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2019 Q4 tax calendar

Here are some of the key tax-related deadlines for 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.


  • Provide Kelly CPA the information needed to complete your extended individual or calendar year corporate tax return.

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.
  • Last extended deadline to file your personal 2018 federal income tax return (Form 1040) and pay any tax, interest and penalties due.

October 31

  • Report income tax withholding and FICA taxes for third quarter 2019 (Form 941) and pay any tax due.

December 16

  • If a calendar-year C corporation, pay the fourth installment of 2019 estimated income taxes.
  • Contact us if you need assistance with a year-end tax estimate.