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

Idaho lets private employers drug test job applicants as a condition of hiring, provided the testing complies with the Americans with Disabilities Act (Idaho Code 72-1702). The state's Employer Alcohol and Drug-Free Workplace Act, Idaho Code 72-1701 to 72-1717, is voluntary: an employer that follows it, with a written policy available to applicants, laboratory-confirmed results and a seven-working-day retest right, gets protection from lawsuits and from unemployment claims. As of October 2026, Idaho has no medical or adult-use marijuana law, and contractors on state construction projects must run a drug-free workplace program that meets the act.

Does Idaho have a drug testing law for private employers?

Yes, but it is a set of voluntary guidelines rather than a mandate. Idaho Code 72-1701 says the act "establishes voluntary drug and alcohol testing guidelines for employers" that, when followed, make a positive test misconduct under the employment security law. The core permission is in 72-1702(1): "It is lawful for a private employer to test employees or prospective employees for the presence of drugs or alcohol as a condition of hiring or continued employment," as long as the testing complies with the ADA. The same section says the act does not change anyone's at-will status.

An employer that chooses not to test faces no claim for that choice: 72-1710 bars causes of action based on the absence of a testing program, a failure to test for a given drug, or ending a program. What an employer gains by following the act is a set of protections:

• No claim over the hiring decision. Under 72-1708, a confirmed positive, a refusal to provide a sample or an altered sample can be the basis for "disciplinary or refusal-to-hire action," and that action "shall not create any cause of action against the employer."
• A presumption that the result was valid. 72-1711 limits claims over a false result to cases where the employer knew or clearly should have known it was wrong, and presumes a result valid if the collection and testing rules were followed.
• Unemployment misconduct. A discharge based on a confirmed positive, a refusal or a tampered sample is work-related misconduct if the employer complied with the chapter (72-1707).
• A possible premium reduction. For workers' compensation policies issued or renewed since July 1, 1999, an insurer may grant a premium reduction for a compliant program (72-1716).

What does a compliant pre-employment test look like in Idaho?

1. Adopt a written policy. 72-1705 requires a written policy consistent with the act, including "a statement that violation of the policy may result in termination due to misconduct." Testing must be carried out within a policy "that has been communicated to affected employees, and is available for review by prospective employees," and the policy must list the types of tests, such as baseline, preemployment, post-accident, random, return to duty, follow-up and reasonable suspicion. A policy negotiated with a union gets the act's full benefits even if it differs from the statute.
2. Collect samples properly. 72-1704 calls for reasonable and sanitary conditions, a collector instructed in proper methods, due regard for privacy, labeling and chain-of-custody records, and handling that guards against contamination or substitution.
3. Confirm before acting. Drug testing "shall include a confirmatory test" before a result is used for action under 72-1707 or 72-1708: a second test of the same sample by a laboratory using "a chromatographic technique such as gas chromatography-mass spectrometry or another comparable reliable analytical method." A positive saliva alcohol screen needs a confirmatory test by a different method, and a positive breath test needs a second breath test at least 15 minutes later.
4. Give written notice and a chance to explain. Under 72-1706(1), any "employee or prospective employee" who tests positive must get written notice of the result, including the type of substance, and an opportunity to discuss and explain it with a medical review officer or other qualified person.
5. Honor the retest request. The person may ask for the same sample to be retested by a mutually agreed laboratory within seven working days of the first confirmed positive notice. The requester may be asked to pay, but if the retest is negative the employer reimburses the cost (72-1706(2)).

Results are confidential and are the employer's property, for internal business use, disputes under the act, federal reporting such as DOT rules, or legal process (72-1712).

Who pays for an Idaho drug test?

For current employees, 72-1703 makes testing work time and puts the cost on the employer, apart from the retest rule. The act does not say who pays for an applicant's first test, but 72-1709 gives a strong reason to pay it: an unemployment claimant who turns down suitable work because a pre-employment test is required has failed to accept suitable work, "unless the claimant is required to pay for costs associated with a negative drug or alcohol test result." Charging applicants takes away that benefit-denial rule, so paying for the pre-employment test is the safer choice for an employer following the act.

What does Idaho say about marijuana and hiring?

Idaho has no medical or adult-use marijuana program, and marijuana is listed in Schedule I of the state's controlled substances act (Idaho Code 37-2705). We found no Idaho statute that protects off-duty marijuana use or out-of-state medical card holders in hiring, so a confirmed THC positive can be handled like any other positive under the employer's policy. The act also says a person whose results are confirmed positive is not, "by virtue of those results alone," a person with a disability under the Idaho Human Rights Act (72-1713).

