Mississippi holds commercial drivers to a .04 blood alcohol standard in a commercial vehicle, half the limit that applies to everyone else. One DUI disqualifies your CDL for a full year, even if you were off duty in your own truck. There is no hardship license and no interlock option for the CDL itself, and a second violation is a lifetime disqualification. If your license pays your bills, talk to a lawyer before you make a single decision in the case.
A commercial driver in Mississippi commits DUI at .04 in a commercial vehicle under § 63-11-30(1)(d)(iii) and § 63-1-216. A first violation, which includes a DUI conviction in your personal car, a test refusal, or an administrative suspension, disqualifies the CDL for one year. Hauling placarded hazardous materials makes it three years. A second violation means a lifetime disqualification. CDL holders also lose the escape hatches other drivers get: no non-adjudication, no first-offense expungement, and no interlock or hardship option for the commercial license.
- .04 BAC in a commercial vehicle, .08 in a personal vehicle, disqualification either way
- Any detectable alcohol in a commercial vehicle means 24 hours out of service
- 1-year CDL disqualification for a first violation, 3 years with placarded hazmat
- Lifetime disqualification for a second violation, reducible to no less than 10 years
- No non-adjudication and no first-offense expungement for CDL holders
Defending the Drivers Who Keep the Pine Belt Moving
Hattiesburg sits at the crossroads of I-59, Highway 49, and Highway 98. Freight moves through here all day, every day, and the men and women hauling it hold licenses that took years to earn. A DUI charge threatens that license faster and harder than almost any other legal problem a driver can have.
We sit down with drivers at our office on Corinne Street and lay out the whole picture: the criminal charge, the license suspension, and the CDL disqualification, which are three separate fights. Then we get to work on all three. The stakes are higher for you than for other drivers, so the defense has to start earlier and dig deeper.
Two Limits, One License
Commercial drivers live under a stricter set of numbers than everyone else on the road. Here is how the limits stack up under Mississippi law.
Under § 63-11-30(1)(d)(iii), operating a commercial vehicle at .04 or more is DUI, period. That is half the standard limit. Two beers with dinner can put a driver close to .04.
Off the clock, the regular .08 limit applies. But do not let that comfort you. A DUI conviction in your own pickup still disqualifies the CDL for one year under § 63-1-216. The state does not care which seat you were in.
Under § 63-1-224, any detectable amount of alcohol in a commercial vehicle, or a refusal to test, puts you out of service for 24 hours on the spot. No charge needed. Your load sits, and your dispatcher finds out.
How a CDL Gets Disqualified
Section 63-1-216 lists the triggers. Notice how many of them do not require a conviction at .08 in a truck.
The core violation. Blow .04 or more behind the wheel of a commercial motor vehicle and the first-violation disqualification is one year.
A DUI conviction in your personal car counts as a first violation. Same one-year disqualification as if you had been in the truck.
A refusal is itself a disqualifying violation. You do not avoid the CDL consequence by declining the breath test. Refusal brings its own regular-license suspension too.
An administrative license suspension under § 63-11-23 also disqualifies the CDL. The paperwork side of a DUI arrest can cost you the commercial license even while the criminal case is still pending.
If the violation happens while you are hauling placarded hazardous materials, the first-violation disqualification jumps from one year to three.
A second violation disqualifies you for life. The rules may allow a reduction after a long period, but to not less than 10 years. As a practical matter, a second violation ends most driving careers.
No Hardship License. No Interlock Shortcut.
Regular drivers who get a DUI can often keep driving legally with an ignition interlock restricted license under § 63-11-31. Commercial drivers cannot do the same for the CDL. There is no interlock option and no hardship permit that restores commercial driving privileges during a disqualification. Under § 63-11-30(5)(c), interlock relief applies only after the CDL disqualification has fully run.
The statute does give a disqualified driver one narrow move: under § 63-1-216(1)(f), you may surrender the CDL and apply for a regular license. That can keep you legal in a personal vehicle for everyday life, but it does not shorten the disqualification, and any suspension on your regular driving privilege still applies. Nothing about that process gets you back in a truck early.
Less Room for Error Than Anyone Else
Mississippi gives many first-time DUI defendants two ways to protect their record. Non-adjudication under § 63-11-30(14) lets a court withhold a conviction, and first-offense expungement under § 63-11-30(13) can clear the record years later. CDL holders get neither. If you held a commercial license at the time of the offense, both doors are closed by statute.
On top of that, § 63-11-39 forbids courts and prosecutors from reducing a DUI to a lesser charge. There is no plea down to reckless driving in Mississippi. For a commercial driver, the case is win or wear it. That is why we investigate the stop, the field tests, the machine, and the paperwork in every CDL case we take.
Why the First 30 Days Matter
If you failed the test, the officer took your license and handed you a receipt that works as a 30-day temporary permit under § 63-11-23. Requesting a trial within those 30 days can extend the permit until the case is decided. If you refused, the suspension takes effect 30 days after notice. Either way, the clock started the night of the arrest. Drivers running I-59, Highway 49, and Highway 98 through the Pine Belt call us because we move on these deadlines immediately, before options quietly expire.
Start with our DUI defense overview to see how we fight these cases. If this is your first charge, read about first-offense DUI in Mississippi. For the license side of the fight, see our pages on DUI license suspension and breath test refusal.
Your CDL DUI Defense Team
Related DUI Defense Resources
How we challenge the stop, the field tests, and the Intoxilyzer in Hattiesburg and across South Mississippi.
The deadlines, permits, and interlock rules that decide whether you keep driving while your case is pending.
What a refusal costs under Mississippi's implied consent law, and how refusal cases get defended.
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Frequently Asked Questions About CDL DUI in Mississippi
I got a DUI in my personal car. Do I lose my CDL?
Yes. Under Mississippi Code § 63-1-216, a DUI conviction in any vehicle disqualifies your CDL for one year, even if you were off duty and driving your own car. The .04 limit only applies inside a commercial vehicle, but the one-year disqualification follows a DUI in any vehicle.
What BAC applies to truck drivers in Mississippi?
In a commercial vehicle, the per se limit is .04 under Mississippi Code § 63-11-30(1)(d)(iii). In your personal vehicle, the regular .08 limit applies. And under § 63-1-224, any detectable amount of alcohol while operating a commercial vehicle puts you out of service for 24 hours on the spot.
Can I get a work permit or hardship license for my CDL?
No. Mississippi has no hardship license and no interlock-restricted option for the CDL itself. An ignition interlock can restore regular driving privileges, but it does not restore commercial privileges until the full disqualification period has run. In the meantime, the law lets you surrender the CDL and apply for a regular license.
What if I refused the breath test?
Refusal is its own problem. A test refusal disqualifies your CDL for one year, the same as a conviction. It also triggers a separate suspension of your regular license, 90 days with no prior or one year with a prior, and under § 63-11-41 the refusal can be used against you in the criminal case.
Is a second DUI really a lifetime CDL ban?
Yes. A second violation brings a lifetime disqualification under § 63-1-216. The rules may allow a reduction after a long period, but to not less than 10 years. For a working driver, a second offense usually ends the career.
Can I get non-adjudication as a CDL holder?
No. Mississippi's non-adjudication law, § 63-11-30(14), is not available to anyone who held a CDL at the time of the offense. The same goes for first-offense DUI expungement under § 63-11-30(13). A CDL case has to be won on the front end, before there is a conviction on the record.