Key October 2025 Tax Deadlines for Businesses

As autumn unfolds, October 2025 brings vital business tax deadlines that companies must not overlook, covering aspects from corporate filings to payroll. Staying informed about these deadlines is crucial to ensure compliance and sidestep potential penalties.

October 15 - Corporate Tax Deadlines

Corporations must file their 2024 calendar year income tax return (Form 1120) and settle any due tax, interest, or penalties. This requirement is pertinent if an automatic 6-month extension was requested by April 15. Ensuring timely compliance can help maintain financial health and legal standing.Image 1

October 15 - Employer Payroll Deposits

Employers following the monthly deposit rules must deposit Social Security, Medicare, and withheld income tax for September 2025 by October 15. This includes the nonpayroll withholding deposit if applicable. Staying on top of these payments is crucial for maintaining compliance and avoiding fines.

October 15 - Keogh Account Setup Deadline

For the self-employed, October 15, 2025, marks the last opportunity to establish a Keogh Retirement Account for contributions intended for 2024. If an automatic 6-month filing extension was obtained, this deadline is essential to meet retirement saving goals.Image 2

October 31 - Quarterly Filing for Employers

By the end of October, employers must file Form 941 for the third quarter of 2025, ensuring all taxes are deposited following the accuracy of deposit rules. If the total tax liability is under $2,500, it can be paid in full with a timely filed return. For taxes deposited on time, the filing deadline is extended to November 10.

October 31 - Federal Unemployment Tax

Businesses must deposit their Federal Unemployment Tax (FUTA) owed up to September if the amount exceeds $500. Consistent compliance in this area ensures smooth operational continuity and penalty avoidance.Image 3

Considerations for Special Circumstances

Should any deadline fall on a weekend or legal holiday, it automatically extends to the next business day. Additionally, for regions designated as disaster areas, deadlines may extend further. Businesses should verify such extensions through FEMA and the IRS.

By being proactive and leveraging insights from tax planning strategies, including retirement contributions and timely filings, businesses can effectively manage their financial obligations. Keeping abreast of October deadlines is a critical component of sound fiscal management, particularly in aiding clients like those navigating tax complexities in Oklahoma City.

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