California applies a strict zero tolerance policy to drivers under 21, and the penalties for underage DUI depend heavily on blood alcohol concentration. A driver under 21 with a BAC of just 0.01 percent can face a one year license suspension even without any sign of impairment, while a BAC of 0.08 percent or higher can result in the same criminal DUI charges an adult would face. Because California actually applies three separate underage DUI laws depending on BAC level, the consequences of a single traffic stop can range from a license suspension to a full misdemeanor or felony conviction. Here is how underage DUI penalties work in California.

California’s Three-Tier System for Underage DUI

Unlike DUI laws for drivers 21 and older, California enforces underage drinking and driving through three separate statutes, each triggered by a different blood alcohol concentration. A single traffic stop can result in charges under more than one of these laws, though a driver can typically only be convicted under one for the same incident.

Vehicle Code 23136: The Zero Tolerance Law

Under California Vehicle Code Section 23136, it is unlawful for anyone under 21 to drive with a BAC of 0.01 percent or greater. This is a civil, not criminal, offense, and it does not require any evidence of actual impairment. A trace amount of alcohol, even from something like cough syrup, can be enough to trigger a violation. BAC under this law is typically measured through a preliminary alcohol screening test, a handheld breathalyzer administered at the scene, and drivers under 21 are considered to have given implied consent to this test.

A violation of Vehicle Code 23136 is handled administratively by the DMV rather than through criminal court, but the consequences are still significant:

  • A one year suspension of driving privileges for a first violation
  • Longer suspension or revocation periods for drivers with prior alcohol-related offenses
  • The right to request a DMV hearing to contest the suspension, generally within 10 days of notice
  • A one year suspension, or longer with prior offenses, for refusing to submit to a PAS or chemical test

Vehicle Code 23140: Underage DUI at 0.05 Percent BAC

When an underage driver’s BAC reaches 0.05 percent or higher, California Vehicle Code Section 23140 applies. This offense is charged as an infraction, meaning it carries criminal consequences, though generally less severe than a misdemeanor. Typical penalties include a fine, a one year license suspension, and enrollment in a mandatory alcohol education program lasting three months or longer.

Important: A driver under 21 can be cited or charged under more than one of these laws from the same traffic stop. For example, a driver testing at 0.05 percent may face allegations under both the zero tolerance law and the 0.05 percent law, even though only one conviction will typically result from a single incident.

Vehicle Code 23152: Standard DUI Charges for Drivers Under 21

If an underage driver shows signs of actual impairment, or their BAC reaches 0.08 percent, the same standard as adult drivers, they can be charged under California Vehicle Code Section 23152, the general DUI statute that applies to drivers of any age. Unlike a zero tolerance violation, this results in criminal DUI charges and follows the same penalty structure and potential defenses that apply to an adult first offense DUI case, in addition to any driver’s license consequences specific to being under 21.

Minor in Possession of Alcohol Can Compound the Penalties

Underage drivers stopped with alcohol in the vehicle may also face a separate charge under California Business and Professions Code Section 25662, commonly known as minor in possession of alcohol. This is a misdemeanor punishable by a fine, community service, and, importantly, an additional one year driver’s license suspension under Vehicle Code Section 13202.5, which applies on top of any suspension already triggered by an underage DUI violation. Multiple violations stemming from the same incident can therefore result in overlapping or extended license consequences.

How Long an Underage DUI Stays on Record

In California, a DUI-related violation generally remains on a driver’s DMV record for 10 years from the date of the arrest or citation. The DMV refers to this record when making future decisions about license suspensions, revocations, and reinstatement eligibility, and both law enforcement and insurance companies are able to view this history as well.

Talk to a Fresno Underage DUI Attorney

Underage DUI cases often involve overlapping administrative and criminal proceedings with tight deadlines to request a DMV hearing, so acting quickly matters. The Law Office of Brian C. Andritch represents clients throughout Fresno in a full range of DUI defense matters, including cases involving DUI penalties for drivers under 21. Led by a former prosecutor, our team can review the circumstances of your case, explain your options, and help you build a strong defense. Contact us or call (559) 594-3906 today for a free consultation.

Disclaimer: This article is for informational purposes only and does not constitute legal advice. For legal guidance tailored to your specific situation, consult a licensed attorney.