Essential December 2025 Tax Deadlines for Businesses

As December arrives, businesses must gear up for pivotal tax deadlines, including key corporate estimated tax payments and timely monthly payroll tax deposits. Remember to address all year-end actions well before the closures on December 31 to avoid any last-minute stress.

December 15 - Corporate Estimated Taxes

The final quarter's estimated tax installment is due for corporations operating on a calendar year for 2025. Ensure your payments are processed promptly to maintain compliance.

December 15 - Payroll and Withholding Taxes

Employers subjected to monthly deposit rules should mark December 15 as the deadline for remitting Social Security, Medicare, and withheld income taxes for November 2025. Additionally, this date serves for nonpayroll withholding deposits if the monthly rule applies.Image 3

December 31 - Final Day Alert

Be proactive and execute any financial moves early, as executing on December 31 could be risky due to potential financial institution closures.

Image 2Weekends & Holidays Adjustments:

If a deadline lands on a weekend or legal holiday, the due date shifts to the next business day. This buffer is crucial to ensure all filings and payments are completed accurately without additional penalties or interest fees.

Extensions for Disaster Areas:

Businesses in officially declared disaster areas receive deadline extensions. Always check the FEMA and IRS websites for the latest updates on disaster declarations and any resulting filing relief.Image 1

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