Last reviewed Oct 26, 2026. General information, not legal advice.
Employers often ask us which test to order. The short answer: if the job is covered by DOT rules, the test must be a DOT test. If it is not, the employer sets the rules in its own policy.
The main differences
| Question | DOT test | Non-DOT test |
|---|---|---|
| Who decides the rules | Federal rules | The employer’s policy |
| What is tested | Set by federal rules | The employer picks (for example, 5-panel or 10-panel) |
| Sample type | Urine | Urine, hair or others, by policy |
| Paperwork | Federal custody and control form | Lab’s own form |
Why the difference matters
A DOT test has to follow every federal step. A small mistake in the paperwork can make a test unusable. That is why DOT collections follow a strict checklist.
Employers also cannot mix the two. A DOT test is used for DOT purposes, and a company-policy test is used for company purposes.
Which one do I need?
- You drive a truck or bus with a CDL for work: most likely a DOT test.
- Your employer has its own drug-free workplace policy: most likely a non-DOT test.
- Not sure? Ask your employer which test they ordered, or bring their paperwork. We can help sort it out.
Next steps
Learn about our DOT drug testing, non-DOT drug testing and hair testing, or read what a DOT drug test is.