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

Wisconsin has no general statute that sets procedures for private-employer drug testing, so employers may test job applicants under their own written policy. Marijuana is not legal in Wisconsin, so the state's off-duty lawful-products protection does not reach it, though it does reach tobacco and alcohol. As of October 2026, the specific rules are: employers may report a failed or refused pre-employment test to the Department of Workforce Development within three business days (Wis. Stat. § 108.133(4)); contractors on public works and public utility projects must test before work starts (§ 103.503); and an employer may not make an applicant pay for a medical examination it requires (§ 103.37).

Wisconsin drug testing rules at a glance

Does Wisconsin have a drug testing law for employers?

Not a general one. Wisconsin has no statute like Minnesota's next door, which sets notice, laboratory and retest rules for every employer that tests. Our Wisconsin hiring guide reached the same conclusion. The Wisconsin rules that touch hiring are narrower and mostly reward a written policy: an unemployment reporting channel for failed applicant tests, a testing mandate for public works and utility contractors, a ban on charging applicants for required exams, and unemployment and workers' compensation rules that turn on the employer's written policy.

So the policy carries the weight. Write down the drugs on the panel, when you test (after a conditional offer is the usual point), which HHS-certified laboratory and medical review officer you use, how a candidate reports prescriptions, and what happens after a confirmed positive or a refusal.

Can Wisconsin employers refuse to hire someone who tests positive for marijuana?

Yes. Possessing THC is an offense under § 961.41(3g)(e), punishable by a fine of up to $1,000 or six months in jail for a first conviction, and no Wisconsin statute protects off-duty marijuana use.

The law candidates sometimes cite is the lawful-products protection. § 111.321 lists "use or nonuse of lawful products off the employer's premises during nonworking hours" among the prohibited bases of employment discrimination, alongside age, race, arrest record and conviction record. Marijuana is not a lawful product in Wisconsin, so that protection does not reach it. It does reach tobacco and alcohol, which matters for panel design: do not add cotinine or an off-duty alcohol marker to an applicant panel to screen people out, unless one of the § 111.35(2) exceptions fits, such as use that "impairs the individual's ability to undertake adequately the job-related responsibilities" or conflicts with a bona fide occupational qualification.

Two cautions. Wisconsin borders Illinois, Michigan and Minnesota, where adult use is legal and employment rules differ; for a remote role worked from one of those states, read Illinois, Michigan or Minnesota first. And a past drug conviction is a separate question from a test result: Wisconsin bars conviction-record discrimination unless the circumstances of the offense substantially relate to the job (§ 111.335(3)(a)); see Wisconsin background check laws.

How does DWD's pre-employment drug testing program work?

§ 108.133(4) lets an employer "voluntarily submit" to the Department of Workforce Development the results of a test "conducted on an individual as a condition of an offer of employment," or notice that the individual declined the test. If the person is collecting unemployment, DWD uses it to decide eligibility, and an employer that reports in good faith "is immune from civil liability" for the report. DWD's program page sets the mechanics:

1. Complete form UCB-18102-E, Pre-Employment Drug Testing, Employer Reported Refusal to Submit or Positive Test Result.
2. For a failed test, submit it within 3 business days of receiving the positive result "from a DHHS certified lab"; for a refusal, within 3 business days of the refusal.
3. Mail it to DWD Unemployment Insurance, P.O. Box 7905, Madison, WI 53707, or fax it to (608) 260-2506.

DWD says failing or refusing a pre-employment test "is presumed to be a refusal of suitable work," and a claimant who failed without good cause is offered treatment and a skills assessment before benefits are denied. The practical points for recruiters: the test must be a condition of a real offer, the lab must be HHS-certified, and the three-day clock starts when you receive the result, so decide in advance who files.

Who pays for a Wisconsin pre-employment test?

The employer, to be safe. § 103.37 says no employer "may require any employee or applicant for employment to pay the cost of a medical examination required by the employer as a condition of employment," with a fine of up to $100 per violation. The statute does not say whether a drug test is a medical examination, and federal law treats a test for illegal drug use as not being one; paying for the test yourself avoids the question. If the drug test is part of a pre-employment physical you require, do not charge the applicant for the physical.

Do Wisconsin public works and utility contractors have to test?

Yes. § 103.503 applies to contractors and subcontractors on projects of public works for state agencies and local governments, and on public utility projects in a public right-of-way. Before starting work, the employer must have a written substance abuse prevention program that:

• prohibits using, possessing or being under the influence of drugs, or under the influence of alcohol, while working on the project;
• requires random, reasonable suspicion and post-accident drug and alcohol testing, and testing "before commencing work on the project," unless the employee has been in a random testing program for the 90 days before starting; and
• bars an employee who tests positive or refuses from working on the project until the employer documents a negative test and the employee's approval to return.

The employer pays for the program and the tests, and testing follows SAMHSA laboratory and chain-of-custody guidelines. Utility workers already tested under 49 CFR Parts 40, 199 or 382 are outside the section.

Why does a written policy matter after hire in Wisconsin?

• Unemployment. § 108.04(5)(a) makes it misconduct to violate "an employer's reasonable written policy" on alcohol or controlled substances, if the employee knew the policy and admitted use, refused a test, or tested positive under a DWD-approved methodology.
• Workers' compensation. Under § 102.58(2), if an employee "violates the employer's policy concerning employee drug or alcohol use and is injured, and if that violation is causal to the employee's injury," no compensation or death benefits are payable, though the employer still owes certain incidental compensation and drug treatment.

Hand the policy to new hires at onboarding and keep their signed acknowledgment; both provisions turn on it.

Which federal rules still apply in Wisconsin?

• 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 change Wisconsin's possession offense, and DOT's Part 40 guidance says a state medical card cannot make a DOT positive negative.
• 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 Wisconsin do?

• Report as the employing unit. When the agency makes the conditional offer and orders the test, the agency files UCB-18102-E within three business days; agree with clients who files when both are involved.
• Public works placements. Workers you supply to a public works or utility contractor must be covered by a § 103.503 program and tested before starting, unless they were in a random pool for the prior 90 days. Confirm whose program covers them before the first shift.
• Do not pass test costs to candidates. § 103.37 applies to "any employer," including an agency.
• The rest of the hiring file: see Wisconsin staffing agency rules, E-Verify in Wisconsin, Wisconsin non-competes, recording consent for interviews and hiring employees in Wisconsin.

A checklist before you test a candidate in Wisconsin

1. Adopt a written drug and alcohol policy and have every new hire acknowledge it.
2. Keep tobacco and off-duty alcohol markers off the applicant panel unless counsel approves an exception.
3. Make the offer conditional on the test, use an HHS-certified lab, and pay for the test.
4. Route positives through a medical review officer.
5. Report a failed or refused test to DWD on UCB-18102-E within 3 business days if you choose to.
6. For public works or utility projects, put the § 103.503 program in place before work starts; keep DOT drivers in the federal program.

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