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2018 Tax Filing Due Dates and Deadline



Tax season has once again arrived.  The Internal Revenue Service (IRS) announced last week that the nation’s tax season will begin Monday, January 29, 2018 and tax deadline will be April 17 this year- giving taxpayers an additional two days to file beyond the April 15th deadline.

The table below list the dates and details when each type of entity taxes are due in 2018 for the year 2017 and its extended deadlines:


Type   Due Date Extended Due Dates 
Partnership (Form 1065)

S Corporations (Form 1120S)

 March 15, 2018  September 17, 2018
Individuals (Form 1040)

C Corporations (Form 1120)

April 17, 2018
 October 15, 2018
 Trusts and Estates (Form 1041)
April 17, 2018
 October 1, 2018
Tax Exempt Organizations (Form 990)
 May 15, 2018  November 15, 2018
 Employee Benefit Plan (Form 5500)  July 31, 2018  November 15, 2018


Additional Notes:

  • The tax return due date for individuals and corporations typically falls on the fifteenth day of the fourth month of the company’s fiscal year.
  • Tax return due date for flow-through entities such as S Corporation or LLC is the fifteenth day of the third month of the company’s fiscal year.
  • Employee Benefit Plan due dates fall on the last day of the seventh month after the plan year ends (July 31 for a calendar-year plan).
  • Exempt organizations must file taxes on the fifteenth day of the fifth month of the organization’s fiscal year. Also, exempt organizations only receive 3 months of extension instead of 6 months compared to other entity types.

If you have any questions about these due dates or on your upcoming tax return, please contact one of our CPAs of Choice tax professionals at 703-591-5200.

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