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Before going into the details, here is your quick checklist for starting an S corp in Kansas.
An S corporation is a federal tax classification under Subchapter S of the Internal Revenue Code. It is not a standalone business structure. An eligible Kansas LLC or C corporation files IRS Form 2553 to request S corp status. Once approved, the business does not pay federal corporate income tax on its profits. Instead, income and losses pass through directly to shareholders' personal tax returns, where they are taxed at the individual level.
To start an S corporation in Kansas, you first form a business entity, either an LLC or a C corporation, through the Kansas Secretary of State. After your entity is active, you file Form 2553 with the IRS within the required deadline. Kansas automatically accepts the federal S corp election and does not require a separate state level filing. Kansas S corporations generally do not pay Kansas corporate income tax at the entity level; income passes through to shareholders, who report it on their individual Kansas returns. S corporations doing business in Kansas file Form K-120S with the Kansas Department of Revenue each year.
Note that banks, savings and loan associations, and trust companies with Subchapter S federal status are NOT treated as S corps for Kansas purposes; they are required to file the Kansas privilege tax return instead.
| Scenario | Deadline | Effective Tax Year |
|---|---|---|
| Existing business, calendar year | March 16, 2026 | 2026 |
| New business formed January 15, 2026 | April 1, 2026 | 2026 |
| New business formed June 1, 2026 | August 15, 2026 | 2026 |
| Filed during prior year (2025) | December 31, 2025 | 2026 |
For existing calendar-year businesses, IRS rules require you to file Form 2553 by the 15th day of the third month of the tax year. In 2026, March 15 falls on a Sunday, so the deadline shifts to March 16, 2026.
New businesses have 2 months and 15 days from their formation date to file. Miss that window, and you will need to request a late election with a reasonable cause statement, or wait until the following tax year for the election to take effect.
LLC members who do not elect S corp status pay self-employment tax (15.3%) on all net profits from the business. With an S corp election, you split your income between a W-2 salary and distributions. Only your salary is subject to payroll taxes. Distributions are not, which can produce meaningful savings at higher income levels.[3]
As an S corp owner, you pay yourself a reasonable salary for the work you do in the business. Any remaining profits can then be taken as distributions. Distributions are not subject to self-employment taxes, which allows you to keep more of what your business earns while staying fully compliant with IRS requirements.
The Tax Cuts and Jobs Act allows qualifying S corp owners to deduct up to 20% of their qualified business income (QBI) from their personal tax returns under Section 199A. Distributions from an S corp may qualify for this deduction, reducing your federal taxable income further. W-2 salary payments do not qualify, so structuring your compensation correctly matters.[4]
Kansas allows S corporations to elect to pay the Pass-Through Entity Tax (PTET) at the entity level on behalf of shareholders. The PTET rate is 5.58% of taxable income allocated to Kansas. Shareholders receive a refundable Kansas income tax credit for their direct share of the PTET paid by the S corporation. For shareholders affected by the federal $10,000 SALT deduction cap, the PTET election may produce a net tax benefit. This optional election is made annually and should be evaluated with a Kansas tax professional.
Electing S corp status does not change your LLC's legal structure, operating agreement, or management setup. Your members run the business exactly as before. You keep the same liability protection and operational control. The only change is how the IRS treats your business income, not how Kansas recognizes your legal entity.
A C corporation pays federal income tax on its profits at the corporate level. When those profits are distributed to shareholders as dividends, shareholders pay income tax a second time on their personal returns. An S corp election eliminates this second federal tax layer. Profits pass through directly to shareholders and are taxed once at the individual level for federal purposes.
S corp shareholders can deduct business losses on their personal tax returns, up to the amount of their basis in the company. C corporation shareholders have no equivalent benefit, losses stay at the corporate level. This pass through of losses is particularly valuable during startup years or periods of lower revenue.
C corporations that retain earnings beyond reasonable business needs may be subject to the IRS accumulated earnings tax. S corporations avoid this penalty because profits pass through to shareholders each year rather than accumulating at the entity level. This gives Kansas S corp owners more flexibility in how they manage earnings without triggering additional federal tax exposure.
Kansas does not impose a franchise tax on ordinary business corporations. Kansas S corporations owe no separate franchise tax on their entity-level income. The only annual state-level filing for most Kansas S corps is Form K-120S with the Department of Revenue and the biennial information report with the Secretary of State.
