How do I handle random drug testing for my drivers?

Chapter 01

Does the DOT require random drug testing, and who picks the drivers?

Yes. The DOT requires random drug and alcohol tests for every driver who needs a CDL to drive your trucks. Each year you must test at least 50 percent of your average number of drivers for drugs. For alcohol, the minimum is 10 percent (the random testing rule). The names must be picked by a “scientifically valid method”, such as a computer that draws random numbers. Every driver must have an equal chance at every draw. Most small fleets let a consortium run the draw. An owner who is the company’s only driver must be in a pool of two or more (the rule for a company with one driver).

Here is how that looks in real life. Say you run four trucks with four drivers. When you got your authority, you joined a consortium. That is a testing company that runs the random draw for many small carriers. The rules call it a consortium or third party administrator, C/TPA for short, and you will see those letters on its papers (the rule’s definitions). It puts your four drivers in one big pool with drivers from other carriers. Four times a year, its computer draws names from the whole pool.

How many tests does that mean for you? On your own, four drivers at 50 percent would mean 2 drug tests a year. Alcohol at 10 percent would come to less than one. In a consortium, the rate is counted over the whole pool. FMCSA’s written guidance says this meets your duty “even though the required percent of the employer’s drivers were not randomly tested” (FMCSA’s guidance from 1997). So one year none of your drivers may be picked, and another year three may be. The same guidance says it “will even out” over time. But the rule still makes you check two things. The consortium must test at the right rate, and only covered drivers may be in its pool (the random testing rule).

Where do the numbers come from? FMCSA sets the rate for each calendar year from the test results carriers report. It changes the rate only when those results call for it. Then it publishes the new rate in the Federal Register. The new rate starts on January 1 of the next year (the random testing rule). The drug rate was cut to 25 percent for 2016 (FMCSA’s 2015 notice). The last change was published on December 27, 2019. It raised the drug rate back to 50 percent, starting January 1, 2020 (FMCSA’s 2019 notice). We searched the Federal Register on September 22, 2026. We found no FMCSA notice that changes either rate for 2026, and none yet for 2027. So a page that still says 25 percent for drugs is out of date. The last two changes were both published in late December, so check again each January. DOT’s drug and alcohol office lists each year’s rates on its website, but that page refused our tools, so we could not read it.

Owners often type “do owner operators get random drug tested” into a search box. The answer is yes. An owner-operator with his own authority is both the employer and the driver, so he follows the rules for both. His random program must have “two or more covered employees in the random testing selection pool” (the rule for a company with one driver). Nobody can draw his own name by chance from a list of one. So he joins a consortium, and FMCSA’s guidance says he must (FMCSA’s guidance from 1997). An owner-operator leased on to your authority is different. Your lease gives you control of his truck, so FMCSA treats him as under your control for drug and alcohol testing (FMCSA’s 2001 rule). So he goes in your pool.

Two more things the rule asks for. The tests must be “unannounced”, and the test dates must be spread reasonably through the year. And every driver has the same chance at every draw (the random testing rule). So a driver tested in March can be picked again in June.

On Monday, September 21, 2026, the consortium’s email arrives. Two of your drivers are picked for this quarter. Alex is picked for a drug test and an alcohol test. Sam is picked for a drug test. The quarter ends on Wednesday, September 30. Alex is on a load two States from home. Sam is on vacation until Monday, September 28.

Chapter 02

How long does a driver have to take a random drug test?

The rules give no number of hours. Once you tell a driver he is picked, he must go “to the test site immediately” (the random testing rule). There is one qualification. If he is doing other work on duty when you tell him, such as loading, he stops and goes “as soon as possible”. That qualification does not cover driving. The DOT testing rules add one more line. A driver who does not appear “within a reasonable time, as determined by the employer” has refused (the rule on refusing a drug test). So you set the time, it must fit the word “immediately”, and you tell him only when he can go at once.

Start with Alex. “Unannounced” means you do not warn him. You do not call him on Monday night to say a test is coming. Instead, you plan the moment you will tell him. He delivers on Tuesday morning at a warehouse two States from home. You ask the consortium for a collection site near that warehouse. Not every clinic does a breath alcohol test, so you ask for one that does both tests. The consortium books a clinic 12 miles from the warehouse.

The alcohol test has one more limit. A driver may be tested for alcohol only while he is working, just before he starts, or just after he stops (the random testing rule). So you could not send Alex for the breath test on his day off. On Tuesday, right after he unloads, he is still on duty. That is the moment.

At 9:10 a.m. the dock releases him, and you call him right then. You tell him he is picked, that he must go now, and where. He takes his CDL with him, because the collector must see a photo ID (the rules for the collection). You also tell the clinic to expect him within 40 minutes. That time is your own choice, not a number from the rules. If he is late, the collector calls the person at your company who handles testing. The rules call that person the designated employer representative, or DER. In your company, that is you, and you decide whether he refused.

