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Key December 2025 Tax Deadlines for Businesses

December is a critical month for businesses, marking some significant tax deadlines. This includes the final estimated tax payments for corporations and monthly obligations for payroll-related taxes. It's also crucial to finalize year-end strategies by December 31, considering potential early closures.

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December 15 - Corporate Estimated Taxes

The fourth and final estimated tax payment for calendar year 2025 corporations is due on this date. Ensure your calculations are accurate to avoid penalties.

December 15 - Employer Tax Obligations

Employers need to deposit Social Security, Medicare, and withheld income tax by December 15 if monthly deposit rules apply. This due date also covers nonpayroll withholdings for November.

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December 31 - Year-End Planning

Don't wait until the last minute. December 31 is the final day for financial moves you wish to complete in 2025, though many institutions might close early, so plan accordingly.

Considerations for Weekends & Holidays

If your due date lands on a weekend or holiday, it extends to the next working day. Keep this in mind for efficient tax scheduling.

Extensions for Disaster Areas

If your area is declared a disaster zone, filing deadlines may be extended. For updates, visit FEMA and IRS websites.

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