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Key January 2026 Tax Deadlines for Businesses

January 2026 is a pivotal month for tax obligations that affects businesses, employers, farmers, and fishermen. Proactive planning is essential to ensure compliance and avoid penalties, helping your business remain on a solid financial path.

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January 15 - Employer’s Monthly Deposit Obligation -

For employers adhering to monthly deposit regulations, January 15 is the deadline to deposit Social Security, Medicare, and withheld income tax for December 2025. This date also holds for nonpayroll withholding for December if monthly deposit rules apply. Remember, employment tax deposits must be made electronically, unless your deposit liability is under $2,500 per return period, in which case quarterly or annual payments with the return are permissible.

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January 15 – Farmers and Fishermen Settlement -

Use Form 1040-ES to settle your estimated tax for 2025. Although the filing of your 2025 income tax return (Form 1040 or Form 1040-SR) is due by April 15, if you missed the January 15 estimated payment, you must file your 2025 return and make any due payment by March 2, 2026, to sidestep an estimated tax penalty.

Adjustments for Weekends & Holidays:

Should a due date land on a weekend or legal holiday, the deadline is adjusted to the next business day, provided it is not a legal holiday itself.

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Extensions in Disaster Situations:

In instances where an area has been declared a disaster zone, filing deadlines are extended. For comprehensive and current information, verify if your area qualifies for disaster-related extensions by consulting these resources:

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

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Gilbert, Arizona 85233
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