2019 Q4 Tax Calendar: Key Deadlines for Businesses and Other Employers

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Here are some of the key tax-related deadlines affecting businesses and other employers during the fourth quarter of 2019 (to download a printable calendar, click here). 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.

October 15

  • If a calendar-year C corporation that filed an automatic six-month extension:
    • File a 2018 income tax return (Form 1120) and pay any tax, interest and penalties due.
    • Make contributions for 2018 to certain employer-sponsored retirement plans.

October 31

  • Report income tax withholding and FICA taxes for third quarter 2019 (Form 941) and pay any tax due. (See exception below under “November 12.”)

November 12

  • Report income tax withholding and FICA taxes for third quarter 2019 (Form 941), if you deposited on time (and in full) all of the associated taxes due.

December 16

  • If a calendar-year C corporation, pay the fourth installment of 2019 estimated income taxes.

To help ensure you don't miss any important Q4 deadlines, click here to download a printable calendar. 

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