Selling a C corporation can trigger taxation at two levels: the corporation pays tax on the gain from an asset sale, and shareholders pay again on distributions. An S corp election can allow a sale to be structured in a way that avoids this double layer of tax on the gain, potentially increasing after-tax proceeds when Kansas business owners plan an exit or ownership transfer.
For a full walkthrough, visit our How to Start an LLC in Kansas guide.
For a complete walkthrough, visit our How to Start a C Corporation in Kansas guide.
Already have an active Kansas LLC or C corporation? Skip directly to Step 2.
Once your Kansas LLC or C corporation is active, you file IRS Form 2553 to officially request S corp tax treatment. Kansas automatically recognizes the federal election. No separate Kansas state filing is required.
All shareholders must sign before submission.
Submit by mail or fax. There is no filing fee.
Keep your fax confirmation receipt. The IRS will send a CP261 acceptance notice within approximately 60 days.[5]
Once your S corp election takes effect, IRS rules require you to pay yourself a W-2 salary if you work in the business.
Due by March 16, 2026 for calendar-year S corporations. Each shareholder receives a Schedule K-1 showing their share of income or loss.
S corporations doing business in Kansas file Form K-120S, Partnership or S Corporation Income Tax Return with the Kansas Department of Revenue each year.
Important Kansas deadline: Form K-120S is due one month after the federal due date, April 15, 2026 for calendar year S corps. Any tax liability is also due April 15. This is different from the federal Form 1120-S deadline of March 15.
Kansas accepts the federal extension automatically: if you filed IRS Form 7004 for a federal extension, enclose a copy with your K-120S to automatically receive a 6-month Kansas filing extension. The extension applies to filing only; any tax owed is still due April 15.
Each shareholder receives a Kansas Schedule K-1 reflecting their share of Kansas S corp income, which they report on their individual Kansas income tax return (Form K-40).[7]
Kansas S corporations generally do not pay Kansas corporate income tax at the entity level. Income passes through to shareholders, who pay Kansas individual income tax on their share of S corp profits. Confirm current Kansas individual income tax rates with the Kansas Department of Revenue, as rates have been changing. Kansas has a graduated individual income tax structure.
Kansas allows S corporations to annually elect to pay the PTET at the entity level. The PTET rate is 5.58% of Kansas taxable income allocated to shareholders. Shareholders receive a refundable Kansas income tax credit for their share of PTET paid by the S corporation. This optional election is made on Form K-120S and may benefit shareholders subject to the federal SALT deduction cap. The election is made annually and is not binding in future years.
Your underlying Kansas LLC or corporation must file an information report with the Kansas Secretary of State every two years. The filing schedule is based on your formation year:
Failing to file can result in administrative dissolution or forfeiture of good standing.
S corporations doing business in Kansas file Form K-120S with the Kansas Department of Revenue by April 15 for calendar-year filers. Kansas accepts the federal extension automatically. Any tax owed is still due by April 15. Do not confuse this with the federal March 15 deadline; the two are a month apart.
Due March 15 for calendar-year filers (March 16 in 2026). A six-month extension is available by filing IRS Form 7004.
File every two years based on your formation year through the Kansas Secretary of State's online business filing system. Failing to file can result in loss of good standing.[8]
The IRS requires S corp owner-employees to receive a reasonable salary for work performed in the business. The IRS scrutinizes compensation levels in S corp audits. A Kansas tax professional can help you set a defensible salary.
Register for Kansas withholding tax through the Kansas Customer Service Center. File Kansas withholding returns on the schedule assigned by the Kansas Department of Revenue.[9]
If you have employees, also register for Kansas unemployment insurance through the Kansas Department of Labor.[10]
Kansas corporations must maintain meeting minutes, director and shareholder actions, and financial statements. Kansas LLCs have more flexible requirements but should maintain organized records regardless.
The IRS provides a path for late elections under Revenue Procedure 2013-30:
For LLCs filing a late election, you may also need to file IRS Form 8832 alongside Form 2553.[11]
To revoke the election, shareholders holding more than 50% of stock must file a written revocation statement with the Ogden, UT IRS service center. File by March 16 of the current tax year for it to take effect that year. After that date, revocation takes effect the following year.
Once revoked, the entity generally cannot re-elect S corp status for five years without IRS consent.
