Kansas Personal Tax Extension | K-40V Individual Income Tax Payment Voucher Rev. 7-22

Modified on Sat, 13 Jun at 11:44 AM

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Kansas Personal Tax Extension Guide

K-40V · Individual Income Tax · Personal Filing Guide

Your Filing Status

You've Been Extended

Your Kansas return is extended to October 15, 2026. File now to get your refund faster.

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Kansas's Extension Tied to Federal Approval

Kansas grants an automatic six-month extension for filing personal income tax returns to taxpayers who have been approved for a federal extension by the IRS. The Kansas Department of Revenue mirrors the federal extension timeline, moving the state filing deadline from April 15, 2026, to October 15, 2026. No separate Kansas extension application is required.

Important: Attach Form 4868 When You File Your Return

When you file your Kansas state tax return by October 15, you must attach a copy of your federal Form 4868 to the return. Failing to include this documentation may cause processing complications. Keep a copy of your filed Form 4868 readily available when you prepare your Kansas return.

Payment Is Still Due by April 15

Kansas's extension applies only to filing your return—not to paying your taxes. Any Kansas income tax owed must still be paid by April 15, 2026. Use Form K-40V to make a payment by mail, or pay online through the Kansas Department of Revenue's portal.

How to Make Extension Payments

ACH Debit: Go to www.ksrevenue.org for an online transaction through the Kansas Department of Revenue Customer Service Center.
Credit Card: Go to www.ksrevenue.org/eservices.html for a current list of authorized third-party vendors. A convenience fee applies.

Using Form K-40V

Form K-40V (Individual Income Tax Payment Voucher) is used for mailing an extension payment to Kansas. Mail the form with payment to:
Kansas Income Tax
Kansas Department of Revenue
P.O. Box 750260
Topeka, KS 66699-0260

Late Filing and Payment Penalties

Kansas imposes a 1% monthly penalty on unpaid tax for both failure to file and failure to pay, each capped at 24%. Both penalties can run simultaneously, making timely payment and filing essential.

Best Practices

File IRS Form 4868 first—Kansas's automatic extension depends on your federal extension.
Pay any Kansas income tax owed by April 15, 2026.
Attach a copy of your Form 4868 when you file your Kansas return by October 15.
Use ksrevenue.org for online ACH payments for a fast, secure transaction.

Final Thoughts

Kansas's extension process is straightforward with a federal extension in place. Pay your balance by April 15, attach your Form 4868 when filing, and submit your return by October 15, 2026.

Quick Reference Table

State Abbreviation	KS
State Name	Kansas
Extension Status	Approved with Federal Extension
Return Due Date	April 15, 2026
Extended Due Date	October 15, 2026
Other Information	Automatic 6-month extension with IRS approval. Attach a copy of federal Form 4868 when filing your Kansas return. Any taxes owed must be paid by April 15 to avoid penalties.
Online Payment	Kansas \| Online Tax Extension Payment
Payment Voucher Title	K-40V \| Individual Income Tax Payment Voucher
State Payment Agency	Kansas Department of Revenue
Mailing Address with Payment	Kansas Income Tax Kansas Department of Revenue P.O. Box 750260 Topeka, KS 66699-0260
Online Payment Options \| Credit Card	Visit www.ksrevenue.org/eservices.html for authorized third-party vendors. A convenience fee applies.
Online Payment Options \| ACH Debit	Visit www.ksrevenue.org for an online ACH transaction through the Customer Service Center.
Failure to File Penalties	1% of unpaid tax per month, up to 24%.
Failure to Pay Penalties	1% of unpaid tax per month, up to 24%.

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