Montana — Termination

Montana is the only US state that replaced the at-will employment doctrine with a statutory good-cause termination standard. Under the Wrongful Discharge from Employment Act, a discharge is wrongful if it was not for good cause and the employee had completed the employer's probationary period. This means that post-probation employees in Montana cannot be terminated without a job-related reason, distinguishing Montana from the 49 other states that generally allow at-will termination.

Source: Mont. Code Ann. § 39-2-904(1)(b)

The Montana Wrongful Discharge from Employment Act defines "good cause" as "any reasonable job-related grounds for an employee's dismissal" based on one of four statutory prongs. This definition sets the substantive standard that determines whether a post-probation termination is lawful in Montana.

The four prongs

Good cause exists when the dismissal is based on:

(a) the employee's failure to satisfactorily perform job duties;

(b) the employee's disruption of the employer's operation;

(c) the employee's material or repeated violation of an express provision of the employer's written policies; or

(d) other legitimate business reasons determined by the employer while exercising the employer's reasonable business judgment.

Prong (d) functions as a general reasonableness standard that captures terminations outside the first three categories, so long as the employer's decision is job-related and reflects reasonable business judgment. The phrase "reasonable job-related grounds" in the chapeau qualifies all four prongs; personal animus or reasons unrelated to the employment relationship do not satisfy the statute.

Off-duty lawful conduct exclusion

The statute carves out an explicit exclusion: "The legal use of a lawful product by an individual off the employer's premises during nonworking hours is not a legitimate business reason, unless the employer acts within the provisions of 39-2-313(3) or (4)." This means an employer cannot terminate an employee for off-duty tobacco use, alcohol consumption (where lawful), or other legal product use during non-work hours, subject only to the narrow exceptions in Mont. Code Ann. § 39-2-313(3) (bona fide occupational requirement) and (4) (avoiding a conflict of interest or violation of a federal regulation or law).

Legislative history — the 2021 restructuring

The current four-prong structure of the good-cause definition was enacted in 2021. Previously, the law described good cause with less specific enumeration, notably rolling violations of written personnel policies into “other legitimate business reason.” Prong (c)—regarding written personnel policy violations—existed before 2021. The 2021 amendments did not create a new written-policy prong but instead clarified and strengthened it by adding "materially" (instead of any violation) and added the requirement that the violation must have deprived the employee of a fair and reasonable opportunity to remain employed. The statute’s overall structure was amended to enumerate these four prongs distinctly under § 39-2-903(5) for clarity.

Source: Mont. Code Ann. § 39-2-903(5)

Default probationary period (updated 2021)

Under the Montana Wrongful Discharge from Employment Act (WDEA), the default probationary period for a new employee is twelve months from the date of hire if the employer does not establish an alternative period at the time of hire. This change—moving the default from six to twelve months—was made by the legislature in 2021 (HB 254, effective April 1, 2021). During this probationary period, the employer may terminate the employee without showing good cause. The updated statute provides: "If an employer does not establish a specific probationary period at the time of hire, the probationary period is the first 12 months of employment." (Mont. Code Ann. § 39-2-910(2)).

Extension of probationary period and statutory limits

Montana law allows the probationary period to be extended under two main conditions:

1. The extension must be established in writing at the time of hire, or by mutual written agreement between employer and employee during the original probationary period;
2. The total probationary period—including extensions—cannot exceed 18 months from date of hire. Any extension must be by mutual written agreement made before the original probationary period expires (Mont. Code Ann. § 39-2-910(3)).

Special rule re: leaves of absence

Absences from work (such as medical leave) do not automatically extend the probationary period under current law. Only if the employer and employee mutually agree in writing to extend the period due to a leave, and do so during the initial probation, is such an extension valid. Otherwise, the 12- or 18-month clock continues to run regardless of absences.

Summary table:

• Default: 12 months if not otherwise specified at hire
• Maximum (with written mutual extension): 18 months total
• Leaves: Do not extend probation unless expressly agreed to before expiration

These statutory rules are critical because, until the probationary period ends, the WDEA does not require good cause for termination. After the probation is completed, the employee is protected against discharge absent good cause under the WDEA framework.

Material update: In 2021, the default probationary period changed from 6 to 12 months; leaves do not automatically extend the period.

Source: Mont. Code Ann. § 39-2-910 Source: 2021 Mont. Laws Ch. 177 (HB 254)

Under Montana's Wrongful Discharge from Employment Act, Mont. Code Ann. § 39-2-904(1)(c) provides that a discharge is wrongful if "the employer materially violated an express provision of its own written personnel policy prior to the discharge, and the violation deprived the discharged employee of a fair and reasonable opportunity to remain in a position of employment with the employer."

Material violation of written policy

• The statute requires the employer's violation be both “material” (not trivial) and of an “express provision” in its own written personnel policy. The policy must be written and specific; the text does not expand on what renders a violation material, nor does it provide examples.

Deprivation of fair and reasonable opportunity

• The statutory language also requires that the employee was deprived of a "fair and reasonable opportunity to remain employed" as a result of the violation. However, the text of § 39-2-904(1)(c) does not provide a definition for this phrase, nor does it offer illustrations or further guidance within the statute itself.

Authority gap

• As of this writing, neither § 39-2-904(1)(c) nor its codified official notes supply a further statutory or regulatory definition of what is “material” or what constitutes a “fair and reasonable opportunity.” Absent primary case law or regulatory interpretation, practitioners must rely on the plain text for application.

Source: Mont. Code Ann. § 39-2-904(1)(c)

Montana’s Wrongful Discharge from Employment Act (WDEA), codified at Mont. Code Ann. § 39-2-912, expressly excludes certain employment relationships from its scope:

• Collective bargaining agreements: If the employee is covered by a written collective bargaining agreement, the WDEA does not apply. Disputes must be resolved under that agreement or through federal labor law channels.

