Search for a "DUI lawyer" in Dallas and you'll actually be hiring a DWI lawyer — because in Texas law, DUI and DWI are two different charges with different defendants, standards, and penalties. Here's the distinction that matters.
DWI: the adult charge
Under Texas Penal Code § 49.04, Driving While Intoxicated applies to anyone operating a motor vehicle in a public place while:
- Having a blood alcohol concentration (BAC) of 0.08 or higher, or
- Having lost the normal use of mental or physical faculties due to alcohol, drugs, or any other substance — including prescription medication.
Note the second prong: you can be charged with DWI below 0.08 if the officer's observations support impairment. Commercial drivers face a stricter 0.04 limit when operating a commercial vehicle.
DUI: the under-21 charge
Driving Under the Influence under the Alcoholic Beverage Code § 106.041 applies only to minors (under 21) who operate a vehicle with any detectable amount of alcohol — Texas's zero-tolerance rule. It's a Class C misdemeanor: fine up to $500, no jail, but a license suspension and a record. Details on our underage DUI page.
Side by side
| DWI | DUI | |
|---|---|---|
| Applies to | Any driver | Drivers under 21 |
| Standard | BAC 0.08+ or impaired faculties | Any detectable alcohol |
| First-offense level | Class B misdemeanor | Class C misdemeanor |
| Jail (1st) | 72 hrs–180 days | None |
| Fine (1st) | $2,000 + $3,000 state fine | Up to $500 |
| License suspension (1st) | 90 days–1 year | 60 days |
Why the distinction matters for your defense
Because the elements differ, the defenses differ. DWI cases turn on intoxication evidence — tests, observations, procedures. DUI cases turn on whether any alcohol was detectable and how it was detected. And a minor can be charged with either — or both — depending on their BAC.
Whatever the charge on your paperwork says, the 15-day ALR deadline applies to both. Don't let terminology slow you down.
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