Essential December 2025 Tax Deadlines for Businesses

As the year draws to a close, December marks pivotal tax deadlines for businesses. This includes critical corporate estimated tax payments and the need for prompt monthly payroll tax deposits. It’s also a crucial time to ensure that year-end actions are finalized before many institutions close on December 31.

December 15 - Corporate Estimated Tax Payment

Corporations on a calendar year must remit their fourth estimated tax payment for 2025 by December 15. Ensuring timely payment is crucial to avoid penalties and interest.
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December 15 - Payroll and Withholding Tax Deposits

Employers adhering to monthly deposit regulations are required to deposit Social Security, Medicare, and withheld income taxes for November 2025 by December 15. This deadline also applies to nonpayroll withholding deposits under the same monthly deposit rule.
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December 31 - Year-End Finalization

The last day of December is a red-letter date for concluding any pending financial actions. However, it is wise to plan and execute important tasks ahead of December 31 as various financial institutions might be closed.
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Adjustments for Weekends & Holidays

Should a due date coincide with a weekend or a legal holiday, it automatically carries over to the following business day that isn’t a legal holiday.

Special Extensions for Disaster Areas

In cases where a region is declared a disaster area, tax due dates are extended. Stay informed through these resources: FEMA and IRS.

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We’ve helped countless individuals and businesses get back on track with the IRS. Reach out today for a confidential consultation and start moving toward financial relief.
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