Tax Calendar: Key Deadlines for Businesses and Other Employers in Q3 2021

Here are some of the key tax-related deadlines impacting businesses and other employers during the third quarter of 2021. Keep in mind that this list isn’t all-inclusive, so there may be additional deadlines that apply to you.

August 2

  • tax deadlineEmployers report income tax withholding and FICA taxes for second quarter 2021 (Form 941) and pay any tax due.
  • Employers file a 2020 calendar-year retirement plan report (Form 5500 or Form 5500-EZ) or request an extension.

August 10

  • Employers report income tax withholding and FICA taxes for second quarter 2021 (Form 941), if you deposited all associated taxes that were due in full and on time.

September 15

  • Individuals pay the third installment of 2021 estimated taxes, if not paying income tax through withholding (Form 1040-ES).
  • If a calendar-year corporation, pay the third installment of 2021 estimated income taxes.
  • If a calendar-year S corporation or partnership that filed an automatic extension:
    • File a 2020 income tax return (Form 1120S, Form 1065 or Form 1065-B) and pay any tax, interest and penalties due.
    • Make contributions for 2020 to certain employer-sponsored retirement plans.

Questions

Contact us to ensure you’re meeting all applicable deadlines and to learn more about the filing requirements for your specific situation.

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