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

Michigan has no general statute setting procedures for private-employer drug tests, so employers may test job applicants under their own written workplace drug policy. Marijuana is legal for adults, but the Michigan Regulation and Taxation of Marihuana Act, MCL 333.27954(3), says it does not prevent an employer from refusing to hire someone for violating a workplace drug policy or for working under the influence, and the medical marihuana law does not require accommodation at work. The State of Michigan has stopped pre-employment marijuana testing for most of its own civil service jobs, but that rule does not bind private employers, as of October 2026.

Michigan drug testing rules at a glance

Does Michigan have a drug testing law for employers?

Not a general one that we found. Michigan does not set a notice form, laboratory standard, confirmation step or retest right for private-employer drug tests the way Minnesota does. That makes the employer's written policy unusually important in Michigan, because the recreational marijuana law ties an employer's freedom to refuse to hire to a "violation of a workplace drug policy." A policy that does not mention marijuana, or does not say that a pre-employment positive is a violation, gives you less to stand on.

A Michigan policy that does the work should say:

• which positions are tested and when (after a conditional offer is the cleanest point);
• which drugs are tested, naming marijuana or THC explicitly if you test for it;
• that a confirmed positive pre-employment result, or a refusal, is a policy violation that ends the offer;
• which laboratory standard and medical review officer you use, and how a candidate reports a prescription; and
• whether you treat medical marihuana cards differently, if you choose to.

What does Michigan's recreational marijuana law say about hiring?

The Michigan Regulation and Taxation of Marihuana Act, adopted as Initiated Law 1 of 2018 and effective December 6, 2018, makes marihuana legal for adults 21 and older. Its employer clause, MCL 333.27954(3), has three sentences, each useful to a recruiter:

1. The Act "does not require an employer to permit or accommodate conduct otherwise allowed by this act in any workplace or on the employer's property."
2. It "does not prohibit an employer from disciplining an employee for violation of a workplace drug policy or for working while under the influence of marihuana."
3. It "does not prevent an employer from refusing to hire, discharging, disciplining, or otherwise taking an adverse employment action against a person with respect to hire ... because of that person's violation of a workplace drug policy or because that person was working while under the influence of marihuana."

The Cannabis Regulatory Agency licenses and regulates adult-use establishments and medical facilities; its rules govern those businesses, not other employers' testing.

What about medical marihuana patients in Michigan?

The Michigan Medical Marihuana Act, Initiated Law 1 of 2008, is the older law. Its only clause that names employers, MCL 333.26427(c)(2), says nothing in the Act requires "an employer to accommodate the ingestion of marihuana in any workplace or any employee working while under the influence of marihuana." The recreational law's MCL 333.27954(2) says it does not limit any privileges, rights, immunities or defenses under the medical law, but it adds no employment protection for patients.

Disability law can still apply to the condition a patient is treated for, so make the decision about the test result under the policy, not about the diagnosis, and route any accommodation question to HR rather than the recruiter.

Does the State of Michigan still test its own applicants for marijuana?

Only for some jobs. For the state classified service, Michigan Civil Service Commission Regulation 2.07 (SPDOC 26-05, effective June 7, 2026) makes every offer to a new hire conditional on passing a pre-employment drug test, and requires testing for marijuana, cocaine, opiates, amphetamines and phencyclidine, "except that marijuana testing is not authorized for a preemployment drug test for a new hire to a position that is not test-designated and cannot be used to rescind a conditional offer of employment to such a position." The regulation also lets a person with an active three-year sanction from a marijuana-positive pre-employment test for a non-test-designated position ask to have it rescinded.

This is a rule for the State as an employer. It does not limit private employers, cities or counties, but it is a useful benchmark if your organization is weighing whether to drop THC from the panel for jobs that are not safety sensitive.

What should a Michigan offer letter say about drug testing?

Because Michigan's marijuana law leans on the employer's own policy, the offer letter is where the policy meets the candidate. Say that the offer is conditional on passing a drug test under the attached or linked policy, name the panel (including THC if you test for it), say where and by when the candidate must give a sample, and say that a confirmed positive or a refusal ends the offer. Tell the candidate how to report a prescription to the medical review officer rather than to the recruiter. Then apply the same steps to every candidate offered the same job, so a decision never looks like it turned on who the candidate is rather than what the policy says.

Which federal rules still apply in Michigan?

• DOT-regulated roles follow 49 CFR Part 40; a commercial driver needs a verified negative pre-employment result before the first safety-sensitive function (49 CFR 382.301).
• Rescheduling. The April 28, 2026 order moved FDA-approved and state-medical-license marijuana to Schedule III; it does not cover Michigan's adult-use sales. DOT's Part 40 guidance (May 15, 2026) says a Michigan patient card still cannot make a DOT positive negative, and 49 CFR 40.151(e) and (f) bar accepting a physician recommendation or a hemp or CBD product claim as a medical explanation.
• Federal contractors need the policy statement and awareness program in the FAR Drug-Free Workplace clause.
• The ADA: see pre-employment medical exams under the ADA.

What should staffing agencies placing workers in Michigan do?

• Have your own written policy. MCL 333.27954(3) protects decisions based on a violation of "a workplace drug policy." If the agency is the employer, the candidate should receive the agency's policy at registration, and it should say how marijuana is treated.
• Match client panels to the order. Some clients test for THC and some do not. Record each client's panel on the job order so candidates are not screened out for a client that would not have tested.
• Keep DOT orders separate. Drivers for DOT-regulated clients follow Part 40 regardless of the state rules.
• Licensing, background checks and onboarding: see Michigan staffing agency licensing, Michigan background check laws and hiring employees in Michigan.

A checklist before you test a candidate in Michigan

1. Write a workplace drug policy that names the drugs tested, including THC if you test for it.
2. Say in the policy that a confirmed pre-employment positive or a refusal is a violation.
3. Give the policy to candidates before testing, and test after a conditional offer.
4. Use a certified laboratory and a medical review officer, and confirm positives.
5. Decide whether to keep THC on the panel for jobs that are not safety sensitive.
6. Keep DOT drivers in the federal program.

Draft the policy from the pre-employment drug testing policy template, and compare states in drug testing laws in hiring.