Crucial Tax Deadlines in December 2025 for Businesses

As December unfolds, business owners face pivotal tax deadlines that demand attention, including corporate estimated tax payments and essential payroll tax deposits. Additionally, it's crucial to anticipate year-end financial actions with a view toward the December 31 cut-off, as many institutions may close early or entirely.Image 2

December 15 - Corporations

On December 15, corporations must submit the fourth installment of their estimated tax for the calendar year 2025. This deadline is critical to maintaining compliance and avoiding interest and penalties.Image 3

December 15 - Payroll Taxes

Employers subject to monthly deposit rules must also remit their Social Security, Medicare, and withheld income taxes by December 15 for November 2025. If monthly deposit rules apply to nonpayroll withholdings, those deposits are due as well.

Plan Ahead for December 31

Ensure that any year-end actions, especially those requiring coordination with financial institutions, are initiated before December 31. Many institutions may not operate on the final day of the year, so proactive planning is advised.Image 1

Weekends & Holidays

If any of these deadlines fall on a weekend or legal holiday, the due date extends to the next business day. This ensures businesses have sufficient time to meet obligations.

Disaster Area Extensions

For areas declared disaster zones, the IRS may extend deadlines. Verify your eligibility for such extensions by visiting the FEMA and IRS websites for the latest updates.

Staying informed of these key dates helps ensure compliance and financial stability as the year closes.

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