Kansas State Tax Extension: The Complete Guide

Navigating tax season can be challenging.

Fortunately, filing a tax extension in Kansas provides extra time to organize your finances and ensure the accuracy of your return.

However, remember that a Kansas tax extension only applies to the filing deadline, not the payment deadline.

If you owe state taxes, you must pay at least 90% of your estimated liability by April 15th to avoid penalties and interest.

This guide explains how to file a Kansas tax extension, covering eligibility, deadlines, payment requirements, and answers to frequently asked questions.

Overview of Kansas Tax Extension Requirements

What is a Tax Extension?

A Kansas tax extension grants taxpayers additional time to submit their state income tax returns.

This extension allows more time to prepare and file, but does not extend the payment deadline.

To avoid penalties, taxpayers are still required to pay at least 90% of their estimated liability by the April deadline.

Quick Kansas Tax Extension Facts

• Automatic Extension: An approved federal extension will automatically extend the Kansas filing deadline.
• Payment Deadline: Any taxes owed must be paid by April 15th to avoid penalties.
• Form K-40V: This form is only needed if a payment is required. You do not need to submit this form if your withholding or estimated payments cover at least 90% of your liability.

Important Kansas Extension Deadlines and Requirements

When is the Deadline to File a Kansas Tax Extension?

The deadline to file a Kansas tax extension aligns with the federal tax deadline, which is April 15th, 2026, for the 2025 tax year.

This extended filing time allows you to submit your return until October 15th, 2025, but any taxes owed must still be paid by April 15th.

Do I Need to File a Kansas Tax Extension if I Already Filed a Federal Extension?

Kansas will automatically grant a state extension if you’ve filed a federal extension using Form 4868.

Include a copy of your federal extension when you submit your Kansas return.

If you owe state taxes, complete and submit Form K-40V and your payment by April 15th.

If I File a Tax Extension for Kansas, When is My New Deadline?

With an approved extension, your new deadline to file a Kansas return is October 15th, 2025.

Remember, this extension only applies to submitting your return; the April 15th deadline for any payments owed remains unchanged.

How to Request an Extension in Kansas

Step-by-Step Guide to Filing a Kansas Tax Extension

Follow these steps to successfully file a Kansas tax extension and submit any required payments:

1. File a Federal Extension (if applicable)

• Filing Form 4868 with the IRS for a federal extension will automatically extend your Kansas deadline.
• Pro Tip: Keep a copy of your federal extension form, as you’ll need it when filing your tax return.

2. Calculate Payment Needs

• Estimate your tax liability and ensure at least 90% is paid by April 15th. You won’t need to make an extra payment if your withholding or estimated payments already cover what you owe.
• Example: If your tax liability is $10,000, you must pay at least $9,000 by April 15th to avoid penalties.
• Note: Use the Kansas Department of Revenue’s e-file payment system to avoid delays and ensure timely submission.

3. Prepare Form K-40V (Kansas Payment Voucher)

• Use Form K-40V if you need to make a payment. Complete the form with your name, address, and Social Security number.
• If filing jointly, provide your spouse’s information as well.

4. Choose a Payment Method

• Visit the Kansas Department of Revenue - Payment Portal to electronically pay via credit card or e-check. This method is fast and secure, ensuring your payment is processed immediately.
• Mail Form K-40V and payment to: Kansas Income Tax, Kansas Department of Revenue, PO Box 750260, Topeka, KS 66699-0260
• Ensure your payment is postmarked by April 15 to meet the deadline.

5. Save Your Records

• Keep copies of all forms and proof of payment for your records. This will be essential if you have any questions about your extension or payment.

Potential Consequences of Not Filing Properly

If you owe additional taxes and fail to use Form K-40V to submit payment, the Kansas Department of Revenue may misapply your payment.

Kansas applies a graduated penalty structure starting at 2% for late payments, increasing up to 15%, plus 1% per month for continued non-payment (up to a maximum of 24%).

Interest is set annually—9% for 2025—and is not compounded.

Always use Form K-40V when submitting an extension payment and keep documentation for your records.

FAQs: Kansas Tax Extensions

Do I Need to Pay My Kansas Taxes When I File a Tax Return Extension?

