Tax deadlines in 2021

2021 filing update: The tax deadline has been changed to May 17, 2021, for individual 2020 returns. The tax deadline change includes Schedule C and Schedule F filers. For C Corporation filers (Form 1120), the deadline remains April 15.

Even with the extended date, the IRS encourages filers to consider filing as soon as possible to receive refunds and additional stimulus funds they may be entitled to.

Block Advisors tax pros are here and ready to file your return today!

While Tax Day is the only date some people may have on their calendar when it comes to tax deadlines, there are actually many important tax dates throughout the year. These due dates impact both businesses and individuals. The dates you’ll need depend on your unique situation.

What is a tax calendar?

A tax calendar is a 12-month calendar divided into quarters. This calendar gives specific due dates for:

  • Filing tax forms
  • Paying taxes
  • Other actions taxpayers may have to take as required by federal tax law

This tax calendar is suitable for individual tax filers, small businesses, and employers. It contains information about how to use the calendar and general tax deadlines throughout 2021. Here are some of the important deadlines.

First quarter

January, February, & March tax deadlines


January 15: Estimated quarterly tax payments for Q4 of 2020 are due.


February 1: Form W-2 and 1099-MISC for non-employee compensation (box 7) must be filed with the IRS and furnished to individuals by this deadline. As an individual taxpayer, you will receive a copy of these forms around that date.

February 16: Individuals who claimed exemption from income tax withholding last year on Form W-4, Employee’s Withholding Allowance Certificate, must file a new Form W-4 with their employer by this date to continue their exemption for another year.


March 2: Farmers and fishermen who did not pay all estimated tax payments must file an income tax return and pay any tax due by March 2. If all estimated taxes were paid, the due date for filing your return is April 15.

March 15: S corporation and partnership calendar year tax returns are due. This is the deadline to file an S corporation and partnership tax extension (using Form 7004), as well.

Second quarter

April, May, & June tax deadlines


The tax extension change to May 17, 2021, applies to each of the April 15 deadlines noted with an asterisk below.

April 15:*TAX DAY! Your individual 2020 income tax return and state returns are due. If you want an automatic six-month extension of time to file the return, file an extension and pay what you estimate you owe in tax to avoid penalties and interest.

April 15: If you’re a corporation, April 15 is the due date for your corporate tax return.

April 15: If you pay quarterly taxes, the first quarter’s payment for 2021 is due this day.

April 15:* Today is the last day to make a contribution to retirement or other tax-advantaged savings accounts, like a traditional IRA, Roth IRA, Health Savings Account, SEP-IRA, and solo 401(k).

April 15: Calendar year estate and trust returns (Form 1041) are due.

April 15:* Report of Foreign Bank and Financial Accounts (FBAR) is due.


June 15: The second payment of quarterly estimated tax payments for 2021 is due.

Third quarter

July, August, & September tax deadlines


September 15: The third estimated quarterly tax payment for 2021 is due on this date.

September 15: Extended deadline for calendar-year partnerships and S corporations.

September 30: Extended deadline for estate and trust income tax returns is today.

Fourth Quarter

October, November, & December Tax Deadlines


October 15: If you have an automatic six-month tax extension to file your income tax return for 2020, file Form 1040 and pay any tax, interest, and penalties on this date.

October 15: This the due date for corporations with a tax extension.


December 1: Consider making end-of-year tax moves to optimize your tax outcome.

Get help getting ready for tax deadlines 

That’s a lot of deadlines… We know it’s hard to stay on top of taxes alone, so that’s why we’re here to help.

Rely on our team of small business certified tax pros to get your taxes right and keep your business on track.

Make an appointment.

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