2018 Q4 tax calendar: Key deadlines for businesses and other employers
Here are some of the key tax-related deadlines affecting businesses and other employers during the fourth quarter of 2018. 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 2017 income tax return (Form 1120) and pay any tax, interest and penalties due.
- Make contributions for 2017 to certain employer-sponsored retirement plans.
October 31
- Report income tax withholding and FICA taxes for third quarter 2018 (Form 941) and pay any tax due. (See exception below under “November 13.”)
November 13
- Report income tax withholding and FICA taxes for third quarter 2018 (Form 941), if you deposited on time and in full all of the associated taxes due.
December 17
- If a calendar-year C corporation, pay the fourth installment of 2018 estimated income taxes.
© 2018
Large enough to serve a diverse clientele, yet small enough to maintain a hands-on approach, we are committed to maintaining the highest accounting and ethical standards with continuous education, extensive research resources, and excellent quality control.
Polk and Associates is a member of the Michigan Association of Certified Public Accountants, and the American Institute of Certified Public Accountants. The firm participates in the AICPA Peer Review Program, and has always received the highest level of award for its audit practice and quality control.
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