Yes, Kansas requires paying at least 90% of your tax liability by April 15th, even if you file for an extension. Interest and penalties may apply to any unpaid balance if you don't meet this requirement. If you are eligible for a refund, you can still file for an extension and ensure you receive the maximum refund possible.

Who is Eligible for a Tax Extension in Kansas?

Kansas taxpayers can receive a tax extension by filing a federal extension Form 4868.

What Are the Penalties for Filing My Tax Return Late in Kansas?

If your return is late, Kansas applies a graduated penalty:

• 2% if paid within 5 days
• 5% within 6–15 days
• 10% after 15 days
• 15% if unpaid after 25 days and no response to the notice

An additional 1% per month may be added, up to a total of 24%.

Interest is charged at 9% for 2025, determined annually by the Kansas Department of Revenue. Interest is not compounded.

What Are the Penalties for Paying My Taxes Late in Kansas?

Failure to pay taxes by April 15th may result in a graduated penalty starting at 2% and increasing up to 15%, plus 1% per month for continued non-payment (up to a maximum of 24%). Interest is 9% for 2025 and is not compounded.

What Are the Consequences of Not Using Form K-40V When Required?

If you need to make a payment but don’t submit Form K-40V, this could lead to:

• Misallocation of your payment, potentially resulting in late penalties
• Graduated penalties ranging from 2% to 15%
• An additional 1% monthly penalty up to a 24% total
• Interest charged at 9% annually for 2025 (not compounded)
• Difficulty in proving compliance during future audits

Always use Form K-40V when submitting an extension payment to avoid these issues.

How Do I Know If I Should File a Tax Extension for Kansas?

Consider an extension if you need more time to gather documents, organize finances, or avoid mistakes on your return.

However, you’ll still need to pay at least 90% of your taxes by April 15th to avoid penalties.

Can I File a Kansas Extension if I Don’t Owe Any Taxes?

Yes. As long as you file a valid federal extension (Form 4868), Kansas will automatically extend your filing deadline—even if no payment is required.

Key Kansas Tax Deadlines

Kansas follows the federal due dates for tax filing. If a due date falls on a weekend or holiday, returns and payments are due the next business day.

Important Kansas Deadlines from the Tax Calendar

• April 15th: Deadline to file your Kansas income tax return or request an extension and pay any taxes owed.
• October 15th: Extended filing deadline if you filed for an extension.

Kansas Tax Payment Instructions: Form K-40V

To make an extension payment for your Kansas income tax, follow these steps for completing Form K-40V:

1. Fill Out Personal Information - Enter your name, address, Social Security number, and spouse’s information (if filing jointly).
2. Payment Details - Make checks or money orders payable to “Kansas Income Tax.” Write your Social Security number on the payment.
3. Mail the Payment - Do not attach Form K-40V to your return. Mail it separately to the Kansas Department of Revenue at the specified address.

Exploring Kansas Tax Trends and County Comparisons

Understanding the tax landscape in Kansas is essential for navigating the complexities of tax extensions.

This section explores key trends in state tax revenue and compares tax collections across counties.

These insights reveal how tax policies impact residents and businesses differently, highlighting the broader implications of tax extensions.

County Comparison of Tax Collections

This chart shows how tax collections vary across Kansas counties, detailing per capita contributions for individual income, sales, vehicle property, and real/personal property taxes.

For example, counties like Johnson and Sedgwick contribute more in income and sales taxes, reflecting stronger local economies, while smaller rural counties often rely more heavily on property taxes.

These insights highlight where tax extensions may offer the most relief.

Kansas Tax Revenue Trends

This chart tracks Kansas's tax revenue over the past six years, illustrating growth and dips.

Noticeable increases in 2021 likely relate to economic recovery post-pandemic, with steady growth continuing into 2023.

Understanding these trends provides context for tax policy decisions and the potential impact of tax extensions on different sectors.

View the Kansas Revenue Annual Report

Conclusion

Filing a Kansas tax extension can make things less stressful by giving you more time to file your taxes correctly. However, remember that the extension only provides more time to file, not more time to pay.

If your withholdings or estimated payments cover at least 90% of your tax liability, you may not need to make additional payments.

However, timely payment is essential to avoid penalties and interest if you owe taxes.

Need Help? Get Personalized Assistance!

Need help getting started? Use our simple online tools at e.file-tax to submit your Kansas tax extension quickly and accurately. Start your extension today.