Key Tax Deadlines for Businesses in January 2026

As January 2026 approaches, it's essential for businesses, employers, farmers, and fishermen to prepare for important tax deadlines. Planning ahead ensures compliance and helps avoid costly penalties.

January 15 - Employer’s Monthly Tax Deposit

For employers subject to monthly deposit rules, January 15 marks the deadline for submitting December 2025’s Social Security, Medicare, and withheld income taxes electronically. Remember, paper coupons are not accepted, and only those with a deposit liability under $2,500 for the reporting period may opt to remit quarterly or annually.

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January 15 - Estimated Tax Deadline for Farmers and Fishermen

Farmers and fishermen must pay their estimated tax for 2025 using Form 1040-ES by this date. However, if you miss this deadline, filing your 2025 return by March 2, 2026, allows you to escape estimated tax penalties, provided that any tax due is paid.

Weekends & Holidays Implications

Is your deadline falling on a weekend or holiday? Rest easy, as it gets automatically extended to the next regular business day.

Extensions for Disaster Areas

Tax deadlines may be extended for those in designated disaster areas. Check FEMA’s disaster declarations page or the IRS's tax relief announcements for the most current information on extensions.

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