District of Columbia Tax Deadlines
State income tax filing deadlines, extensions, and estimates for 2026.
DC Office of Tax and Revenue
https://otr.cfo.dc.gov
individual deadline
Due: Apr 15, 2026
Extension: Oct 15, 2026
Form: Form D-40 / D-40B
DC extension uses Form FR-127; payment due by April 15.
Estimated Payments
Sole Proprietorship deadline
Due: Apr 15, 2026
Extension: Oct 15, 2026
Form: Form D-40 / D-40B
Business income reported on DC personal return.
Estimated Payments
Partnership deadline
Due: Mar 16, 2026
Extension: Sep 15, 2026
Form: State business income tax return
Calendar-year due date follows federal timing for pass-through entities.
S Corporation deadline
Due: Mar 16, 2026
Extension: Sep 15, 2026
Form: State business income tax return
Calendar-year due date follows federal timing for pass-through entities.
C Corporation deadline
Due: Apr 15, 2026
Extension: Oct 15, 2026
Form: State corporate income tax return
Calendar-year due date follows federal timing for corporations.
Estimated Payments
LLC deadline
Due: Mar 16, 2026
Extension: Sep 15, 2026
Form: State business income tax return
Calendar-year due date follows federal timing for pass-through entities.
Nonprofit deadline
Due: May 15, 2026
Extension: Nov 15, 2026
Form: State nonprofit return
Nonprofit annual return generally due the 15th day of the 5th month.
Estimated Tax Payments
View all quarterly estimated payment due dates for District of Columbia.
FAQ
Does District of Columbia conform to federal due dates?
Many District of Columbia deadlines follow the federal calendar. Always confirm on DC Office of Tax and Revenue.
Where can I file District of Columbia tax forms?
Visit DC Office of Tax and Revenue at https://otr.cfo.dc.gov for official forms and e-file options.