How does return to duty work after a failed drug test?

Chapter 01

What do I do the day a driver fails a test or refuses?

Take him off all safety-sensitive work at once, the hour you get the result. The rules call this work “safety-sensitive functions”. It covers driving, and also waiting for a load, inspecting or servicing the truck, and loading or unloading (the definitions). Do not wait for a written report or for a lab to test his second sample. Give him a list of substance abuse professionals near him, free of charge. The violation then goes into the Clearinghouse, and his State is told. Whether you keep him after that is your choice.

Here is how that looks in real life. Say you run four trucks. On Wednesday, October 14, 2026, one of your drivers is picked for a random drug test, and he gives his sample that afternoon. We explain how drivers are selected in our guide to random testing. On Tuesday, October 20, at ten in the morning, your phone rings. It is the medical review officer, or MRO. That is the doctor who reviews the lab results of DOT drug tests (the definitions in the testing rules). The result is a verified positive for marijuana.

Your driver is at a truck stop in Indiana, 300 miles from home, with a load in the trailer. You call him at once and tell him he is off duty. He may not drive the truck, not even back to your yard. No employer who knows a driver tested positive may let him do safety-sensitive work (the rule on positive tests). DOT’s testing rules are just as plain about timing. They say: “Do not wait to receive the written report or the result of a split specimen test” (what employers do with a verified result). So even if your driver asks for his second sample to be tested, he stays off while that happens. One of your other drivers is home on his break. You send him out, and he brings the truck and the load in.

A refusal works the same way as a positive. So does an alcohol result of 0.04 or more (when a SAP is required). A refusal includes not showing up for a test when told, or leaving before it is done. So does a sample the MRO reports as tampered with or swapped (the definitions). One alcohol result is different. A breath result from 0.02 to 0.039 is not a violation. The driver stays off until his next regular shift starts, and never less than 24 hours after the test. After that he goes back to work, with no SAP (the rule on low alcohol results).

The violation must go into FMCSA’s Drug and Alcohol Clearinghouse. That is the database carriers check before they hire a driver. For a verified drug positive like yours, the MRO reports it within 2 business days (the reporting rule). You report violations that fall outside the MRO’s reporting duties. One is an alcohol result of 0.04 or more, and another is a driver who did not show up for a test. You have until the end of the third business day after you learn of it. A consortium, the company that runs testing for small carriers, can report for you, but the duty stays yours.

In the Clearinghouse, your driver now has what FMCSA calls a prohibited status. Owners often search for what that means. It means no carrier may let him drive or do other safety-sensitive work until he finishes the process (the rule on coming back). Since November 18, 2024, it also reaches his license. FMCSA tells the State that issued his CDL. That State must remove the CDL from his license and record it within 60 days of the notice (the State’s duty). His license stays, but it no longer lets him drive a truck. FMCSA set this up in a rule it published in 2021. States had to follow it from November 18, 2024 (the Clearinghouse rule for States). The same rule notes that several States already made employers report positives or refusals to the State. So check your own State’s rules as well.

This is not a small thing to get wrong. Say your company is new and has its first safety audit. If the auditor finds you used a driver you knew had tested positive, the audit fails on that alone. The same goes for a driver who refused a test (the audit failure list). The whole list is in our guide to automatic audit failures.

The same day, you send your driver a list of SAPs near him, with names, addresses and phone numbers. You must give this list to any driver with a violation, and you may not charge him for it (the rule on the SAP list). Your consortium can give you one.

Then comes the choice. The rules do not make you keep him. The rule says an employer is “not required to provide a SAP evaluation”, or the education or treatment that follows it (the employer’s choice). If you let him go, you still owe him the list. His status stays prohibited until he finishes the process with a SAP, and any carrier that checks him before hiring will see it. What your written testing policy should say about all this is in our guide to running a DOT testing program.

Your driver has worked for you for three years, and he tells you the truth about what happened. You decide to keep him, if he does everything the SAP asks. You put that in writing, and you write down who pays for what. From here on, the SAP leads.

Chapter 02

What does the substance abuse professional do, and who pays?

The substance abuse professional, or SAP, is a licensed expert trained and tested on DOT’s rules. He may be a doctor, a social worker, a psychologist or a certified addiction counselor, for example (who can be a SAP). He evaluates your driver and sends him to education or treatment. Later he checks that the driver completed the assigned program, and then he gives you a plan of follow-up tests. He works for neither side. The rules leave the bill for you and your driver to settle, and no rule sets a price or a timeline.

