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Essential January 2026 Tax Deadlines for Businesses

As the calendar turns to January 2026, businesses, employers, farmers, and fishermen face critical tax deadlines. Thoughtful preparation now ensures regulatory compliance and helps you steer clear of penalties.

January 15 - Employer’s Monthly Deposit Obligation -

Employers adhering to monthly deposit rules must submit Social Security, Medicare, and withheld income taxes for December 2025 by January 15. Additionally, if monthly nonpayroll withholding applies, deposits must be made electronic, except when the total liability is under $2,500 for a return period—permitting quarterly or annual remittances with the tax return.

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January 15 - Farmers and Fishermen Deadline -

Alongside other businesses, farmers and fishermen have until January 15 to pay estimated taxes for 2025 using Form 1040-ES. Though the deadline for filing the 2025 return (Form 1040 or Form 1040-SR) stretches to April 15, failing to pay estimated taxes by January 15 entails filing the 2025 return and settling any obligations by March 2, 2026, to sidestep penalties.

Weekends & Holidays Considerations:

Due dates landing on weekends or legal holidays automatically extend to the next business day that is neither a weekend nor a holiday.

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Disaster Area Extensions:

In designated disaster areas, tax deadlines are extended. For a comprehensive understanding of disaster area designations and related deadline extensions, visit the following resources:

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

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