One ballot measure is pending. House Joint Resolution 4, adopted by the House 58-10 on March 5, 2025 and by the Senate 29-6 on March 11, 2025, would amend the Idaho Constitution so that only the Legislature has the power to legalize marijuana, narcotics or other psychoactive substances. The Secretary of State's 2026 voter pamphlet lists it for the November 3, 2026 general election; no marijuana legalization initiative is on that ballot. A yes vote would take legalization off the initiative route, and a no vote leaves current law as it is, so the outcome does not change an employer's right to test.

Neighboring states treat cannabis differently. For a job performed in Idaho, Idaho law applies; for a job performed across the line, follow that state's rules, for example in Washington, which limits pre-employment decisions based on off-duty cannabis use, or Montana, where marijuana is a lawful product under its off-duty conduct law.

How do Idaho workers' compensation and unemployment treat a positive test?

• Workers' compensation. Idaho Code 72-208(2) says that if intoxication "is a reasonable and substantial cause of an injury, no income benefits shall be paid," unless the employer supplied the intoxicant or knowingly let the intoxicated employee keep working. Intoxication covers alcohol and controlled substances but not a prescribed drug taken as directed.
• Unemployment. Under 72-1707, a discharge based on a confirmed positive drug test, an alcohol result of at least .02 that is above the level in the employer's policy, a refusal, an altered sample or a substituted sample is misconduct, provided the employer complied with the chapter.

Do Idaho public contractors and public employers have to test?

State construction contractors do. Idaho Code 72-1717 makes eligibility for any state contract "for the construction or improvement of any public property or publicly owned buildings" depend on a drug-free workplace program that complies with the chapter "for employees, including temporary employees," maintained for the life of the contract. Work may be subcontracted only to subcontractors that meet the same requirement, and the bidder submits an affidavit of compliance with its bid.

The state and its political subdivisions may test under the act "and as otherwise constitutionally permitted" (72-1715), and a public entity that tests all employees and applicants it constitutionally may qualifies for the premium reduction in 72-1716(2).

Which federal rules still apply in Idaho?

• DOT-regulated roles. Commercial drivers and other covered transportation workers follow 49 CFR Part 40, and a driver needs a verified negative pre-employment result before the first safety-sensitive function (49 CFR 382.301). Idaho's confidentiality section expressly allows disclosures DOT rules require.
• Rescheduling did not change DOT testing. The April 28, 2026 final order moved FDA-approved and state-medical-license marijuana to Schedule III, and DOT's Part 40 Q&A, updated May 15, 2026, says a medical review officer still cannot verify a marijuana positive as negative because of a state card or a state-licensed product.
• Federal contractors follow the FAR Drug-Free Workplace clause.
• The ADA is written into 72-1702 itself. A test for illegal drugs is not a medical exam, but questions about prescriptions after a positive are; see pre-employment medical exams under the ADA.

What should staffing agencies placing workers in Idaho do?

• Put the policy in front of applicants. The act's protections depend on a written policy that is available for review by prospective employees and lists preemployment testing; give it with the application or the conditional offer and keep a signed acknowledgment.
• Prepare for state construction job orders. 72-1717 names temporary employees, so a prime contractor bidding state work needs to know that the temps you supply are covered by a compliant program.
• Track the seven-working-day window. Note the date you give written notice of a positive so a retest request is handled on time.
• Limit who sees results. 72-1712 keeps results confidential and for internal business use; get the worker's written authorization before you report anything beyond pass or fail to a client.

For registration, see Idaho staffing agency licensing; for the rest of onboarding, hiring employees in Idaho and Idaho E-Verify requirements; and for criminal history and other screens, Idaho background check laws.

Idaho drug testing laws at a glance

A checklist before you test a candidate in Idaho

1. Write a policy that lists preemployment testing and says violation may lead to termination for misconduct.
2. Make it available to applicants before the test, and say in the posting that the offer depends on a drug test.
3. Use a collector trained in the act's procedures and a laboratory that confirms positives by GC-MS.
4. Give written notice of any positive, offer a medical review officer conversation, and handle retest requests within seven working days.
5. Pay for the pre-employment test, and keep results in a confidential file apart from the hiring file.
6. Draft from the drug testing policy template and compare other states in drug testing laws in hiring; neighboring Wyoming and Utah take different approaches.