Your driver picks a SAP from your list. On Thursday, October 29, the SAP meets him by live video. The rules allow a meeting in person or by video, if the video carries sound and picture in real time (the SAP’s role). A SAP may provide these services only within the jurisdiction covered by his license. You can ask any SAP for proof that he is qualified, and he must show it to you (who can be a SAP).

The SAP must treat the positive test as proven. He must ignore claims that the test was wrong. He must also ignore excuses such as hemp oil, “medical marijuana”, poppy seeds or stress at work (the first evaluation). Every driver with a violation gets a plan for education, treatment or both. Education can be a drug and alcohol course, or self-help groups where someone checks attendance. Treatment can be anything from counseling to a stay in a clinic. The SAP must fit the plan to the person. He may not give everyone the same plan.

His written report comes to you, or to the person you named to receive test results. The rules call that person the designated employer representative, or DER. It must be someone who works for your company, not the consortium (the definitions). The report must come straight from the SAP, on his own letterhead, signed and dated (the rule on SAP reports). It names the violation and what your driver must do. In your case, that is a drug education course and weekly counseling. The SAP also tells the Clearinghouse the date of this first meeting, by the end of the next business day (the reporting rule).

Nobody can change that plan. Not you, not the driver, not your consortium. Neither of you may look for a second SAP to get an easier answer. If your driver gets one anyway, you may not rely on it (no second SAP). Only the same SAP can change his plan, and only on new facts, for example from the counselor (changing the evaluation). The SAP also may not send your driver to his own practice, or to anyone who pays him. There are a few exceptions, such as a public clinic (limits on referrals). And he takes no side. The rule says the SAP is “not an advocate for the employer or employee” (the SAP’s role).

Who pays? The rule says payment “is left for employers and employees to decide” (the employer’s choice). Settle it in writing before the first meeting, as you did. We could not find an official price for a SAP, a course or counseling. Each SAP and each program sets its own, so ask before your driver books.

How long does it take? Nobody can say in advance, and nobody should. In March 2026, DOT reminded SAPs that “It is never appropriate to provide employees with an estimated RTD timeline” before the first evaluation (DOT’s March 2026 notice). RTD is short for return to duty. The same notice warned about SAPs who rush the process or send drivers only to online programs. It also warned about SAPs who order the fewest follow-up tests because a consortium pushes them to. So be careful with any SAP who promises a quick or fixed date.

In your case, your driver finishes the course and goes to counseling each week. On Monday, December 7, the SAP meets him again. He gets the counselor’s report and interviews your driver (the second evaluation). He finds that your driver has done what the plan asked. His second report reaches you on Tuesday, December 8, with the plan for follow-up tests. The SAP may confirm compliance even if counseling needs to continue after the driver returns. You can then make that counseling part of your written deal with him (ongoing care). Had the SAP found that he did not comply, you could not have put him back to work (the second evaluation). The SAP also tells the Clearinghouse that your driver may now take his last test, by the end of the next business day (the reporting rule).

Chapter 03

When may my driver drive again?

Only when three things are true. The SAP’s report says he complied. He has passed a return to duty test. The drug result must be negative, and any alcohol result must be under 0.02 (the rule on the last step). And his CDL is valid on his State’s record. You report the negative result in the Clearinghouse, and that ends his prohibited status. If his State has already taken the CDL off his license, he waits until the State gives it back.

You send your driver for his return to duty test on Wednesday, December 9. The test could not happen before the SAP found that he complied (the rule on the last step). The drug test is directly observed. That means an observer of his own sex watches him give the sample. You must order it that way (the rule on observed tests). The SAP can ask for a drug test, an alcohol test or both (DOT’s March 2026 notice). Your SAP asked for both, so he also takes a breath test. It reads 0.00.

On Friday, December 11, the MRO calls: the drug test is negative. You report the negative result in the Clearinghouse that same day. You had until the end of the third business day (the reporting rule). That report ends his prohibited status. FMCSA then tells his State that he is no longer prohibited (the Clearinghouse rule for States).

Under the old rules, he could have been back in the truck that afternoon. FMCSA says so itself. Before November 18, 2024, the rules allowed a return to safety-sensitive work “immediately following a negative RTD test result” (the Clearinghouse rule for States). You may still read that a driver can drive the day his test comes back clean. That is now only half true.

Here is why. On Friday, December 4, his State finished removing the CDL from his license. The federal rule is short. A driver whose CDL was removed may not drive a truck “until the State Driver Licensing Agency reinstates the CLP or CDL privilege” (the rule on coming back). A CLP is a learner’s permit. So the Clearinghouse no longer lists him as prohibited, but he still cannot drive a truck. And you may not let him drive without a valid CDL (the employer’s CDL duty). Had he finished before the State recorded the removal, the State would have to stop the process, if its own law allows. His CDL would never have left his license (the State’s duty).

