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Essential January 2026 Tax Deadlines for Businesses

January 2026 brings significant tax due dates for a variety of sectors, including businesses, employers, farmers, and fishermen. Planning ahead is crucial to maintain compliance and avoid penalties.

January 15 - Employer’s Monthly Deposit Due

If you are an employer subject to monthly deposit rules, ensure your deposit of Social Security, Medicare, and withheld income tax for December 2025 is completed by January 15. The same deadline applies to nonpayroll withholding deposits for December 2025 if you follow the monthly deposit rule. Electronic submission of employment tax deposits is mandatory, with exceptions for deposit liabilities below $2,500 for a given return period where quarterly or annual payments are an option.

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January 15 - Farmers and Fishermen

Pay your estimated taxes for 2025 using Form 1040-ES. While you have until April 15 to submit your 2025 income tax return (Form 1040 or Form 1040-SR), if your estimated tax payment isn't made by January 15, you’ll need to file your 2025 return and pay any resulting tax by March 2, 2026, to sidestep an estimated tax penalty.

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Weekends & Holidays

Should a due date coincide with a Saturday, Sunday, or legal holiday, it automatically extends to the ensuing business day, provided it isn't also a holiday.

Disaster Area Extensions

When an area is declared a disaster zone, due dates are extended accordingly. Keep updated on disaster area declarations and related extensions by visiting these resources:

FEMA: https://www.fema.gov/disaster/declarations
IRS: https://www.irs.gov/newsroom/tax-relief-in-disaster-situations

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