Alex drives straight there. At the clinic, the breath test usually comes first, then the urine collection (the rules for the collection). The breath result is ready at once, and it is negative. The drug result takes longer. A lab tests the sample, and then a doctor called the medical review officer, or MRO, checks the result before you get it. Who does what in a testing program is explained in our guide to DOT drug testing. On Thursday, the MRO reports Alex’s drug test as negative.

Chapter 03

What if a picked driver is away, or does not go?

A picked driver must still be tested. The rule says each one “shall be tested during the selection period” (the random testing rule). In your case, that period is the quarter. You may not skip a busy driver and test the next name instead. FMCSA said that when it wrote this line in 2001. It said a driver missing his period must be “the exception, and not the normal practice” (FMCSA’s 2001 rule). So a driver on a short vacation is tested when he comes back. A driver who is told and does not go has refused the test.

Now Sam. He is back on Monday, September 28, two days before the quarter ends. You do not call him on vacation to say a test is waiting, because that would warn him. On Monday morning, when he comes in to start his shift, you tell him. He goes straight to the clinic near your yard, and his drug test is done inside the quarter. Had Sam also been picked for alcohol, the timing would still work. He is just about to start work, and that is one of the allowed moments.

Now say Sam’s vacation lasted until October 12. The quarter would end before he could be tested. The rule itself gives no answer here. FMCSA’s written guidance comes closest, in an answer about school bus drivers off for the summer. It lets the employer put the name back and draw another. Or the employer can hold the name and test the driver on his return. That works if he is back before the next draw (FMCSA’s guidance from 1997). Ask your consortium in writing how it handles this. Then write down why Sam was not tested, with his dates. And keep Sam in the pool. The same guidance says a driver off for a layoff, illness, injury or vacation stays in, as long as you expect him back.

The harder case is a driver who does not go. Say Alex had answered, “I’m tired, I’ll go tomorrow.” Remember the rule on time. A driver who does not appear “within a reasonable time, as determined by the employer” has refused (the rule on refusing a drug test). The alcohol test has the same rule (the rule on refusing an alcohol test). Deciding whether he refused is your job. You cannot hand it to the consortium (the rules for testing companies). There is one exception. When a consortium calls a lone owner-operator for a test and he does not show up, the consortium decides. Leaving the clinic before the test is finished can be a refusal too.

A refusal breaks the drug and alcohol rules, much like a positive test. You must take the driver off driving and all other work on duty at once (the refusal rule). You must report the refusal to the Clearinghouse by the end of the third business day (the Clearinghouse reporting rule). How to do that is in our guide to Clearinghouse queries. He may not drive again until he finishes the return to duty process, told in our guide to return to duty. This is why the time you give a driver should be set before you call, and written down.

Chapter 04

Who belongs in the pool, and what do I keep on file?

Every driver who needs a CDL to drive for you belongs in the pool, and nobody else does (the random testing rule). Add a new driver when he starts, and take a driver out when he leaves. A driver who is off for a while stays in. Then keep the papers of each draw. Keep the selection list for at least 2 years and negative results for 1 year. Keep refusals and positive results for 5 years (the records rule).

Look at the pool list with the consortium’s email in hand. On that Monday, the list contains two errors. Mike quit on September 10, and his name is still on it. Dan started on September 15, and his name is not. The rule says “all covered drivers must be in the random pool”. It also says that only covered drivers may be in it (the random testing rule). So you email the consortium that morning. Take Mike out. Add Dan, with his start date. Dan’s drug test before hiring came back negative before his first load, so he is ready for the next draw. The checks a new driver needs before his first load are in our guide to hiring checks.

Three more cases come up in small fleets. Say you hold a CDL yourself and take a load now and then. Then you are in the pool too. FMCSA’s guidance says such a driver “must be in a random testing pool at all times” (FMCSA’s guidance from 1997). A driver who also drives for another carrier goes in both carriers’ pools. And a driver you used only now and then can come out, once you no longer expect to use him.

Then build the file for the quarter. The records rule lists “documents relating to the random selection process” among the papers you must keep (the records rule). Put in the consortium’s email with the date of the draw and the names picked. Add a note of when you told each driver, who told him and where he went. Add your copies of the test forms and the results as they arrive. Add the note about any driver who was not tested, with the reason and the dates. Keep your agreement with the consortium too, because the rule lists it.

How long? The selection papers count as collection records, kept at least 2 years. Negative results are kept at least 1 year. Refusals and positive results are kept at least 5 years. When FMCSA asks, you must show these records at your main office within two business days (the records rule). Each January, ask the consortium to show you, in writing, the rates it tested at the year before. The rule makes you answer for those rates, not the consortium.

This file matters most in a new entrant audit. Having no random testing program is one of the 16 reasons a new carrier fails the audit at once. So is letting a driver who refused a test keep driving (the audit failure rule). The full list is in our guide to automatic audit failures.

There are limits to what we could check. FMCSA’s own web pages on random testing refused our tools. So this page rests on the rule text, the Federal Register and FMCSA’s guidance as printed there. We could not read DOT’s page of 2026 rates either. We could only confirm that FMCSA published no change.

We can help you keep the pool list, each quarter’s file and your records in order all year: here is what it costs.