Wisconsin OWI/DUI defense

CDL Holders and OWI/DUI in Wisconsin: Career-Ending If Unaddressed

Federal Motor Carrier Safety Regulations (49 CFR §383.51) and Wisconsin Statute §343.315 impose a separate penalty layer on CDL holders convicted of OWI. A first OWI triggers a mandatory 1-year commercial driving disqualification, even if you were driving your personal vehicle. A second OWI means lifetime disqualification. For professional drivers, an OWI is not just a legal problem. It is a career emergency.

Last reviewed 2026-04-15 by Cafferty & Scheidegger, S.C. · Free 24/7 consultations · Hablamos español

Cafferty & Scheidegger OWI/DUI defense attorneys serving southeast Wisconsin
Best Law Office in Racine 2025 | Cafferty & Scheidegger OWI/DUI defense

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Racine 2025

4.9

Client Rating

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30+

Years Defending

Southeast Wisconsin

3

Counties Covered

Racine · Kenosha · Walworth

Why CDL holders face a separate penalty track

CDL regulations exist at the federal level (FMCSA) and are implemented in Wisconsin through §343.315. These penalties are in addition to the standard OWI penalties. You cannot avoid them through plea bargaining in state court. They are administrative consequences that attach to the CDL itself.

Critically, the CDL disqualification applies regardless of whether you were driving a commercial vehicle at the time. An OWI in your personal car on a Saturday night disqualifies your CDL on Monday morning.

Lower BAC threshold: While operating a commercial motor vehicle, the legal limit is .04, not .08. You can be charged under §346.63(5)(a) at half the standard limit.

CDL disqualification penalties

Offense Disqualification Notes
1st OWI (any vehicle) 1 year 3 years if driving a CMV hauling hazmat
1st refusal (any vehicle) 1 year Same as conviction; refusal counts
2nd OWI or refusal (any vehicle) Lifetime May apply for reinstatement after 10 years
OWI causing death (CMV) Lifetime (no reinstatement) Permanent bar from commercial driving

The “masking” prohibition

Federal regulations prohibit masking: reducing a CDL holder’s OWI to a lesser offense (like reckless driving) to avoid the disqualification. Wisconsin Statute §343.315(2)(h) implements this federal requirement. Even if a state-court plea deal drops the OWI charge, the DOT may still impose the disqualification based on the underlying facts.

This doesn’t mean defense is futile. It means the defense strategy must be different. Dismissals and acquittals (not plea reductions) are the path that protects the CDL.

Defense strategies for CDL holders

Aggressive suppression

Because plea bargaining is largely neutered by the masking prohibition, CDL-holder defense is inherently more adversarial. We focus on motions to suppress the stop, the arrest, and the chemical test. If the evidence is excluded, the case is dismissed. The CDL is preserved.

BAC precision at .04

At the .04 CMV threshold, instrument precision matters even more than in standard OWI cases. A .001 margin of error can be the difference between a valid and invalid result. We subpoena calibration logs, operator certifications, and maintenance records for the specific instrument used.

Challenging the “operating” element

Wisconsin case law defines “operating” more broadly than many CDL holders expect. But the state must still prove you were operating or had operated the vehicle. Sitting in a parked truck with the engine running for heat, sleeping in the cab, or being found near (but not in) the vehicle all present factual disputes we can exploit.

Protecting reinstatement eligibility

If a conviction is unavoidable, the focus shifts to preserving future CDL reinstatement. After a lifetime disqualification, federal rules allow reinstatement application after 10 years, but only if the driver has complied with all conditions, completed treatment, and demonstrated rehabilitation. We document compliance from day one to build the reinstatement case years in advance.

Employer and financial consequences

Your CDL is your livelihood. If you hold a CDL and have been arrested for OWI, in any vehicle, call (262) 632-5000 immediately. Time is critical for both the OWI case and the refusal hearing deadline. We serve Racine, Kenosha, and Walworth counties.

Frequently asked questions

Can I lose my CDL for a DUI or OWI in my personal vehicle?
Yes. Under federal FMCSA regulations (49 CFR §383.51) and Wisconsin Statute §343.315, a CDL disqualification is triggered by any OWI conviction, regardless of whether you were driving a commercial vehicle or your personal car. A first offense means a 1-year disqualification (3 years if hauling hazmat). A second means lifetime disqualification.
What is the BAC limit for CDL holders in Wisconsin?
When operating a commercial motor vehicle, the legal limit is .04, half the standard .08 threshold. At this lower threshold, instrument precision and calibration become even more critical. A .001 margin of error can be the difference between a valid and invalid result.
Can a plea bargain to reckless driving protect my CDL?
No. Federal masking regulations prohibit reducing a CDL holder's OWI to a lesser offense to avoid disqualification. Even if state court drops the OWI charge, the DOT may still impose the CDL disqualification based on the underlying facts. Only a full dismissal or acquittal protects the CDL, which is why CDL defense strategy is inherently more adversarial.
Does a refusal to submit to the chemical test disqualify my CDL?
Yes — separately from any OWI conviction. Under 49 CFR §383.51(b), a test refusal is itself a disqualifying offense for CDL purposes. A first refusal means a 1-year CDL disqualification (3 years with hazmat), and a second refusal is a lifetime disqualification. The disqualification runs whether or not the underlying OWI case ever results in a conviction. The 10-day window to request a Wisconsin refusal hearing under §343.305(9) is therefore even more critical for CDL holders.
Will my employer find out about my OWI before I tell them?
Likely yes. Under 49 CFR §383.31, CDL holders must self-notify their employer of any traffic conviction (other than parking) within 30 days — and any license suspension, revocation, or disqualification within one business day. Your employer also runs annual MVR pulls and periodic DAC Services reports that surface the conviction independently. Non-notification is itself a ground for CDL discipline. Coordinate the employer conversation with your attorney before the 30-day deadline runs.

Your defense team

Every case is worked directly by a named attorney from first call through final disposition. You will never be handed off to a paralegal or rotated through associates. Your attorney knows your case because they built it.

Patrick K. Cafferty, founding partner and OWI/DUI defense attorney in Racine, Wisconsin

Patrick K. Cafferty

Founding Partner

Marquette Law graduate defending OWI and criminal cases across southeast Wisconsin for over 32 years. Named a Wisconsin Super Lawyer® 18 consecutive years and rated AV Preeminent® by Martindale-Hubbell.

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Jillian J. Scheidegger, partner handling OWI/DUI and criminal defense across southeast Wisconsin

Jillian J. Scheidegger

Partner

Partner since 2013 handling criminal defense and OWI matters for adults and juveniles. Marquette Law graduate, Wisconsin Super Lawyer®, and President-Elect of the Racine County Bar Association.

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Carl Johnson, OWI/DUI trial attorney practicing in Racine, Kenosha, and Walworth counties

Carl Johnson

Attorney

Marquette Law 2006, UW–Madison undergrad. Extensive trial experience including first-degree homicide and sexual assault defense. Racine native practicing in Racine, Kenosha, and Walworth counties.

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Juan S. Ramirez, bilingual OWI/DUI defense attorney and former public defender

Juan S. Ramirez

Attorney

Michigan State Law graduate and former Racine County Public Defender. Bilingual English/Spanish. Won the WACDL Hanson Memorial Advocate Prize for a homicide acquittal. Advises on how criminal charges affect immigration status.

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Beyond OWI: the full practice

Cafferty & Scheidegger is a full-service criminal defense firm. This microsite covers OWI specifically; for the larger practice, case results, attorney bios, and all other practice areas, visit the main site.