2025 Arkansas State Tax Deadlines

Arkansas Individual Income Tax Filing Deadlines and Extensions for 2025 for Tax Professionals.

If you are a tax professional working with clients who are residents or have been involved in significant business operations within Arkansas, then you might need to file Arkansas State Taxes on their behalf. This page outlines the most important tax deadlines and tax extensions for Arkansas in 2025.

2025 Arkansas State Tax Deadlines

If your clients are residents or have been involved in significant business operations within Arkansas, they might be required to file Arkansas State Taxes. This page outlines the most important tax deadlines and tax extensions for Arkansas in 2025.

Arkansas Business Tax Deadlines for 2025

C Corporation

Arkansas C Corporation Tax Deadlines for 2025 

You must file and pay Corporate Income Taxes in Arkansas by April 15, 2026.

• File Online with Arkansas Taxpayer Access Point
• File by Mail must be postmarked by the due date
• Form AR1100CT – Arkansas Corporation Income Tax Return

Extension to File Taxes in Arkansas for 2025
The Extension Deadline for Arkansas corporate tax returns is October 15, 2026.

Arkansas automatically grants a six-month extension on filing corporate income tax returns. This means you do not need to file for an extension in Arkansas.

This is an extension to FILE, not an extension to PAY – payment is still due April 15, 2026.

Pass-Throughs

Arkansas S Corporation & Partnership Tax Deadlines for 2025
You must file in Arkansas by April 15, 2026.

• File Online with Arkansas Taxpayer Access Point
• File by Mail must be postmarked by the due date
• Forms:
  • AR1100S – S-Corporation Income Tax Return
  • AR1050 – Partnership Income Tax Return

Extension to File S Corporation & Partnership Taxes in Arkansas for 2025
The Extension Deadline for Arkansas S Corporation and Partnership tax returns is October 15, 2026.

Arkansas automatically grants a six-month extension on filing pass-through entity tax returns. This means you do not need to file for an extension in Arkansas.

This is an extension to FILE, not an extension to PAY – payment is still due March 15, 2026.

Arkansas Individual Tax Deadlines for 2025

Estimated Tax Deadline for Arkansas 2025
Estimated tax payments are due:

• April 15, 2025
• June 16, 2025
• September 15, 2025
• January 15, 2026

Individual Tax Deadline for Arkansas 2025
You must file and pay Individual Income Taxes in Arkansas by April 15, 2026.

• File Online with Arkansas Taxpayer Access Point
• File by Mail must be postmarked by the due date
• Forms:
  • Form AR1000F – Full Year Resident Individual Income Tax Return
  • Form AR1000NR – Nonresident or Part Year Resident Individual Income Tax Return

Extension to File Taxes in Arkansas for 2025
The Extension Deadline for Arkansas individual income tax returns is October 15, 2026.

Arkansas automatically grants a six-month extension on filing personal income taxes. This means you do not need to file for an extension in Arkansas.

This is an extension to FILE, not an extension to PAY – payment is still due April 15, 2026.

Sources

• Arkansas Department of Finance and Administration
• Individual Filing Information
• Tax Forms

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The material discussed on this page is meant for general illustration and/or informational purposes only and is not to be construed as investment, tax, or legal advice. You must exercise your own independent professional judgment, recognizing that advice should not be based on unreasonable factual or legal assumptions or unreasonably rely upon representations of the client or others. Further, any advice you provide in connection with tax return preparation must comply in full with the requirements of IRS Circular 230.