Montana drug testing laws for employers: pre-employment testing rules (2026)

Montana lets employers drug test job applicants as a condition of hire, but only through a "qualified testing program" under the Workforce Drug and Alcohol Testing Act, MCA 39-2-205 to 39-2-211. As of October 2026, that means a written policy made available to employees 60 days before it takes effect, testing paid for by the employer, urine collection and confirmation that follow federal 49 CFR Part 40 procedures, and medical review officer certification of any positive before the employer acts. Marijuana is legal for adults in Montana and is listed as a lawful product under the off-duty conduct law, but employers keep the right to act under an established drug policy.

Does Montana have a drug testing law for private employers?

Yes. The Workforce Drug and Alcohol Testing Act sets out what a testing program must look like. Its definitions in MCA 39-2-206 shape who it reaches:

• Employer: a person or entity with one or more employees located in or doing business in Montana, including the governing body of a local government.
• Employee: someone performing, supervising or managing work in a hazardous work environment, a security position, or a position affecting public safety or health, requiring driving a motor vehicle for any part of the work, or involving fiduciary responsibility for the employer. Independent contractors are excluded.
• Hazardous work environment includes federally tested transportation and pipeline work, operating or working near construction equipment, industrial machinery or mining activities, and handling flammable materials, explosives or toxic chemicals.
• Prospective employee: someone who has applied, in writing or orally, to become an employee.

Because "employee" is defined by position type, confirm that a role falls into one of those categories before you rely on the act for testing it. Many warehouse, driving, finance and healthcare roles will; some office roles may not.

What are Montana's rules for pre-employment drug tests?

MCA 39-2-208 allows an employer to test any prospective employee as a condition of hire. The program has to meet MCA 39-2-207:

1. Adopt a written policy and give 60 days' notice. The policy must be available to all employees 60 days before it takes effect or changes. It must cover, among other items, the standards of conduct, the employee assistance available, the types of tests, the substances tested and the alcohol threshold, the testing procedures including how disputes are resolved, confidentiality, and the employer's hiring policy for applicants who test positive.
2. Pay for the test. The employer pays for testing and pays employees their regular rate, with benefits, for testing time (section 39-2-207(3)).
3. Follow federal collection rules. Urine collection and confirmation follow 49 CFR Part 40. Other sample types need equally strict split-specimen, chain-of-custody and mass-spectrometry confirmation procedures (section 39-2-207(4)).
4. Use a medical review officer. A trained MRO reviews and certifies a positive result before the employer acts, and the person tested may report medications and other relevant medical information (section 39-2-207(5)).
5. Breath alcohol tests must be given by a certified breath alcohol technician on federally listed equipment, and a result above 0.04 counts as alcohol present (section 39-2-207(6), (7)).

Once a person is on payroll, MCA 39-2-209 gives the tested employee a copy of the report, a retest of the split sample at an independent lab of the employee's choice (employer pays if negative, employee pays if positive) and the chance to rebut or explain the result. MCA 39-2-210 bars adverse action, including follow-up testing, against an employee who presents a reasonable explanation or medical opinion that the result was not caused by illegal drug use or alcohol, subject to the marijuana rules in MCA 16-12-108. Those two sections are written for employees; for applicants, write an equivalent explanation step into your policy, since the policy must describe dispute resolution anyway.

MCA 39-2-211 keeps test information confidential and out of evidence, except for legal actions over the program, some accident inquiries and reports a licensing authority requires.

What does Montana say about marijuana and hiring?

Montana voters approved adult-use marijuana with Initiative 190 in November 2020, and the law has since been amended by the Legislature in 2021, 2023 and 2025. Two statutes decide what an employer may do:

• MCA 16-12-108(5). This section says nothing in the marijuana chapter requires an employer to permit or accommodate marijuana in the workplace or on its property, stops it from disciplining an employee for violating a workplace drug policy or working while intoxicated, or stops it from declining to hire, discharging or disciplining for those reasons. It also says the chapter does not allow a wrongful discharge or discrimination claim against an employer.
• MCA 39-2-313. The lawful products law defines a lawful product to include marijuana and generally bars refusing to employ someone because of legal use off the employer's premises during nonworking hours. It exempts use that affects job performance or others' safety, and actions taken under an established substance abuse or alcohol program or policy that the employer reasonably believes are permitted.

Read together, an employer with an established written drug policy can generally still decline to hire for a marijuana-positive test, while an employer without one, or one that reaches for off-duty use outside its policy, is exposed under section 39-2-313. If you test for THC, say so in the policy and apply it the same way to everyone.

Which federal rules still apply in Montana?

• DOT-regulated roles. Drivers and other covered transportation workers follow 49 CFR Part 40 and their agency's rule; the FMCSA requires a verified negative pre-employment result before a driver's first safety-sensitive function (49 CFR 382.301). Montana's act borrows Part 40's urine procedures for everyone else.
• Marijuana rescheduling did not change DOT testing. The April 28, 2026 order placed FDA-approved and state-medical-license marijuana in Schedule III, and DEA scheduled a hearing on broader rescheduling to begin June 29, 2026. DOT's Part 40 guidance (May 15, 2026) says a state-licensed product still cannot turn a positive into a negative, and 49 CFR 40.151 bars accepting hemp or CBD claims.
• Federal contractors need the policy statement and awareness program in the FAR Drug-Free Workplace clause.
• The ADA treats a test for illegal drug use as outside its medical exam rules; see pre-employment medical exams under the ADA.

What should staffing agencies placing workers in Montana do?

• Match the position test. Light industrial, driving and healthcare placements usually fit the act's hazardous-environment, driving or public-safety categories; administrative placements may not. Record why a role is covered before you test for it.
• Mind the 60-day clock. If a new client requires testing and your policy does not yet cover it, the change has to be available to employees 60 days before it takes effect.
• State your applicant rule. The policy must say how you treat applicants who test positive; use the same rule across clients unless the policy spells out client-specific differences.
• Check licensing separately in Montana staffing agency licensing.

Montana drug testing laws at a glance

A checklist before you test a candidate in Montana

1. Confirm the role fits the act's definition of employee, and write down why.
2. Publish the written policy at least 60 days before testing starts, including your rule for applicants who test positive.
3. Use a collector and lab that follow 49 CFR Part 40 for urine, and an MRO for every positive.
4. Decide whether THC is on the panel and state it in the policy, so actions fall within the lawful-products exception.
5. Pay for the test and keep results in a confidential file separate from the hiring file.

To compare Montana with stricter states, read drug testing laws in hiring; to write the policy, adapt the pre-employment drug testing policy template; and for the rest of onboarding, see hiring employees in Montana. Iowa also lets employers test any applicant, under its own written-policy rules.