Essential December 2025 Tax Deadlines for Businesses

As the year winds down, December presents crucial tax deadlines for businesses. Navigating these deadlines effectively ensures compliance and financial preparedness. Key dates include corporate estimated tax payments and monthly payroll tax deposits, alongside essential year-end actions that must be completed before December 31 closures.

December 15 - Corporate Tax Obligations

Mark your calendar for December 15th, when the fourth installment of estimated tax for corporations operating on a calendar year is due. Ensuring timely payments can help avoid penalties and keep your business on track.Image 1

December 15 - Employer Payroll Responsibilities

Employers adhering to monthly deposit rules must also focus on December 15 as the deadline for depositing Social Security, Medicare, and withheld income taxes for November 2025. Additionally, it marks the due date for non-payroll withholding deposits.Image 2

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December 31 - Year-End Considerations

With December 31 as the last operational day of the year, businesses should execute any necessary financial actions prior to closure. Anticipate potential holiday or weekend closures of financial institutions and plan accordingly to ensure all transactions and filings meet the year-end cutoff.Image 3

Holiday and Weekend Adjustments:

If a tax due date coincides with a weekend or holiday, it extends to the next business day, a relief that offers additional time for necessary actions.

Extensions for Disaster Areas:

Businesses located in disaster-designated areas may qualify for extended tax deadlines. Keep informed by visiting FEMA and the IRS for updates on disaster relief and extended filing dates.

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