DOT drug and alcohol testing for new carriers, explained

Who has to test

Anyone who drives a vehicle that needs a CDL, and the company they drive for (49 CFR 382.103). That generally means a truck or combination over 26,000 lbs, a vehicle built to carry 16 or more people including the driver, or any vehicle carrying hazmat that needs placards. It covers drivers who only run inside one state, not just interstate carriers.

If none of your drivers need a CDL, these rules don't apply, though you still check each driver's past drug and alcohol violations when you hire them (49 CFR 391.23(e)).

Before anyone drives

1. Join a consortium or set up your own program. A consortium, also called a third-party administrator, puts your drivers in a random testing pool, sends them to collection sites and keeps the results. Most small carriers use one. FMCSA doesn't approve or recommend any, so compare a few.
2. Register in the Clearinghouse as an employer and buy queries ($1.25 each). The Clearinghouse is FMCSA's database of drivers' drug and alcohol violations.
3. Write your policy and give it to every driver. It has to explain who's covered, what's prohibited, when tests happen, what counts as a refusal and what happens after a violation. Each driver signs a receipt, and you keep it (49 CFR 382.601). Consortiums usually provide a template.
4. Get a negative pre-employment drug test for each driver and have the verified result in hand before they drive for you (49 CFR 382.301). A pre-employment alcohol test is optional.
5. Run a full Clearinghouse query on each driver before they drive. The driver has to register in the Clearinghouse and give consent there (49 CFR 382.701(a)). That query also replaces asking previous trucking employers about drug and alcohol violations, unless the driver worked under another DOT agency's testing rules, such as for an airline or railroad, in the past 3 years.
6. Train anyone who supervises drivers: at least 60 minutes on alcohol misuse and 60 minutes on drug use, so they can spot when a driver needs a reasonable suspicion test (49 CFR 382.603).

If you're the only driver

You're both the employer and the driver, so both sets of rules apply to you (49 CFR 382.103(b)).

• You must be in a random pool with at least one other driver. Joining a consortium is how you do that.
• In the Clearinghouse, register as an employer and as a driver, and designate your consortium so it can report violations for you. Signing up with a consortium doesn't do this step for you; it's a separate action in the Clearinghouse.
• You still need your own pre-employment drug test and Clearinghouse query before your first trip.

Every year

• Random tests. In 2026 the minimum is 50% of your average number of drivers for drugs and 10% for alcohol (49 CFR 382.305). Tests are unannounced and spread across the year, so a driver can be picked more than once or not at all. Your consortium runs the selection.
• A Clearinghouse query for each driver, at least once a year (49 CFR 382.701(b)). A limited query, which only says whether a record exists, is enough, and the driver can consent once to cover several years. If it finds a record, you have 24 hours to run a full query or take the driver off the road.

When something happens

• After an accident. Test the driver if someone died. Also test if the driver got a ticket for a moving violation and either someone was treated away from the scene or a vehicle had to be towed. The alcohol test should happen within 2 hours and can't happen after 8; the drug test can't happen after 32 hours. If you miss a window, write down why (49 CFR 382.303).
• Reasonable suspicion. A trained supervisor who sees signs of drug or alcohol use orders a test (49 CFR 382.307).
• After a violation. The driver can't drive until they've seen a substance abuse professional, passed a return-to-duty test and started follow-up testing (49 CFR part 40, subpart O). Violations go into the Clearinghouse, and since November 18, 2024, states remove the commercial privilege from that driver's license until they finish.

What to keep

• Positive results, refusals and alcohol results of 0.02 or higher: 5 years
• Records of how tests were collected, and supervisor training: 2 years
• Negative results: 1 year
• Each driver's signed policy receipt and your Clearinghouse query records

(49 CFR 382.401)

What the auditor checks

Five of the 16 violations that fail the new entrant safety audit automatically are about drug and alcohol testing: having no testing program, having no random testing, and using a driver who tested positive, refused a test, or had an alcohol level of 0.04 or higher. Letting a driver start before you have a negative pre-employment test, skipping a required post-accident test, and falling short of the random testing rates also count against you in the audit's scoring (49 CFR part 385, Appendix B).

Want a second pair of eyes?

The audit file check covers your testing program through a short yes-or-no questionnaire, along with your driver, vehicle and hours-of-service records, and sends you a written gap list within 2 business days. It starts at $199. I never collect drug or alcohol test results or Clearinghouse records. It isn't a guarantee you'll pass; the auditor decides.