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2026 Federal Tax Deadlines: A Year-Round Guide to Staying on Track

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The new year is here, and with it comes a fresh set of federal tax deadlines. Keeping these key dates in mind can help you avoid penalties, reduce stress, and stay compliant all year long. Below is a month-by-month reference guide to the most important federal tax deadlines for 2026.

January

January 15

  • Deadline to pay 4th quarter estimated taxes for the prior tax year.
  • This is an important date for freelancers, business owners, and others who make quarterly estimated payments.

February

February 2

  • Deadline to send W-2s and 1099s to employees and independent contractors.
  • Deadline to file W-2s/W-3s and 1099-NECs with the IRS.
  • Employers and businesses should plan ahead to ensure all wage and contractor reporting is completed on time.

March

March 2

  • Deadline to file paper 1099s and Form 1096 (excluding 1099-NECs).

March 16

  • Deadline to file S-Corporation (Form 1120-S) and Partnership (Form 1065) tax returns.
  • Deadline to elect S-Corporation status for existing corporations or LLCs.

March 31

  • Deadline to electronically file 1099s and Form 1096 (excluding 1099-NECs).

April

April 15

  • Deadline to file:
    • Individual tax returns (Form 1040)
    • C-Corporation returns (Form 1120)
  • Last day to make HSA contributions and contributions to most retirement plans for the prior tax year.
  • Deadline to pay 1st quarter estimated tax payments.
  • This is the busiest tax deadline of the year and a critical one to plan for well in advance.

May

May 15

  • Deadline to file most nonprofit tax returns (Form 990).

June

June 15

  • Deadline to pay 2nd quarter estimated tax payments.

September

September 15

  • Deadline to file extended S-Corporation and Partnership returns.
  • Deadline to pay 3rd quarter estimated tax payments.

September 30

  • Deadline to file extended trust returns.

October

October 15

  • Deadline to file extended individual tax returns.
  • Deadline to file extended C-Corporation returns.

November

November 16

  • Deadline to file extended nonprofit returns.

Plan Ahead for a Smoother Tax Year

Tax deadlines can sneak up quickly, especially for those juggling multiple filing requirements. Mark these dates on your calendar, keep your records organized, and consider working with a tax professional to ensure everything is filed accurately and on time.

Staying proactive throughout 2026 can save you time, money, and unnecessary stress—so a little planning now can go a long way later.

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