
April 1 | June 2 | June 15 | 1/3 | Date declaration is filed. |
1/3 | September 15 | |||
1/3 | January 15 of succeeding taxable year. | |||
July 1 | Sept. 2 | Sept. 15 | 1/2 | Date declaration is filed. |
1/2 | January 15 of succeeding taxable year. | |||
October 1 | Jan. 1 of Succeeding taxable year | Jan. 15 of succeeding taxable year | All | Date declaration is filed. |
The following table sets forth the time for filing declarations and payment of estimated tax or fiscal year basis taxpayers:
FISCAL YEAR TAXPAYERS
If requirement is first met. | Declaration shall be filed on or before | Portion of tax payable | Due date of each payment | |
AFTER | BUT BEFORE | |||
Beginning of a fiscal year | 2nd day of 4th month of the fiscal year | 5th day of the 4th month of the fiscal year | 1/4 | Date declaration is filed. |
1/4 | 15th day of 6th month of FY | |||
1/4 | 15th day of 9th month of FY | |||
1/4 | 15th day of the first month of the succeeding taxable year. | |||
1st day of 4th month of the fiscal year | 2nd day of 6th month of the the fiscal year | 15th day of the 6th month of the fiscal year | 1/3 | Date declaration is filed. |
15th day of 9th month of FY | ||||
15th day of the first month of the succeeding taxable year. | ||||
1st day of 7th month of the fiscal year | 2nd day of 9th month of the fiscal year | 15th day of the 9th month of the fiscal year | 1/2 | Date declaration is filed. |
1/2 | 15th day of the first month of the succeeding taxable year. | |||
1st day of 10th month of the fiscal year | 1st month of the succeeding fiscal year | 15th day of the 1st month of the succeeding fiscal year | All | Date declaration is filed. |
In accordance with § 1(d) of Title XIII of the Act (Underpayment of Estimated Tax by Individuals), there is added to the tax fifteen percent (15%) per annum of the amount by which the tax exceeds estimated tax payments for the period of underpayment.
The period of underpayment referred to in § 147.11 shall run from the date the installment was required to be paid to whichever of the following dates is earlier:
D.C. Mun. Regs. tit. 9, r. 9-147