Here are some of the key tax-related 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. 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.

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