Below is a general schedule of tax deadlines throughout the year. If any due date falls on a Saturday, Sunday or legal holiday, the deadline is moved to the next business day. Deadlines for entities with a year-end other than December 31 are listed at the bottom of the page.

Form 1040 – Individual Tax Return
     Due date April 15
     Final extension October 15

Form 1040-ES – Individual Estimated Tax Payments
     First Installment April 15
     Second Installment June 15
     Third installment September 15
     Fourth Installment January 15 (following year)

Form 1065 – Partnership Income Tax Return
     Due date April 15
     Final extension September15

Form 1041 – Fiduciary (Trust) Income Tax Return
     Due date April 15
     Final extension September15

Form 1120 – Corporation Income Tax Return
     Due date March 15
     Initial extension September15

Form 1120S – Sub-S Corporation Income Tax Return
     Due date March 15
     Initial extension September15

Form 709 – Gift Tax Return
     Due date March 15
     Initial extension Same as 1040

Form 706 – Estate Income Tax Return
     Due date Nine months from the date of death
     Extension Additional six months

Form 5500 – Employee Benefit Plan Income Tax Return
     Due date July 31
     Extension August 15

Form 990/990-PF – Charitable/Private Foundation Income Tax Return
     Due date May 15
     Extension August 15

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Rules of thumb for entities with a year-end other than December 31

Form 1120 – Corporation Income Tax Return
     Due 2.5 Months after Year End

Form 1120S – S Corporation Income Tax Return
     Due 2.5 Months after Year End

Form 1065 – Partnership Income Tax Return
     Due 3.5 Months after Year End

Form 1041 – Fiduciary (Trust) Income Tax Return
     Due 3.5 Months after Year End

Form 990/990-PF – Charitable/Private Foundation Income Tax Return
     Due 4.5 Months after Year End