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2021 Q4 tax calendar: Key deadlines for businesses and other employers

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Posted by Admin Posted on Oct 05 2021



Here are some of the key tax-related deadlines affecting businesses and other employers during the fourth quarter of 2021. 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.

Note: Certain tax-filing and tax-payment deadlines may be postponed for taxpayers who reside in or have a business in federally declared disaster areas. 

Friday, October 15

  • If a calendar-year C corporation that filed an automatic six-month extension:
    • File a 2020 income tax return (Form 1120) and pay any tax, interest and penalties due.
    • Make contributions for 2020 to certain employer-sponsored retirement plans.

Monday, November 1

  • Report income tax withholding and FICA taxes for third quarter 2021 (Form 941) and pay any tax due. (See exception below under “November 10.”)

Wednesday, November 10

  • Report income tax withholding and FICA taxes for third quarter 2021 (Form 941), if you deposited on time (and in full) all of the associated taxes due.

Wednesday, December 15

  • If a calendar-year C corporation, pay the fourth installment of 2021 estimated income taxes.

Friday, December 31

  • Establish a retirement plan for 2021 (generally other than a SIMPLE, a Safe-Harbor 401(k) or a SEP).

Contact us if you’d like more information about the filing requirements and to ensure you’re meeting all applicable deadlines.

© 2021

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This blog site is intended for educational purposes directed towards our clients and provides general information about tax, accounting and business related topics.  It is not intended to provide professional advice.  We are not investment advisors. Accordingly, we suggest that you seek the advice of qualified investment advisors appropriate to each investment being considered. By using this blog site, you understand that there is no CPA/client relationship between you and Hyde & Company CPAs, P.C. or its employees.  The blog and website, including all contents posted by the author(s), should not be used as a substitute for competent counsel from a qualified advisor in your state.  Hyde & Company CPAs, P.C. posts are based on current or proposed tax rules at the time they are written and older posts are not updated for tax rule changes.  Tax rules are frequently changed, added, amended, and/or left to expire – always check with your CPA or accountant regarding the most current tax rules and how they apply to your specific tax issue