Insight

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

Related Insights

No tax on car loan interest under the new law? Not exactly | tax accountant in elkton md | Weyrich, Cronin & Sorra

Tax Prep, Planning & Strategy

No tax on car loan interest under the new law? Not exactly

Under current federal income tax rules, so-called personal interest expense generally can’t be deducted. One big exception is qualified residence…
The QBI deduction and what’s new in the One, Big, Beautiful Bill Act | cpa in baltimore city | Weyrich, Cronin & Sorra

Management Advisory Services & Business Consulting

The QBI deduction and what’s new in the One, Big, Beautiful Bill Act

The qualified business income (QBI) deduction, which became effective in 2018, is a significant tax benefit for many business owners. It allows…
How will the changes to the SALT deduction affect your tax planning? | tax preparation bel air | Weyrich, Cronin & Sorra

Tax Prep, Planning & Strategy

How will the changes to the SALT deduction affect your tax planning?

The One Big Beautiful Bill Act (OBBBA) shifts the landscape for federal income tax deductions for state and local taxes (SALT), albeit temporarily.…

Connect with us

Use the form below to send us an email. WCS responds directly to all inquiries and general questions within 24 hours of posting.

This contact form is deactivated because you refused to accept Google reCaptcha service which is necessary to validate any messages sent by the form.