Once FMCSA tells the State he is no longer prohibited, the State must make him eligible to get the CDL back, if its law allows. Each State sets its own steps. FMCSA’s rule says a driver may face State requirements such as a fee to put the CDL back. Some States may even make him take part or all of the CDL tests again (the Clearinghouse rule for States). We could not check any State’s steps, so your driver should call his State’s licensing office as soon as he has the negative result. Yours goes in on Monday, December 14, and pays the fee. His CDL is back on his record on Wednesday, December 16.

That day, you check six things, in this order:

1. The SAP’s report that he complied, with the plan for follow-up tests, sent to you directly by the SAP.
2. The MRO’s negative result on that test, and the breath result if he had one.
3. Your own report of that negative result in the Clearinghouse. If you want to see his record there, that takes a query, and our guide to Clearinghouse queries explains which one and the consent it needs.
4. His driving record from his State, with the CDL back on his license.
5. The rest of his driver file, such as a medical card that is still current. Our guide to the DOT medical card covers that.
6. The date of his first follow-up test, which you have picked and not told him.

Even with all six, the decision is still yours. The rule says you are “not required to return an employee to safety-sensitive duties because the employee has met these conditions” (the rule on the last step). You keep your word. Your driver takes his first load on Thursday, December 17.

Chapter 04

How do follow-up tests work, and what if he leaves?

Follow-up tests are surprise tests the SAP orders for after the driver is back. There must be at least six in his first 12 months back in safety-sensitive work. The SAP can order more, and can keep them going for up to 48 more months (the rule on follow-up tests). You choose the dates, with no warning and no pattern, and every drug test is observed. Random tests do not count toward them. The plan follows him to any new carrier.

Your SAP’s plan asks for eight tests in the first 12 months, for drugs and alcohol, then four in the second year. The SAP decides how many tests there are, how often, and whether they cover drugs, alcohol or both. He does not pick the dates. You do (the rule on follow-up tests). The number is the SAP’s call alone. DOT’s notice said some SAPs order only the minimum because a consortium presses them to. So do not press for fewer tests, and do not let anyone else do it (DOT’s March 2026 notice).

Four rules shape how you run follow-up testing. First, the tests must come without warning and with no pattern in the timing (your follow-up duties). So do not put them on the first Monday of each month. Second, you must not give your driver a copy of the plan, or tell him how many tests there are or for how long (the rule on follow-up tests). Third, a random test does not count as a follow-up test, and a canceled test must be done again (your follow-up duties). If he is picked for a random test, he takes it, but it does not count toward his plan. Fourth, you may not add tests of your own on top of the SAP’s plan (the rule on follow-up tests).

Each follow-up drug test is observed, just like his last test before coming back (the rule on observed tests). If he refuses one or tests positive, that is a new violation. He goes back to the start: off duty, a SAP, and a new test before he may drive (when a SAP is required). And if a follow-up test is not done as the SAP directed, he may not keep driving (your follow-up duties).

His first follow-up test is on Tuesday, January 12, 2027. The 12 months include only time spent in safety-sensitive work. DOT’s own example is a driver laid off for four months. When he is called back, he must finish the rest of his tests in the months after that (the rule on follow-up tests).

Now say your driver leaves in April 2027, after three of his eight tests, to drive for a bigger carrier. The plan goes with him. The rule says it will “follow the employee” to later employers (the rule on follow-up tests). The new carrier learns about it when it checks his record before hiring him. The SAP must also send his reports to the new employer (the rule on SAP reports). That carrier must then make sure the other five tests of the first year happen, and the four of the second year.

Whoever employs him when he finishes the last follow-up test reports that in the Clearinghouse (the reporting rule). Keep your own file too. That means the positive result and the SAP’s reports, for at least 5 years (the record rule). For the SAP’s reports, the 5 years run from the day you got them (the rule on SAP reports).

How long does a failed drug test stay in the Clearinghouse? Carriers who check him keep seeing it until four things have all happened (when a record stops showing). The SAP has submitted the required reports. The negative result of the test before he came back has been reported. The follow-up tests have been reported as done. And 5 years have passed since the violation. For your driver, that means October 2031 at the earliest. If the follow-up tests are never finished, it stays.

Some things we could not check. FMCSA’s Clearinghouse website blocks automated checks, so we could not confirm the exact words its screens show. We found no official price for a SAP or a program, and we did not check any State’s own steps for giving a CDL back. The rules on this page are federal, and your State may add its own. If you would rather not track all this alone, we keep the SAP reports, the Clearinghouse reports and the follow-up calendar in order for you: here is what it costs.