Iowa Tax Filing Guidance: 3.8% Flat Rate, April 30 Deadline

tax.iowa.gov

Published January 27th, 2026

Detected March 17th, 2026

Summary

The Iowa Department of Revenue has issued guidance for the 2025 tax filing season, reminding taxpayers of available resources and key dates. The notice highlights the new 3.8% flat tax rate and the April 30 filing deadline, encouraging the use of online tools like The Kernel virtual assistant.

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What changed

The Iowa Department of Revenue has released a press release providing guidance for the 2025 tax filing season, which commenced on January 26, 2026. The guidance emphasizes the availability of resources on the department's website, including expanded instructions and a section on "What's New?" which details changes such as the new 3.8% flat tax rate. Taxpayers are reminded that their Iowa income tax returns are due on April 30, 2026, and must be filed concurrently with their federal returns.

This notice serves as a reminder and resource for taxpayers and tax professionals. While it highlights a new tax rate and filing deadline, it does not introduce new compliance obligations beyond standard tax filing procedures. Taxpayers are encouraged to utilize the department's website, virtual assistant "The Kernel," and direct contact methods for assistance. No specific compliance actions are mandated by this notice beyond timely filing and adherence to the stated tax laws.

What to do next

Review "What's New?" section for individual income tax changes, including the 3.8% flat tax rate.
Ensure Iowa income tax returns are filed by the April 30, 2026 deadline.
Utilize available resources on the Iowa Department of Revenue website for tax preparation assistance.

Source document (simplified)

IDR Helps You Prepare for Tax Time 2025

Tuesday, January 27, 2026
Press Release

With tax filing season officially upon us, the Iowa Department of Revenue is once again reminding Iowans of the many resources available that can assist taxpayers with filing their tax return. The Department has begun processing individual income returns today, January 26, the same time as the IRS. Iowa taxpayers are required to provide their federal return with their Iowa return. Iowa income tax returns are due on April 30.

The Department website (revenue.iowa.gov) is a good starting point to find tax forms and answers to a wide range of tax questions. The Tax Guidance section allows taxpayers and tax professionals the ability to search for guidance in a single location. Expanded Instructions provides line by line details to help complete the IA 1040. Specifically for tax year 2025, What’s New? addresses some of the most common filing questions about individual income tax changes, including the new flat tax rate of 3.8%.

Filing Made Easy explains the filing process in three simple steps and includes information on how to file, avoiding common mistakes, and the status of a refund. The Department is committed to helping Iowans understand and comply with their tax obligations. Last year, refund processing averaged 30 days or less throughout the tax season.

The Kernel, GovConnectIowa’s virtual assistant. Available 24/7, including holidays, The Kernel answers general tax and licensing questions with just a few clicks of the keyboard. While The Kernel is designed to provide quick and reliable guidance, he does have some limitations. The Kernel is pre-programmed with responses to frequently asked questions, so users with detailed or situation-specific questions are encouraged to consult their tax preparer or contact the Department directly for personalized assistance. The Kernel is meant to enhance the customer experience by providing quick, reliable information. For more details or to experience The Kernel, visit govconnect.iowa.gov. Ask The Kernel - he’s all EARS!

If you still need assistance, there are multiple ways to contact the Department:

Website: revenue.iowa.gov
Phone: Monday-Friday 8:00 a.m. to 4:30 p.m.
515-281-3114 or 800-367-3388
Email: idr@iowa.gov

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