2018 Q2 tax calendar: Key deadlines for businesses and other employers

March 27, 2018

Here are some of the key tax-related deadlines affecting businesses and other employers during the second 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.

  • April 2 Electronically file 2017 Form 1096, Form 1098, Form 1099 (except if an earlier deadline applies) and Form W-2G.
  • April 17 If a calendar-year C corporation, file a 2017 income tax return (Form 1120) or file for an automatic six-month extension (Form 7004), and pay any tax due. If the return isn’t extended, this is also the last day to make 2017 contributions to pension and profit-sharing plans. If a calendar-year C corporation, pay the first installment of 2018 estimated income taxes.
  • April 30 Report income tax withholding and FICA taxes for first quarter 2018 (Form 941), and pay any tax due. (See exception below under “May 10.”)
  • May 10 Report income tax withholding and FICA taxes for first quarter 2018 (Form 941), if you deposited on time and in full all of the associated taxes due.
  • June 15 If a calendar-year C corporation, pay the second installment of 2018 estimated income taxes.

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