IRS Filing Deadlines

 Here are the key quarterly IRS deadlines most U.S. businesses need to know. If any deadline falls on a weekend or federal holiday, it moves to the next business day.

  1. Quarterly payroll tax returns (Form 941)
    • Q1 (Jan 1–Mar 31) – file by April 30
    • Q2 (Apr 1–Jun 30) – file by July 31
    • Q3 (Jul 1–Sep 30) – file by October 31
    • Q4 (Oct 1–Dec 31) – file by January 31 (of the following year)
  2. Quarterly estimated income tax payments
    A. Individuals, sole proprietors, partners, S-corp shareholders (Form 1040-ES) and estates/trusts (Form 1041-ES)
    • Q1 payment – April 15
    • Q2 payment – June 15 (or next business day)
    • Q3 payment – September 15
    • Q4 payment – January 15 (of the following year)

    B. C corporations (Form 1120-W)
    • Q1 payment – April 15
    • Q2 payment – June 15
    • Q3 payment – September 15
    • Q4 payment – December 15

Make sure you also deposit withheld payroll taxes according to your deposit schedule (semi-weekly or monthly) and file any state/local returns as required. If you’re ever in doubt, consult your tax advisor or the IRS website for the latest guidance.

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