DOT drug and alcohol testing for a new carrier or owner-operator

Checked against official sources · Last reviewed October 6, 2026

If your drivers need a CDL, your company needs a DOT drug and alcohol testing program under 49 CFR Part 382, in place on the day you begin operating. A new carrier with no testing program, or no random testing program, automatically fails its new entrant safety audit. [1][2][4]

Who's covered

Part 382 testing applies to drivers who operate a commercial motor vehicle in commerce and need a CDL, and to their employers.

An owner-operator who drives for his or her own company has to meet both the employer rules and the driver rules. [2]

When the program must start

A U.S. carrier must have its testing program in place on the date it begins commercial motor vehicle operations. Not having a testing program, or not having a random testing program, is an automatic failure of the new entrant safety audit. [1][4]

Pre-employment testing

Before a driver first performs safety-sensitive functions, the driver must take a pre-employment drug test, and you must have a verified negative result from the MRO or C/TPA.

A pre-employment alcohol test is optional. If you choose to do one, you must test every covered employee the same way.

You can skip the pre-employment drug test only under narrow conditions: the driver was in a compliant testing program within the last 30 days, was tested in the last 6 months or was in a random program for the last 12 months, and no prior employer you know of has a record of a violation in the last 6 months. You must contact the driver's testing program and get and keep the information that verifies this. [6]

Random testing rates for 2026

FMCSA sets minimum yearly random testing rates as a percentage of the average number of driver positions. The 2026 rates are unchanged since 2020.

When FMCSA changes a rate, it publishes the new rate in the Federal Register, and the change applies from January 1 of the next calendar year.

Sources: [3][7]

How random selection works

Random selection must use a scientifically valid method and give every driver an equal chance each time selections are made. Tests must be unannounced and spread reasonably through the year.

You may use a C/TPA to make the random selections, and your drivers may be part of a larger pool. You are still responsible for making sure the right rate is tested and that only covered employees are in the pool. [7]

Owner-operators: joining a consortium

An owner-operator who employs only himself or herself must run random testing through a selection pool of two or more covered employees.

FMCSA's Clearinghouse also says every owner-operator must work with a C/TPA to manage its drug and alcohol testing program. [2][8]

Supervisor training

Anyone who supervises drivers needs at least 60 minutes of training on alcohol misuse and another 60 minutes on drug use, so they can make reasonable-suspicion decisions. Refresher training is not required. [9]

The Clearinghouse check

Testing goes hand in hand with the FMCSA Drug and Alcohol Clearinghouse. Before a new driver performs any safety-sensitive function, you must also run a full pre-employment query in the Clearinghouse, and you must query every driver at least once a year. [10]

Common questions