CDL DUI in Florida — Commercial Driver Defense

A DUI charge is career-ending for a commercial driver — not because of fines or jail time, but because of what it does to your CDL. Under Florida Statute § 322.61 and federal FMCSA regulations (49 C.F.R. § 383.51), CDL holders are held to a BAC threshold of .04 in a commercial vehicle — half the standard .08 limit. A first DUI conviction (in any vehicle, commercial or personal) results in a 1-year CDL disqualification. A second DUI results in lifetime CDL disqualification. A CDL holder cannot obtain a hardship license for CDL privileges during any disqualification period. If you hold a CDL and you are facing a DUI charge, the stakes are your livelihood — not just your record.

Legally reviewed by Tonmiel Rodriguez, Board Certified Criminal Trial Lawyer — last reviewed June 2026.

What BAC Limit Applies to CDL Holders in Florida?

Under § 322.61, Florida CDL holders are subject to a .04 BAC limit when operating a commercial motor vehicle — exactly half of the standard .08 limit applicable to non-commercial drivers. This means a CDL driver can be charged with DUI in a commercial vehicle at a BAC that would be completely legal for a regular driver. The .04 limit applies only when the driver is operating a commercial motor vehicle. When driving a personal (non-commercial) vehicle, the standard .08 limit applies. However — and this is the critical point — a DUI conviction in a personal vehicle still triggers CDL disqualification under Florida law. Your CDL is at risk whether the DUI occurred in your truck or in your personal car.

What Happens to Your CDL After a First DUI in Florida?

A first DUI conviction results in a mandatory 1-year disqualification from operating a commercial motor vehicle under § 322.61(1)(a) and 49 C.F.R. § 383.51(b). This applies regardless of whether the DUI occurred in a commercial or personal vehicle. If the DUI involved transporting hazardous materials (a placard-required load), the disqualification period is 3 years for a first offense under federal regulations. During the CDL disqualification period, you cannot obtain a CDL hardship license or any restricted CDL — there is no equivalent of the DHSMV Business Purposes Only license that applies to CDL driving privileges. Your non-CDL driving privileges may be eligible for a standard hardship license, but that hardship license does not restore any CDL operating authority.

What Happens to Your CDL After a Second DUI in Florida?

A second DUI conviction results in lifetime CDL disqualification under § 322.61(1)(b) and 49 C.F.R. § 383.51(b)(9). There is no rehabilitation period, no hardship exception, and no reinstatement process for a lifetime CDL disqualification. A second DUI conviction for a commercial driver is the permanent end of any career requiring a CDL — trucking, bus driving, hazmat transport, or any other commercial driving occupation. For a CDL driver, this means a second DUI charge must be approached with maximum aggression at every stage of the defense, because the consequences of conviction are irreversible.

What FMCSA Regulations Apply to CDL DUI in Florida?

Federal Motor Carrier Safety Administration (FMCSA) regulations at 49 C.F.R. § 383.51 establish the CDL disqualification standards that all states must apply. Key provisions:

• Operating a CMV with BAC .04 or higher: First offense — 1-year CDL disqualification. Second offense — lifetime disqualification.
• Driving under the influence of alcohol (any vehicle): First offense — 1-year CDL disqualification. Second offense — lifetime disqualification.
• Refusal to take an alcohol test (any vehicle): Treated the same as a DUI conviction for CDL disqualification purposes.
• Leaving the scene of an accident involving a CMV: First offense — 1-year CDL disqualification.
• Using a CMV to commit a felony involving a controlled substance: Lifetime CDL disqualification, first offense.
• Drug offenses: Any conviction for an offense that would disqualify under § 322.61 triggers CDL disqualification on the same terms as alcohol DUI.

The FMCSA’s Drug and Alcohol Clearinghouse (established January 2020) tracks positive drug/alcohol tests and refusals for CDL holders — this federal database is checked by employers before any CMV hire and is separate from the Florida driving record.

Can a CDL Driver Get a Hardship License During CDL Disqualification?

