Please note: We DO NOT offer free tax advice for TurboTax users or self-preparers.

Essential December 2025 Tax Deadlines for Businesses

December is a crucial month for businesses to manage key tax obligations. Meeting deadlines for corporate estimated taxes and monthly payroll deposits is imperative. Additionally, proactive year-end action is advisable to accommodate potential closures on December 31.

December 15 - Corporate Estimated Tax Obligations

The deadline for the fourth quarter estimated tax payment for calendar year corporations in 2025 is December 15. Ensure accuracy to avoid penalties and align this payment with your broader tax strategy for fiscal efficacy.

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December 15 - Employer Payroll Tax Deposits

Employers must meet the December 15 deadline for November 2025 Social Security, Medicare, and withheld income tax deposits. Monthly deposit rules apply. Similarly, nonpayroll withholding deposits should also be completed by this date if applicable.

December 31 - Strategic Financial Decisions

To avoid the constraints of December 31st financial institution closures, plan and execute year-end strategic actions early. This ensures compliance and optimizes tax benefits. Remember, the impact on your strategic tax planning can be substantial, especially considering tax changes and financial opportunities.

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Considerations for Holidays & Weekends

When deadlines fall on weekends or legal holidays, they automatically extend to the next business day. Planning in advance helps in managing workload and avoiding last-minute rushes.

Extensions Due to Federally Declared Disasters

In areas designated as disaster zones, deadline extensions may apply. Check resources like FEMA and IRS disaster relief notices for detailed extension updates.

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