2020 Q4 tax calendar: Key deadlines for businesses and other employers

Date posted: October 1, 2020

Here are some of the key tax-related deadlines affecting businesses and other employers during the fourth quarter of 2020. Keep in mind that this list isn’t all-inclusive, so there may be additional deadlines that apply to you. Contact us to ensure you’re meeting all applicable deadlines and to learn more about the filing requirements.

Thursday, October 15

  • If a calendar-year C corporation that filed an automatic six-month extension:
    • File a 2019 income tax return (Form 1120) and pay any tax, interest and penalties due.
    • Make contributions for 2019 to certain employer-sponsored retirement plans.

Monday, November 2

  • Report income tax withholding and FICA taxes for third quarter 2020 (Form 941) and pay any tax due. (See exception below under “November 10.”)

Tuesday, November 10

  • Report income tax withholding and FICA taxes for third quarter 2020 (Form 941), if you deposited on time (and in full) all of the associated taxes due.

Tuesday, December 15

  • If a calendar-year C corporation, pay the fourth installment of 2020 estimated income taxes.

Thursday, December 31

  • Establish a retirement plan for 2020 (generally other than a SIMPLE, a Safe-Harbor 401(k) or a SEP).

© 2020


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This news item was recommended by: John Dyer

John L. Dyer, CPA is a partner of Peter Shannon & Co., a CPA firm located in the Chicagoland area. His credentials include Bachelor of Science in Accountancy at the University of Illinois Champaign and a Master’s Degree of Science in Taxation at DePaul University. His expertise includes taxation for high income individuals, estate, retirement and education planning, business fields of construction, broker/dealers, manufacturing, medical, trucking, and retail.

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