DUI vs. DWI in Texas: The Key Distinction

In Texas, DUI and DWI are two different offenses — and confusing them is the most common mistake people make when researching a charge.

  • DUI (Driving Under the Influence) is Texas's zero-tolerance offense for minors under 21. A driver under 21 can be charged with DUI for operating a vehicle with any detectable amount of alcohol — even a 0.01 BAC. It's a Class C misdemeanor: a fine up to $500, a license suspension, an alcohol awareness class, and community service, but no jail time.
  • DWI (Driving While Intoxicated) is the standard drunk- or drugged-driving offense for drivers of any age. It applies when a driver has a BAC of 0.08 or higher, or has lost the normal use of mental or physical faculties due to alcohol, drugs, or any other substance. A first offense is a Class B misdemeanor with jail exposure — and penalties escalate sharply from there.

So: most adults arrested for impaired driving in Texas face a DWI, not a DUI. A minor can be charged with either — DUI for trace alcohol, or a full adult DWI if their BAC is 0.08+ or they're impaired. The questions below are organized by topic.