No. There is no hardship license for CDL operating privileges during a CDL disqualification period. This is explicitly established under federal law and Florida § 322.61 — the CDL disqualification is absolute. A CDL driver who loses commercial driving privileges due to a DUI conviction may still apply for a standard hardship license for non-commercial driving through DHSMV, but that hardship license authorizes only non-commercial vehicle operation. It does not restore the right to operate any commercial motor vehicle, does not authorize Class A or Class B operations, and does not satisfy any CDL-required endorsement. If your livelihood depends on your CDL, the hardship license for personal driving is cold comfort.

How Does a CDL DUI Defense Differ From a Standard DUI Defense?

The legal defenses in a CDL DUI case are the same as in any DUI case — unlawful stop, insufficient probable cause, FST administration errors, Intoxilyzer maintenance failures, rising BAC, medical conditions, Miranda violations — but the strategic stakes are different. Every DUI defense angle that could result in a dismissal, suppression of evidence, or reduction to reckless driving needs to be explored with full preparation, because even a reckless driving reduction (wet reckless) may trigger CDL disqualification consequences under some FMCSA interpretations. The administrative suspension under § 322.2615 also runs separately from the criminal case — I handle both simultaneously, because the 10-day formal review hearing window is the same for CDL holders as for any other driver, and a successful formal hearing can preserve non-commercial driving privileges during the criminal case. For a CDL holder, a first DUI is not a traffic ticket. It is a career crisis that requires a lawyer who handles both the criminal case and the administrative proceeding with equal intensity.

Does a DUI in a Personal Vehicle Disqualify Your CDL in Florida?

Yes, and this is the point that surprises most CDL drivers. Florida § 322.61 and 49 C.F.R. § 383.51 both apply CDL disqualification to “driving under the influence of alcohol” in any vehicle — not just a commercial motor vehicle. A DUI conviction from an incident that occurred in your personal pickup truck on a Saturday night results in the same 1-year CDL disqualification as a DUI in your commercial rig on a work day. The commercial driving disqualification follows the conviction, not the vehicle. A first-offense DUI in a personal vehicle where the driver has a CDL is a case that needs an aggressive defense from the first hearing, because a conviction — even a “standard” first-offense DUI — ends commercial driving for a year.

Employer Notification Requirements After a CDL DUI in Florida

Federal FMCSA regulations under 49 C.F.R. § 383.31 require a CDL driver who is convicted of DUI — in any vehicle, commercial or personal — to notify both the licensing state and their employer within 30 days of the conviction. The employer must then conduct a background check on the driver’s CDL record. Additionally, 49 C.F.R. § 391.25 requires motor carriers to review each CDL driver’s MVR annually. The FMCSA Drug and Alcohol Clearinghouse, mandatory since January 2020, tracks positive drug/alcohol tests, refusals, and violations — and is checked by carriers before any CMV hire and during annual renewals. A DUI conviction will appear in clearinghouse and MVR checks regardless of whether the driver voluntarily disclosed it.

Failure to notify your employer within 30 days is itself a violation of federal regulations, which can independently result in CDL disqualification and civil penalties separate from any DUI-related consequence. If you receive a DUI charge while holding a CDL, the notification obligation runs from the date of conviction, not arrest — but it is advisable to consult with an attorney before making any disclosure so you understand the full landscape.

Hazmat Endorsement Consequences After CDL DUI

CDL holders with a hazmat (H) endorsement face an additional layer of consequences after a DUI conviction. FMCSA regulations under 49 C.F.R. § 383.51(b)(2) require a 3-year CDL disqualification (rather than 1 year) for a first DUI offense when the CDL driver was transporting a placard-required quantity of hazardous materials at the time of the DUI. This enhanced disqualification period applies specifically to CMV operations involving hazmat loads — not to all CDL operations generally.

