Learning Center
We keep you up to date on the latest tax changes and news in the industry.

Key Business Tax Deadlines for December 2025

As the year winds down, December heralds a crucial period for businesses to wrap up their fiscal responsibilities. This month is dominated by important tax deadlines, including payments for estimated corporate taxes and payroll tax obligations. Additionally, it’s vital to finalize any year-end activities as financial institutions may close on December 31.

Image 2

December 15 - Corporate Estimated Taxes

The final estimated tax payment for corporations on a calendar year is due on December 15. It’s imperative to meet this deadline to avoid penalties and ensure compliance.

December 15 - Employer Obligations

For employers adhering to monthly deposit rules, December 15 is also the deadline for depositing Social Security, Medicare, and withheld income taxes for the month of November. Additionally, it's the due date for non-payroll tax deposits under similar rules.

Image 3

December 31 - Year-End Considerations

December 31 is the final opportunity to enact any financial moves. Given some institutions may not operate on this day, it's advisable to complete transactions earlier to avoid last-minute issues.

Handling Weekends & Holidays
If a tax deadline falls on a weekend or federal holiday, the due date automatically shifts to the next business day. This ensures no interruptions in meeting tax obligations.

Disaster Area Extensions

Areas designated as disaster zones receive extensions for tax deadlines. For the latest updates on such designations and extended deadlines, visit these resources:

FEMA Declarations
IRS Tax Relief Information

Share this article...

Want tax & accounting tips and insights?

Sign up for our newsletter.

I confirm this is a service inquiry and not an advertising message or solicitation. By clicking “Submit”, I acknowledge and agree to the creation of an account and to the and .