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Kansas Business State Tax Extension I LLCs / Partnerships Filing Guide

Form K-120V | Kansas Corporate Income Tax Voucher  ·  LLCs / Partnerships  ·  Business Filing Guide

Overview

Kansas LLCs and partnerships are subject to state tax filing requirements, administered by the Kansas Department of Revenue. Kansas grants an automatic extension tied to an approved IRS extension, making the process simple for businesses that have already filed IRS Form 7004.

Original Filing Deadline

• The original due date for the Kansas LLCs / Partnerships return is March 16, 2026. File or remit full payment by this date to remain in good standing.
• Extension Period & Extended Deadline
• Kansas automatically grants an extension to file, provided you have obtained an approved federal extension from the IRS by filing IRS Form 7004. With a valid IRS extension, the Kansas extended deadline becomes September 15, 2026. No separate state extension form is required—the federal extension serves as your Kansas extension.

Payment Is Still Due by Original Deadline

The extension applies to filing only—it is not an extension to pay taxes owed. Any outstanding tax liability must be paid by the original due date of March 16, 2026 to avoid penalties and interest. Use the Kansas | Online Tax Extension Payment to pay electronically. For mail-in payments, use Form K-120V | Kansas Corporate Income Tax Voucher and send to: Kansas Department of Revenue Corporate Estimated Tax P.O. Box 3506 Topeka, KS 66625-3506

Late Filing and Payment Penalties

• Failure to File: 1% of the unpaid balance of tax due per month or fraction thereof, not to exceed 24% in the aggregate.
• Failure to Pay: 1% of the unpaid balance of tax due per month or fraction thereof, not to exceed 24% in the aggregate.

Best Practices

• Estimate and pay your Kansas business tax by March 16, 2026 to avoid interest and penalties.
• File IRS Form 7004 with the IRS to secure your federal extension, which Kansas automatically honors.
• Use the state online payment portal for fast, convenient electronic payment.
• Set a reminder to file your completed Kansas LLCs / Partnerships return by September 15, 2026.

Final Thoughts

• Kansas’s business tax extension is straightforward once your federal extension is approved. Pay 100% of any tax due by March 16, 2026 and file your LLCs / Partnerships return by September 15, 2026.
• Quick Reference Table
• State Abbreviation
• KS
• State Name
• Kansas
• Business Entity Type
• LLCs / Partnerships
• Extension Status
• Approved with Federal
• Return Due Date
• March 16, 2026
• Extended Due Date
• September 15, 2026
• Other Information
• Kansas grants your business an automatic 6-month extension provided you have obtained an approved IRS extension. The extension is NOT an extension to pay any taxes you may have due. Tax payments are due by the original return due date.
• Online Payment
• Kansas | Online Tax Extension Payment
• Payment Voucher Form
• Form K-120V | Kansas Corporate Income Tax Voucher
• State Payment Agency
• Kansas Department of Revenue
• Mailing Address with Payment
• Kansas Department of Revenue Corporate Estimated Tax P.O. Box 3506 Topeka, KS 66625-3506
• Failure to File Penalties
• 1% of the unpaid balance of tax due per month or fraction thereof, not to exceed 24% in the aggregate.
• Failure to Pay Penalties
• 1% of the unpaid balance of tax due per month or fraction thereof, not to exceed 24% in the aggregate.

Working with a Tax Professional

Business tax returns are complex—a licensed CPA or Enrolled Agent can maximize deductions, ensure accurate calculations, and handle filing on your behalf. Here's how working with a TaxPro typically goes:

1. 1Get matched with a verified U.S.-based CPA or Enrolled Agent
2. 2Upload your business documents via secure drag-and-drop
3. 3Review and approve your return with upfront, transparent fees
4. 4Your TaxPro files your Kansas return by September 15, 2026

Quick Reference Table

State Abbreviation	KS
State Name	Kansas
Business Entity Type	LLCs / Partnerships
Extension Status	Approved with Federal
Return Due Date	March 16, 2026
Extended Due Date	September 15, 2026
Other Information	Kansas grants your business an automatic 6-month extension provided you have obtained an approved IRS extension. The extension is NOT an extension to pay any taxes you may have due. Tax payments are due by the original return due date.
Online Payment	Kansas | Online Tax Extension Payment
Payment Voucher Form	Form K-120V | Kansas Corporate Income Tax Voucher
State Payment Agency	Kansas Department of Revenue
Mailing Address with Payment	Kansas Department of Revenue Corporate Estimated Tax P.O. Box 3506 Topeka, KS 66625-3506
Failure to File Penalties	1% of the unpaid balance of tax due per month or fraction thereof, not to exceed 24% in the aggregate.
Failure to Pay Penalties	1% of the unpaid balance of tax due per month or fraction thereof, not to exceed 24% in the aggregate.