December 2025 Key Tax Deadlines for Businesses

As December 2025 approaches, businesses face crucial tax obligations, including corporate estimated tax payments and monthly payroll tax deposits. Ensure all year-end tasks are completed ahead of the December 31 closures to avoid any last-minute issues.Image 2

December 15 - Corporate Estimated Taxes

Corporations must submit the fourth installment of their estimated tax for the 2025 calendar year. Timely payment is crucial to avoid penalties.

December 15 - Payroll Tax Deposits

Employers, adhere to the monthly deposit rules. December 15 is the deadline for Social Security, Medicare, and withheld income taxes for November 2025, and any nonpayroll withholding as per monthly rules.Image 3

December 31 - Year-End Finalization

Plan ahead: If actions can't be finalized on December 31 or if they require more than a day, start earlier to account for potential business closures.

Considerations for Weekends & Holidays

If a deadline falls on a weekend or legal holiday, it's automatically extended to the next business day. Strategic planning ensures compliance with these extensions.

Extension Due to Disaster Areas

Designated disaster areas receive filing extensions. For the latest updates, visit FEMA and IRS websites.

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