Key deadlines for businesses and other employers in the Third Quarter
June 25, 2018
There are three main tax-related deadlines affecting businesses and other employers during the third quarter of 2018: July 31st, August 10th, and September 17th.
 
July 31st
  • Report any income tax withholding and FICA taxes for second quarter 2018 (Form 941), and pay any tax that is due. (See the exception below, under “August 10th.”)
  • File a 2017 calendar-year retirement plan report (Form 5500 or Form 5500-EZ) or ask for an extension.
August 10th
  • If you deposited on time and fully paid all associated taxes, report income tax withholding and FICA taxes for second quarter 2018 (Form 941).
September 17th
  • If you are a calendar-year C corporation, pay the third portion of your 2018 estimated income taxes.
  • If you are a calendar-year S corporation or partnership that filed an automatic six-month extension:
    • File a 2017 income tax return (Form 1120S, Form 1065 or Form 1065-B) and pay any tax, interest and penalties due.
    • Make contributions for 2017 to certain employer-sponsored retirement plans.
These dates are not all-encompassing, so there may be additional deadlines that apply to you and your business. Contact your Faw Casson advisor in order to learn more about filing requirements and meeting all appropriate deadlines.

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