Kansas Non-Compete Agreement

Introduction

Key Things to Know

1. 1

   A non-compete agreement is a contract in which one party, usually an employee, agrees not to compete with a business for a set time and area after the relationship ends. In Kansas an employee non-compete is enforceable only if it is reasonable.

2. 2

   Kansas has no statute that voids non-competes or governs them generally. Enforceability turns on common-law reasonableness, and courts in Kansas ask whether the covenant is ancillary to a lawful contract, supported by valid consideration, and reasonable (Weber v. Tillman, 259 Kan. 457 (1996)).

3. 3

   Kansas sets no salary or income threshold that makes a non-compete valid or invalid. Enforceability depends on the reasonableness of the terms, not on how much the employee earns, so do not rely on any other state's wage-floor figure.

4. 4

   Courts in Kansas generally weigh four factors: whether the covenant protects a legitimate business interest (trade secrets, confidential information, or customer relationships and goodwill), whether it imposes an undue burden on the employee, whether it injures the public welfare, and whether its time and territory are reasonable. Ordinary competition is not a protectable interest.

5. 5

   Kansas has no statutory advance-notice period before signing. On consideration, Kansas courts have generally treated an offer of employment, continued at-will employment, or a new benefit such as a raise or access to confidential information as enough to support a non-compete.

6. 6

   Kansas is a modification (reformation) state: if a covenant is overbroad, a Kansas court may narrow the unreasonable terms, for example shortening an excessive time period or geographic area, and enforce it to a reasonable extent rather than voiding it entirely.

7. 7

   Because even a valid non-compete is limited, Kansas employers also protect confidential information through a confidentiality or non-disclosure agreement and the Kansas Uniform Trade Secrets Act (K.S.A. 60-3320 et seq.), which guards trade secrets without restraining where a former employee may work.

Kansas Requirements for Non-Compete Agreement

• Enforceable Only If Reasonable

  In Kansas an employee non-compete is enforceable only if it is reasonable. There is no statute voiding non-competes or governing them generally; enforceability turns on common-law reasonableness. Courts in Kansas require the covenant to be ancillary to a lawful contract, supported by valid consideration, and no broader than necessary to protect a legitimate business interest (Weber v. Tillman, 259 Kan. 457 (1996)).

• No Income Threshold

  Kansas has no salary or income threshold that makes a non-compete valid or invalid. Unlike states that permit non-competes only above a wage floor, Kansas judges the restraint on its reasonableness, not the employee's pay (though a lower-wage worker may have a stronger undue-burden argument). Do not rely on any other state's salary figure when the worker is in Kansas.

• Four-Factor Reasonableness Test

  Courts in Kansas generally weigh four factors: whether the covenant protects a legitimate business interest (trade secrets, confidential information, or customer relationships and goodwill), whether it imposes an undue burden on the employee, whether it injures the public welfare, and whether its time and territory are reasonable. Preventing ordinary competition is not a protectable interest in Kansas.

• Reasonable Duration and Area

  Kansas sets no fixed maximum duration or mileage, but the time period and geographic area must be no greater than necessary to protect the employer's interest, weighed against the burden on the employee. Time limits of roughly six months to two years are more likely to be upheld in Kansas; an overbroad term risks being found unreasonable and narrowed by the court.

• Kansas Modifies Overbroad Covenants

  Kansas is a modification (reformation) state, not a strict blue-pencil state. If a covenant is overbroad, a Kansas court may narrow the unreasonable terms, for example shortening an excessive time period or geographic area, and enforce it to a reasonable extent rather than voiding it entirely. This is more employer-favorable than states that only strike severable words, but draft narrowly because the court decides what is reasonable.

• Consideration and No Notice Rule

  Kansas has no statutory advance-notice period before signing a non-compete. The covenant must be supported by valid consideration; Kansas courts have generally treated an offer of employment, continued at-will employment, or a new benefit such as a raise, promotion, or access to confidential information as sufficient. Give real consideration and document it.

• Physician Non-Competes Enforceable

  Physician non-competes are enforceable in Kansas under the same reasonableness test as other covenants, with courts weighing the practice's interest against injury to public access to health care (Idbeis v. Wichita Surgical Specialists, P.A., 279 Kan. 755 (2005)). A 2026 bill (SB 504) to ban most physician non-competes died in committee, so physician covenants in Kansas remain subject to case-by-case review.

• Protect Trade Secrets Too

  Because even a valid non-compete is limited, Kansas employers also protect confidential information with a confidentiality or non-disclosure agreement and the Kansas Uniform Trade Secrets Act (K.S.A. 60-3320 et seq.). This protects trade secrets and customer data without restraining where a former employee may work, and is available in Kansas regardless of whether a non-compete would be enforceable.