Austin DUI Lawyer | Under-21 Zero Tolerance Defense

Under-21 DUI Defense in Austin — Zero Tolerance Explained

A DUI in Texas is a Class C misdemeanor under TABC §106.041 that applies only to drivers under 21 with any detectable amount of alcohol — no 0.08 BAC required. If you or your child has been charged, call Austin DUI attorney Mark Hull at 512-599-9999. The Hull Firm handles under-21 DUI cases across Austin, Travis County, and Central Texas.

A DUI in Texas under Alcoholic Beverage Code §106.041 applies only to drivers under 21 with any detectable amount of alcohol — no 0.08 BAC required. The charge is a Class C misdemeanor punishable by a fine up to $500, 20 to 40 hours of community service, mandatory alcohol awareness education, and a 60-day driver's license suspension. A DUI carries no jail time. But the criminal record that follows a conviction affects college admissions, scholarships, FAFSA eligibility, and future professional licensing unless the case is dismissed or expunged. Our Austin DWI lawyer handles both DUI and DWI cases for clients under 21.

The distinction between Texas DUI and DWI matters enormously for any student case. DUI applies only to under-21 drivers with any detectable alcohol. DWI applies to drivers of any age with BAC 0.08 or above or who are impaired. If a driver under 21 blows 0.08 or above on the Intoxilyzer 9000, the charge is not a DUI — it is a full adult DWI under Penal Code §49.04 with 72 hours to 180 days of jail exposure, a fine up to $2,000, and a permanent record with no expungement path. The full DUI vs DWI legal difference is covered on its own page.

UT Austin, ACC, and St. Edward's student cases come in regularly from APD stops near West Campus, Rainey Street, 6th Street, and I-35 south. Roadside breath tests showing any alcohol are enough to charge a minor under the zero tolerance law. Field sobriety tests and their NHTSA-protocol challenges apply the same way they do in adult DWI cases. Allison Tisdale prosecuted under-21 alcohol cases as a former Travis County DWI prosecutor before joining the defense — she knows how the Travis County Attorney's Office evaluates these student files. Call 512-599-9999 the same day as the stop.

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Under-21 DUI in Austin? Free Case Review

A DUI on a minor's record affects college admissions, scholarships, and FAFSA eligibility. Texas DUI can be expunged in some circumstances — but only if the case is handled correctly from day one. Tell us what happened and an Austin DUI attorney will review the case at no charge.

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What is a DUI in Texas?

A DUI — Driving Under the Influence — is a Texas offense under Alcoholic Beverage Code §106.041 that applies only to drivers under 21 years old who have any detectable amount of alcohol in their system while operating a motor vehicle. Also called the zero tolerance law, DUI is a Class C misdemeanor with a maximum $500 fine, 20 to 40 hours of community service, mandatory alcohol awareness education, and a 60-day driver's license suspension. A Texas DUI carries no jail time.

There is no minimum BAC threshold for DUI in Texas. A breath or blood test showing 0.01 is enough to charge a minor. The evidence can be a roadside breath test, a portable breath tester, a post-arrest Intoxilyzer 9000 test, or a blood draw. Any detectable alcohol triggers the charge. The practical effect is that student DUI cases often turn on whether the traffic stop itself was legally justified — the same Fourth Amendment analysis that governs adult Austin DWI cases applies here.

The other common question after a DUI stop: how does it differ from a DWI? Our DUI vs DWI Texas comparison page breaks out every difference — age of driver, BAC threshold, governing statute, charge level, jail exposure, and record consequences. If the driver is under 21 but blew 0.08 or above, the charge is DWI, not DUI, and the first-time DWI defense analysis applies.

Can a minor get a DUI in Texas?

Yes. Texas DUI under Alcoholic Beverage Code §106.041 applies exclusively to drivers under 21. A minor with any detectable alcohol — measured by roadside breath test, Intoxilyzer 9000, or blood draw — can be charged with DUI. The charge is a Class C misdemeanor prosecuted in the Travis County Justice of the Peace courts, not the Travis County Courts at Law. A conviction carries a $500 fine maximum, community service, alcohol awareness education, and a 60-day license suspension, but no jail time. A second DUI offense carries increased penalties and a longer suspension.

