Here are some of the key 2017 tax due dates affecting businesses and other employers during the fourth quarter. Keep in mind that this list isn’t all-inclusive, so there may be additional deadlines that apply to you. Contact our accounting and bookkeeping services team to ensure you’re meeting all applicable deadlines and to learn more about the filing requirements.

2017 Tax Due Dates for Q4:

October 16

If a calendar-year C corporation that filed an automatic six-month extension:

File a 2016 income tax return (Form 1120) and pay any tax, interest and penalties due.

Make contributions for 2016 to certain employer-sponsored retirement plans.

October 31

Report income tax withholding and FICA taxes for third quarter 2017 (Form 941) and pay any tax due. (See exception below.)

November 13

Report income tax withholding and FICA taxes for third quarter 2017 (Form 941), if you deposited on time and in full all of the associated taxes due.

December 15

If a calendar-year C corporation, pay the fourth installment of 2017 estimated income taxes.

Resources for 2018 Taxes

• Q1 2018 Tax Deadlines.
• Q2 2018 Tax Due Dates.
• Q4 2018 Tax Due Dates.