Additionally, Transportation Security Administration (TSA) security threat assessment requirements for hazmat endorsements under 49 C.F.R. § 1572 mean that a DUI conviction can independently result in denial or revocation of the hazmat endorsement as a security determination — separate from any CDL disqualification. Drivers who depend on their hazmat endorsement for employment in fuel transport, chemical delivery, or similar industries face a compounded career impact from any DUI conviction.

Career Impact by Industry — CDL DUI Consequences

The practical career consequences of a CDL DUI conviction vary by industry but are severe across the board:

• Long-haul trucking: A first DUI conviction results in 1-year disqualification. Most major carriers (Werner, Schneider, J.B. Hunt, Swift) have zero-tolerance policies and will not hire a driver with any DUI conviction within the past 3–10 years, with many carriers setting a lifetime ban. Re-entry after the disqualification period is significantly limited to smaller carriers and owner-operator arrangements.
• School bus and passenger transport: Under 49 C.F.R. § 383.51, any prior DUI within 10 years disqualifies a driver from operating vehicles designed to transport 16 or more passengers. School bus drivers must also pass background checks under Florida’s Jessica Lunsford Act — a DUI conviction triggers additional scrutiny.
• Fuel/hazmat delivery: The hazmat endorsement consequences described above, plus insurer requirements that typically exclude drivers with DUI history from fuel transport coverage, make re-employment in this sector difficult.
• Crane and heavy equipment operators: Many certifications (NCCCO, NCCER) require a clean driving record for certain equipment classes. A DUI conviction can affect certification renewal.
• Out-of-state CDL holders: Florida is a member of the Driver License Compact (DLC) — out-of-state CDL convictions from Florida are transmitted to the home state, and the home state applies its own CDL disqualification laws. An out-of-state CDL holder convicted of DUI in Florida faces CDL disqualification in their home state as well as Florida.

Related DUI Topics

• DUI in Florida — Overview
• DUI Defenses — How to Fight DUI Charges
• DUI Penalties in Florida — Complete Guide
• DUI Administrative Suspension — Polk County
• Hardship License After DUI — Florida
• DUI Reduced to Reckless Driving
• Criminal Defense — Polk County

Frequently Asked Questions — CDL DUI in Florida

What is the BAC limit for CDL holders in Florida?

Under Florida Statute § 322.61, CDL holders are subject to a .04 BAC limit when operating a commercial motor vehicle — half the standard .08 limit. In a personal (non-commercial) vehicle, the standard .08 limit applies. However, a DUI conviction in a personal vehicle still triggers CDL disqualification under § 322.61 and 49 C.F.R. § 383.51.

How long is a CDL suspended after a first DUI in Florida?

A first DUI conviction results in a mandatory 1-year CDL disqualification under § 322.61(1)(a) and 49 C.F.R. § 383.51(b). If the DUI involved transporting hazardous materials, the disqualification is 3 years for a first offense. There is no CDL hardship license during the disqualification — a standard DHSMV hardship license authorizes only non-commercial driving.

Is a second DUI a lifetime CDL disqualification in Florida?

Yes. A second DUI conviction results in lifetime CDL disqualification under § 322.61(1)(b) and 49 C.F.R. § 383.51(b)(9). There is no reinstatement process, no rehabilitation exception, and no hardship CDL available. Lifetime CDL disqualification is the permanent end of any commercial driving career.

Can a CDL driver get a hardship license for commercial driving during disqualification?

No. There is no hardship license for CDL operating privileges during a CDL disqualification period under Florida law or federal FMCSA regulations. A CDL driver may obtain a standard DHSMV hardship license for personal (non-commercial) vehicle operation, but that license does not authorize any commercial motor vehicle operation during the disqualification.

Does a DUI in a personal car disqualify a CDL in Florida?

Yes. Florida § 322.61 and 49 C.F.R. § 383.51 apply CDL disqualification to any DUI conviction — regardless of whether the DUI occurred in a commercial or personal vehicle. A Saturday-night DUI in your personal car triggers the same 1-year CDL disqualification as a DUI in your commercial truck. The conviction follows the CDL holder, not the vehicle.