Minors under 17 are handled through the Travis County juvenile system under Texas Family Code, not the adult JP courts. The procedural path differs but the substantive DUI law is the same. First-offense minor cases often resolve with deferred disposition or alternative sentencing depending on the court, the prosecutor, and the strength of the defense. Unlike DWI, DUI does allow deferred adjudication — which is one of several critical advantages of keeping the charge at DUI rather than letting it escalate to DWI.

For a minor who blew 0.08 or above, the charge is not DUI — it is adult DWI under Penal Code §49.04 with full Class B misdemeanor exposure: 72 hours to 180 days jail, $2,000 fine, and a permanent record with no expungement. Our first-time DWI defense page covers that pathway in full. In either scenario — DUI or DWI for a minor — the defense analysis starts at the traffic stop under Rodriguez and works forward through the BAC evidence.

How long does a DUI stay on a minor's record in Texas?

A Texas DUI appears on the criminal record initially but is generally eligible for expungement under Texas Code of Criminal Procedure Chapter 55 two years after the sentence is completed, provided there are no other convictions during that period. Expungement legally removes the DUI from public records and allows the person to answer “no” to most background check questions about arrests or convictions. In contrast, a DWI conviction — which is what a driver under 21 faces with BAC 0.08 or above — cannot be expunged at any time and remains on the record permanently.

The expungement pathway is one of the most important reasons to keep a student case at DUI rather than letting it escalate. If the defense can suppress the 0.08+ BAC evidence through Intoxilyzer 9000 challenges, blood draw chain-of-custody problems, or improper operator certification, an initial DWI charge can in limited circumstances be reduced to DUI during plea negotiation. That conversion changes the record outcome from permanent to expungeable. Details on the BAC attack layers are on our BAC and breath test defense page.

Expungement is not automatic. The client or counsel must file a Petition for Expunction in the court of record and meet the statutory waiting period, the no-other-convictions requirement, and the sentence-completion requirement. Our criminal record expungement page covers the full Chapter 55 procedure. DWI convictions, by contrast, are covered in detail on the DWI conviction consequences page — those never come off the record.

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When does a DUI become a DWI in Texas?

A Texas DUI becomes a DWI the moment the driver's blood alcohol concentration reaches 0.08 or above, regardless of age. Under Penal Code §49.04, any driver with BAC 0.08+ or who has lost the normal use of mental or physical faculties faces a Class B misdemeanor DWI charge — not a DUI. For drivers under 21, this means the zero tolerance Class C misdemeanor DUI escalates into an adult DWI with 72-hour minimum jail exposure, up to a $2,000 fine, DPS surcharges, and a permanent criminal record with no expungement path.

The escalation from DUI to DWI is determined at the time of the BAC test, not at the time of charging. If the roadside PBT or the post-arrest Intoxilyzer 9000 registered 0.08 or above, the prosecutor files DWI regardless of the driver's age. This is why BAC evidence challenges become the central defense battleground in under-21 cases where the breath or blood result is near the 0.08 threshold. Full Intoxilyzer 9000 and blood draw attack layers are on our BAC and breath test defense page.

The practical consequence of the DUI-to-DWI escalation: the minor loses access to expungement under Chapter 55. Where a DUI can be wiped from the record two years after sentence completion, a DWI conviction remains forever. That difference is why the defense goal in a near-threshold under-21 case is either dismissal outright, or successful BAC suppression that allows a reduction from DWI to DUI so expungement is preserved. See our first-time DWI defense page for the full adult-DWI procedural analysis if the case is charged at Class B or above.

UT Austin, ACC, and St. Edward’s DUI Cases

Student DUI cases from UT Austin, ACC, and St. Edward's University come in regularly from APD stops near West Campus, Rainey Street, 6th Street, Riverside Drive, and I-35 south of downtown. The same Fourth Amendment traffic-stop analysis and NHTSA field sobriety test challenges that apply to adult Austin DWI cases apply to these student cases — with an added layer: collateral consequences to college admissions, scholarships, FAFSA eligibility, and professional program applications.

A Texas DUI conviction does not automatically terminate federal financial aid, but drug-related convictions can, and schools run their own background screens for scholarship and housing decisions. Graduate school applications — law, medical, business — ask about every criminal charge and require disclosure even if the case was expunged. Our defense strategy for every student DUI case includes a collateral-consequences analysis at intake, not just the criminal sentence analysis.

