2027 Kansas Tax Deadlines

Last updated: July 29, 2026

Key Kansas tax dates at a glance

This block is the single date reference for 2027 Kansas filing, payment, estimated-payment, and extension planning.

• April 15, 2027: First Kansas estimated payment for calendar-year Individuals.
• June 15, 2027: Second Kansas estimated payment.
• September 15, 2027: Third Kansas estimated payment.
• January 18, 2028: Fourth Kansas estimated payment.
• April 17, 2028: Kansas S Corporation and Partnership Form K-120S returns due for calendar-year filers.
• April 18, 2028: Kansas Individual return and payment due; Kansas C Corporation payment due.
• May 18, 2028: Kansas C Corporation Form K-120 filing due for calendar-year filers.
• October 16, 2028: Extended Kansas Individual, S Corporation, and Partnership returns due; payment is not extended.
• November 16, 2028: Extended Kansas C Corporation return due; payment is not extended.

When are Kansas taxes due in 2027?

Kansas's 2027 calendar-year pass-through returns are generally due April 17, 2028; Individual returns and C Corporation payments are due April 18, 2028; and C Corporation Form K-120 filings are due May 18, 2028. Estimated payments run quarterly during the 2027 year, while extensions move filing only into October or November 2028 by entity type. Kansas currently applies a two-bracket Individual rate schedule of 5.2% and 5.58%; confirm tax-year 2027 thresholds when KDOR publishes the 2027 instructions.

When are Kansas C Corporation taxes due for 2027?

Kansas C Corporations file Form K-120 by May 18, 2028, and pay the expected balance by April 18, 2028. Kansas C Corporations file one month after the federal corporate due date, but the expected Kansas corporate income tax payment remains due by the federal payment date.

What does the Kansas C Corporation extension change?

The extended filing deadline for a calendar-year Kansas C Corporation return is November 16, 2028. The extension gives more time to file, not more time to pay, so the expected balance remains due April 18, 2028. Keep federal Form 7004 with the Kansas C Corporation extension workpapers when a federal corporate extension supports the Kansas filing calendar.

When are Kansas S Corporation and Partnership taxes due for 2027?

Kansas S Corporations file Form K-120S for S Corporations and Partnerships file Form K-120S for Partnerships by April 17, 2028.

What pass-through payment rules should teams watch?

Kansas uses Form K-120S for both S Corporations and Partnerships. An extension does not postpone tax, withholding, or other required payments. The projected extended filing deadline is October 16, 2028; payment and election deadlines are not automatically postponed.

When are Kansas Individual taxes due for 2027?

A Kansas Individual return using Form K-40 for resident and nonresident Individual income tax returns is due by April 18, 2028, and any remaining state income tax should be paid by April 18, 2028.

When is the Kansas Individual extension deadline?

The extended filing deadline for a 2027 Kansas Individual income tax return is October 16, 2028. The extension applies to filing only, so the payment deadline remains April 18, 2028.

When are Kansas estimated payments due?

Calendar-year Kansas estimated payments are due on this schedule:

• April 15, 2027.
• June 15, 2027.
• September 15, 2027.
• January 18, 2028.

Who must make Kansas estimated payments?

Taxpayers who expect a Kansas income-tax balance after withholding and credits may need estimated payments. Apply the tax-year 2027 threshold, safe-harbor, and voucher instructions when the filing-year guidance is released.

What Kansas rules should tax professionals watch for 2027?

Beyond the core due dates, Kansas has separate filing, payment, pass-through, credit, and retirement-income items worth tracking for 2027:

Why does Kansas split C Corporation filing and payment dates?

Kansas Form K-120 is filed one month after the federal corporate due date, but payment remains due April 18, 2028, so filing and payment controls need separate owners.

What should teams know about Kansas Form K-120S?

Kansas uses Form K-120S for both S Corporations and Partnerships, with the calendar-year return due April 17, 2028, and the extended filing deadline on October 16, 2028.

Which Kansas credits and incentives need fact-checking before the 2027 filing?

Rural Opportunity Zone credits, agriculture-related incentives, HPIP, angel investor credits, and R&D credits should be checked against current KDOR eligibility, certification, carryforward, and sunset rules before use.

How should retirement income be handled for Kansas Individuals?

Kansas excludes Social Security benefits from state taxable income under current law and provides subtractions for qualifying Kansas public retirement benefits; other retirement items should be checked against 2027 Schedule S instructions.

Tax-professional context: Build separate controls for original returns, extensions, estimated payments, pass-through obligations, nonresident sourcing, and industry filings. Reconfirm tax-year 2027 rates, thresholds, forms, and electronic-filing mandates before finalizing the calendar. Tax firms can also use the accounting firm directory to connect Kansas-specific compliance work with specialist support.

Electronic filing and payment: Use Kansas Customer Service Center to file, pay, manage notices, and verify account activity. Confirm whether the return type is subject to mandatory electronic filing.

Federal income-tax deduction: The current Kansas Individual instructions do not provide a blanket deduction for federal income taxes paid. Kansas starts with federal adjusted gross income and allows specified federal and Kansas adjustments, so verify the tax-year 2027 Schedule S instructions before claiming any federal-related deduction.

Rural Opportunity Zones: Kansas Rural Opportunity Zone benefits historically included income-tax credits and student-loan repayment assistance. Current DOR guidance limits the income-tax credit to qualifying domiciles established before January 1, 2026, and tax years ending before January 1, 2027, so do not assume a tax-year 2027 credit without a legislative extension.

Agricultural focus and credits:

• Beginning farmer incentives and applicable credits.
• Agricultural equipment and input sales-tax exemptions.
• Agricultural land valuation and property-tax rules.
• Drought, casualty, and income-timing considerations.
• Kansas-source and withholding rules for agricultural Partnerships.

Business incentives:

• High Performance Incentive Program (HPIP).
• Kansas Angel Investor Tax Credit.
• Research and development tax credit.
• Business and job development or job-creation credits.

Energy sector considerations: Oil, gas, utility, and renewable-energy businesses should separately review Kansas severance tax, property-tax classification, sales-tax exemptions, apportionment, and industry-specific incentive rules.

What sources support these Kansas deadlines?

• Kansas Corporation Income Tax Forms and Instructions.
• Kansas S Corporation and Partnership Forms and Instructions.
• Kansas Individual Income Tax Forms and Instructions.
• Kansas Tax Calendar.

Kansas tax deadlines for local and entity filings

Kansas teams need to coordinate corporate returns, pass-through filings, Individual deadlines, and local tax considerations without losing the state-specific context behind each date. Instead's AI-driven tax platform keeps the work organized around the calendar.

Use filing for Kansas return execution, grids to review client status, and fixed-assets to prepare payment and extension decisions before deadlines arrive. Built for tax professionals who want a better tax operation system to manage compliance and advisory work for clients.