Here are some of the key tax deadlines affecting businesses and other employers during the fourth quarter of 2019.

Keep in mind that this list isn’t all-inclusive, so there may be additional deadlines that apply to you.

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.

Contact your trusted advisor to ensure you’re meeting all applicable tax deadlines and to learn more about the filing requirements.