• Written contracts for a specific term (fixed-term contracts): The statute also exempts employees under a written contract for a specified term, even if that contract includes both a probationary period (per § 39-2-910) and an automatic renewal clause.

In short: If an employee is governed by one of those two agreements, the WDEA’s requirement to prove “good cause” after probation, exhaustion of internal grievance procedures, and its exclusive remedy structure do not apply. Those employees are instead governed by the terms of their contract or agreement.

Source: Mont. Code Ann. § 39-2-912

Montana’s Wrongful Discharge from Employment Act (WDEA) treats managerial and supervisory employees distinctively at the point of discharge. Mont. Code Ann. § 39-2-904(3) states expressly: “The employer has the broadest discretion when making a decision to discharge any managerial or supervisory employee.” This phrase is not mere surplusage: it signals that courts must show heightened deference to the employer’s business judgment when evaluating the discharge of these categories of employees.

The good-cause standard under Mont. Code Ann. § 39-2-904(1)(b) and § 39-2-903(5) still applies, meaning employers must articulate reasonable job-related grounds for dismissal. However, when the person being discharged is a manager or supervisor, the employer’s rationale—if grounded in business needs and not contradicted by evidence of pretext, discrimination, or violation of explicit statutory limits—will be accepted with broader latitude. Montana Supreme Court decisions reinforce this point: in Buck v. Billings Montana Chevrolet, Inc., the court held that “legitimate business reason” means one that is neither false, whimsical, arbitrary, nor capricious, and that bears a logical relationship to the business’s needs. Later cases (e.g., McConkey v. Flathead Elec. Coop., Sullivan v. Continental Construction) reiterate that courts are not to second-guess the “fit” or trust relationship at the managerial level absent clear statutory violation or proven bad faith.

In practice, this means subjective business judgments—such as a loss of confidence in a manager, perceived loss of leadership effectiveness, or concern about internal alignment—will typically satisfy the good-cause requirement if documented and rooted in the manager’s duties. For non-managerial roles, courts scrutinize the evidence more closely to ensure good cause is not a pretext. For managers and supervisors, the legislative intent is clear: deference to business judgment is at its highest.

Source: Mont. Code Ann. § 39-2-904(3) Source: Mont. Code Ann. § 39-2-903(5) Source: Buck v. Billings Montana Chevrolet, Inc., 811 P.2d 537 (Mont. 1991) Source: Sullivan v. Continental Construction of Montana, LLC, 299 P.3d 832, 370 Mont. 8 (2013)

Montana’s Wrongful Discharge from Employment Act (WDEA) recognizes wrongful discharge claims when termination occurs in retaliation for an employee’s refusal to violate public policy or for reporting a violation of public policy. Under Mont. Code Ann. § 39-2-904(1)(a), an employee has a cause of action if they are discharged in retaliation for either (1) refusing to violate public policy or (2) asserting, or reporting, a violation of public policy by the employer. These statutory protections apply after the employee’s probationary period ends, but are carved out even during probation if the discharge is specifically for refusal to violate, or for reporting, a violation of public policy (see § 39-2-904(2)).

What does “public policy” mean under Montana law?

The statute defines “public policy” in § 39-2-904(7): “Public policy” means a policy in effect at the time of discharge concerning public health, safety, or welfare, and established by constitutional provision, statute, or administrative rule or regulation. It must be a rule clearly set by law—not mere employer policy or personal moral views. Employer policies and general public sentiment do not meet the statutory definition: the policy must be established in Montana law and in effect when the discharge occurs.

How does the protection work?

To claim under this prong, the employee must show: (1) the discharge was in retaliation for refusing to violate, or for reporting a violation of, a specific public policy; and (2) that the public policy was established and active at the time. Courts look for a direct link between the employee’s legally protected action and the adverse employment decision. There is no shifted burden or implied subjective standard in the law—the key is whether the employee, in fact, refused to violate or reported a violation of a public policy as defined by statute, constitutional provision, or rule.

Source: Mont. Code Ann. § 39-2-904

Montana is one of the only states to provide explicit statutory protection against wrongful termination for an employee’s legal expression of free speech, including on social media. This protection was added by the 2023 Legislature through Senate Bill 270, effective October 1, 2023.

Statutory language: Under Mont. Code Ann. § 39-2-904(1)(d), an employee’s discharge is considered wrongful if “the employer terminated the employee solely based on the employee’s legal expression of free speech, including but not limited to statements made on social media.”

Scope: The law as enacted does not define “legal expression of free speech” or restrict the application only to off-duty conduct, nor does it create statutory exceptions for work rules on harassment, confidentiality, or codes of conduct. As written, the protection applies so long as the speech is legal and constitutes the sole reason for the discharge. The text is silent on how cases involving mixed motives (protected speech plus other reasons) should be adjudicated.

Application note: This protection is distinct from the existing “public policy” exception in § 39-2-904(1)(a); it applies even when no discrete public policy or whistleblower issue is implicated. As of June 2026, no reported Montana court decisions or administrative opinions interpret this new subsection, so direct practical guidance is not yet available.

Summary: Employers in Montana may not fire an employee solely for their legal speech—including on social media—regardless of whether that speech implicates public policy. Any further limits or interpretations, including the effect of workplace policies, will likely develop through future litigation or rulemaking.

Source: Mont. Code Ann. § 39-2-904(1)(d) Source: 2023 Mont. Laws Ch. 365 (SB 270)

Note: The session law PDF source link was updated to the current official legislature URL; statutory content unchanged as of June 2026.