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Essential Business Tax Deadlines for January 2026

As January 2026 approaches, businesses, employers, farmers, and fishermen need to be aware of crucial tax deadlines. Diligent preparation can help maintain regulatory compliance and avert penalties.

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January 15 - Employer’s Monthly Deposit Obligation -

Employers adhering to monthly deposit regulations must submit their December 2025 Social Security, Medicare, and withheld income tax payments by January 15. This also applies to nonpayroll withholding deposits for December if the monthly rule is applicable. Remember, employment tax deposits are strictly electronic, with an exception for employers whose deposit liability remains under $2,500 for a filing period; in such cases, payments may accompany the quarterly or annual return.

January 15 - Farmers and Fishermen Responsibility -

Utilize Form 1040-ES to submit your estimated tax for 2025 by January 15. Although the filing deadline for your 2025 income tax return (Form 1040 or 1040-SR) extends to April 15, failure to settle the estimated tax by January 15 mandates filing your 2025 return and fulfilling any tax obligations by March 2, 2026, to avoid penalty charges.

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Weekend and Holiday Extensions:

If a deadline coincides with a Saturday, Sunday, or legal holiday, the due date automatically shifts to the following business day not designated as a legal holiday.

Extensions for Disaster Areas:

Designated disaster areas receive deadline extensions. For confirmation of such designations and corresponding filing extensions, consult 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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