How a DUI Affects Your Commercial Driver’s License (CDL) in California

July 28, 2025

How a DUI Affects Your Commercial Driver’s License (CDL) in California

If you hold a Commercial Driver’s License (CDL) in California, a DUI conviction can severely impact your ability to work and earn a living. Commercial drivers are held to higher standards than non-commercial drivers, both in terms of legal blood alcohol content (BAC) limits and penalties. At Thelander Law, we understand the serious consequences that come with a DUI and can provide legal assistance to help protect your livelihood.


CDL Holders Face Stricter DUI Rules


Under California Vehicle Code §23152(d), commercial drivers can be charged with a DUI if they operate a commercial vehicle with a BAC of 0.04% or higher—half the legal limit for regular drivers. Even if you're off-duty and driving your personal vehicle, a DUI conviction still affects your CDL.


First DUI Offense and CDL Consequences


If you are convicted of a first-time DUI in California, your CDL will be disqualified for one year, regardless of whether the offense occurred in your commercial or personal vehicle. During this time, you are prohibited from driving any commercial motor vehicle, which can be devastating for anyone who relies on their CDL for employment.


In addition to the CDL disqualification, you may also face:


  • Criminal penalties (jail time, fines, probation)
  • Mandatory DUI education programs
  • License suspension for your standard Class C license


Second DUI or Refusal to Test


A second DUI offense or refusal to take a chemical test can result in a lifetime disqualification of your CDL. This essentially ends your commercial driving career unless certain reinstatement conditions are met after a 10-year period.


DUI Arrests Without Conviction


Even if you are arrested for DUI and not convicted, the California Department of Motor Vehicles (DMV) can still impose administrative penalties that impact your CDL. This includes a possible suspension if you fail a chemical test or refuse to take one.


DUI and Employment Consequences


Most employers in the commercial driving industry have zero-tolerance policies for DUIs. A conviction may lead to immediate termination or make it difficult to find another driving job. It may also affect your eligibility for insurance coverage, which is essential in many driving roles.


How Thelander Law Can Help


At Thelander Law, we can provide legal assistance to help you:


  • Fight the DUI charges in court
  • Request a DMV hearing to challenge your license suspension
  • Explore eligibility for a restricted license
  • Seek the most favorable outcome to protect your record and your CDL


A DUI is always serious, but the consequences are especially harsh for commercial drivers. Don’t face it alone—reach out to Thelander Law to discuss your legal options.

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