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LEARNING CENTER

Essential October 2025 Business Tax Deadlines

Embrace the crisp fall weather while staying on top of crucial tax deadlines for your business this October. From corporate filings to payroll and retirement contributions, it's vital to keep these dates in mind to maintain compliance and avoid penalties.

October 15 - Corporate Tax Filings

Ensure your corporate financial health by filing the 2024 calendar year income tax return (Form 1120) and settling any tax, interest, or penalties due. This deadline is only applicable if you filed for an automatic 6-month extension by April 15.

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October 15 - Payroll Taxes

For employers following monthly deposit rules, October 15 is the critical date to deposit Social Security, Medicare, and withheld income tax for September 2025. This also includes nonpayroll withholding taxes if applicable.

October 15 - Retirement Planning

If you are self-employed and received an automatic 6-month extension, October 15 is your final date in 2025 to establish a Keogh Retirement Account for 2024 contributions. Additionally, this day marks the last opportunity to contribute to a SEP or Keogh retirement plan if your tax return is extended through October 15.

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October 31 - Quarterly Payroll Filings

File Form 941 for the third quarter of 2025, and deposit any remaining tax following the accuracy of deposit rules. If your liability is less than $2,500, payment in full accompanies the return. Timely deposits give you a filing grace period up to November 10.

October 31 - Federal Unemployment Tax

Make necessary deposits for taxes owed through September if they exceed $500.

Weekends & Holidays

Remember, if a deadline falls on a weekend or legal holiday, it extends to the next business day that isn’t a holiday.

Disaster Relief and Extensions

For those in disaster-declared areas, deadlines can extend to accommodate recovery. Stay informed by visiting FEMA and the IRS for updates.

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