DWI vs. DUI in Texas — Williamson County
Texas law treats DWI and DUI as two distinct offenses — DUI applies only to minors under 21, and it is a Class C misdemeanor for any detectable amount of alcohol. DWI applies to adults (and minors charged as adults) when impairment is the issue. Here is the critical difference.
DUI in Texas — Minor in Consumption of Alcohol While Operating (MICOA)
In Texas, Driving Under the Influence (DUI) under Tex. Transp. Code §106.041 applies exclusively to minors (persons under 21) who operate a motor vehicle in a public place while having any detectable amount of alcohol in their system. There is no BAC threshold — any detectable amount triggers DUI.
DUI is a Class C misdemeanor (maximum $500 fine, no jail time) for a first offense. Enhanced penalties apply for second and third offenses. For minors who refuse to provide a specimen, ALR suspensions still apply under the same 15-day deadline.
A minor charged with DUI may instead be charged with the adult DWI if there is evidence of actual impairment — meaning the state's evidence will determine which charge is filed.
- Tex. Transp. Code §106.041 — DUI — minor with any detectable alcohol, Class C misdemeanor
- Tex. Transp. Code §49.04 — DWI — adult standard, BAC ≥0.08 or impairment
DWI in Texas — The Adult Standard
Driving While Intoxicated (DWI) under Tex. Transp. Code §49.04 applies to any person — adult or minor — who:
• Does not have normal use of mental or physical faculties by reason of introduction of alcohol, controlled substance, drug, dangerous drug, combination of substances, or any other substance into the body, OR
• Has a blood or breath alcohol concentration of 0.08 or higher
The key difference from DUI: DWI does not require intoxication by alcohol alone — any impairing substance qualifies. And for adults, there is no 'any detectable amount' rule — the state must prove either impairment or BAC ≥0.08.
For minors involved in accidents with injuries, or minors with prior alcohol-related records, prosecutors may charge DWI rather than DUI even if the BAC is below 0.08 — relying on the 'not normal use' prong.
Frequently Asked Questions
Is DWI worse than DUI in Texas?+
Yes, for adults. DWI is a Class B misdemeanor minimum (up to $2,000 fine, 72-180 days jail) while DUI for a minor first offense is a Class C misdemeanor (up to $500 fine, no jail). However, for minors, a DWI charge rather than DUI means adult-level penalties, which is significantly more serious.
Can a minor be charged with DWI in Williamson County?+
Yes. A minor can be charged with either DUI (any detectable alcohol, Class C) or DWI (impairment or BAC ≥0.08, Class B misdemeanor). If the minor's BAC is 0.08 or higher, or if there is evidence of actual impairment, the DA's office in Williamson County may file DWI rather than DUI.
What is a DUID in Texas?+
Texas does not use the term 'DUID' officially, but DWI covers driving while impaired by any substance — not just alcohol. A person impaired by marijuana, prescription medications, or other drugs is charged under the same Tex. Transp. Code §49.04 DWI statute as an alcohol-impaired driver.