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Essential January 2026 Tax Deadlines for Businesses

As January 2026 approaches, businesses, employers, farmers, and fishermen need to gear up for essential tax obligations. Planning ahead can prevent compliance hiccups and keep penalties at bay.

January 15 - Employer’s Monthly Deposit Deadline

If you’re an employer and subject to monthly deposit rules, January 15 marks your deadline to submit Social Security, Medicare, and withheld income tax for December 2025. Additionally, this date is crucial for nonpayroll withholding deposits for December if monthly rules apply. Remember, employment tax deposits must be made electronically, though exceptions apply for employers with a liability under $2,500 per return period who may opt for quarterly or annual payments with the return.

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January 15 - Farmers and Fishermen

Use Form 1040-ES to pay your estimated tax for 2025 by January 15. Although you have until April 15 to file your 2025 income tax return (Form 1040 or 1040-SR), failing to pay your estimated tax by January 15 necessitates completing your 2025 return and remitting any owed tax by March 2, 2026, to sidestep penalties.

Understanding Weekends & Holidays

Should a due date coincide with Saturday, Sunday, or a legal holiday, the deadline extends to the next business day that isn't also a holiday.

Extensions in Disaster Areas

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Regions confirmed as disaster areas receive automatic deadline extensions. For confirmation of designation and specific extension details, check these resources: FEMA Disaster Declarations and IRS Disaster Tax Relief.

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