DUI with a CDL: what commercial drivers need to know
For commercial drivers, a DUI is a career problem as well as a legal one. Federal rules apply on top of your state's law.
Updated October 2026 · Sources are linked in the text · General information, not legal advice.
The federal rules (49 CFR §383.51)
| Offense (first conviction) | CDL disqualification |
|---|---|
| Driving a commercial motor vehicle with a BAC of 0.04 or more | 1 year |
| Driving under the influence in your personal vehicle (if you hold a CDL or CLP) | 1 year |
| Refusing an alcohol test (implied consent) | 1 year |
Source: 49 CFR §383.51 (CDL disqualifications).
Charged with a DUI?Deadlines start at arrest. Get a free case review from a local DUI attorney.
What to do
- Don't miss the state license hearing deadline. See deadlines by state.
- Check your employer's reporting rules.
- Talk to a DUI lawyer who handles CDL cases about how any plea would affect your CDL.
Quick answers
Does a DUI in my own car affect my CDL?
Yes. Under 49 CFR §383.51, a first DUI conviction in a non-commercial vehicle disqualifies a CDL or CLP holder for 1 year (49 CFR §383.51 (CDL disqualifications)).