The procedural path for student DUI cases runs through the Travis County Justice of the Peace courts for Class C DUI and the Travis County Courts at Law for any escalated DWI versus DUI charge. For under-17 cases, the matter moves to the Travis County juvenile court under Texas Family Code procedures. Different courts, same defense analysis: challenge the stop, challenge the evidence, engage the prosecutor with documented arguments. Parents evaluating counsel options should review how to choose the right Austin criminal defense lawyer — case mix, responsiveness, local insight, and transparent fees are the criteria that matter. Call 512-599-9999 the same day as the arrest.

Austin DUI Defense FAQ — Under-21 Zero Tolerance

What parents and students ask Austin DUI attorneys most often after a Travis County stop.

Can you get a DUI in Texas if you are over 21?+

No. In Texas, DUI under Alcoholic Beverage Code §106.041 applies only to drivers under 21. A driver 21 or older stopped for alcohol-related driving in Texas cannot be charged with DUI — the applicable charge is DWI under Penal Code §49.04, which requires BAC 0.08 or above or evidence of impairment. The difference is jurisdictional: DUI is a Class C in JP courts, DWI is Class B or higher in the Courts at Law.

What is the penalty for an under-21 DUI in Texas?+

A first-offense DUI in Texas is a Class C misdemeanor with a fine up to $500, 20 to 40 hours of community service, mandatory alcohol awareness education, and a driver's license suspension of up to 60 days. There is no jail time. A second DUI offense carries increased fines, longer suspension, and more community service hours. A third DUI can trigger more serious handling.

Can a DUI in Texas be expunged from a minor's record?+

Yes, in most cases. A Texas DUI is generally eligible for expungement under Code of Criminal Procedure Chapter 55 two years after successful sentence completion, provided there are no other convictions during that period. Expungement legally removes the charge from public records. The petition must be filed correctly in the court of record; expungement is not automatic.

Will a DUI affect college admissions or FAFSA?+

Possibly. A Texas DUI does not automatically terminate federal financial aid, but it must be disclosed on most college and graduate school applications and on professional licensing applications. Schools run their own background screens for scholarship, housing, and program decisions. Drug-related convictions carry additional federal aid consequences. Expungement of the DUI mitigates most of these effects long-term.

What's the difference between a Texas DUI and a DWI?+

DUI applies only to drivers under 21 with any detectable alcohol — a Class C misdemeanor with a maximum $500 fine and no jail time. DWI applies to any driver with BAC 0.08+ or impairment and is a Class B misdemeanor or higher, with 72 hours to 180 days jail exposure, up to $2,000 in fines, and a permanent record with no expungement. A minor with BAC 0.08+ faces DWI, not DUI.

Can I refuse a roadside breath test in Texas if I'm under 21?+

Yes. Roadside preliminary breath tests and portable breath testers are generally voluntary under Texas law, and field sobriety tests — HGN, Walk and Turn, One Leg Stand — are always voluntary. Refusing does not prevent the prosecution, but it does limit the evidence the state can use. Post-arrest chemical testing under implied consent is a different analysis with separate ALR consequences.

Can a DWI be reduced to a DUI in Texas?+

Generally only if the defendant is under 21 and the BAC evidence is successfully challenged to below 0.08. For adult defendants (21+), DUI does not exist as a charge, so reduction to DUI is not available. For under-21 defendants with a challenged BAC, a DWI-to-DUI reduction is strategically valuable because DUI allows expungement and DWI does not.

What happens if a UT Austin student is arrested for DUI?+

The criminal case proceeds through the Travis County Justice of the Peace courts for Class C DUI charges. The university's own conduct process is separate and runs on its own timeline. Most schools require self-reporting of criminal charges. The DUI itself does not automatically terminate enrollment, but disciplinary review can affect housing, financial aid packaging, and eligibility for certain programs. Counsel at both the criminal and conduct stages is recommended.

How much does an Austin DUI lawyer cost?+

DUI defense fees in Austin vary by case complexity and whether the case is charged as Class C DUI or escalated DWI. The Hull Firm offers payment plans and a free initial consultation on every case. The cost of representation is almost always less than the combined cost of a conviction: fines, community service, alcohol education, license reinstatement, insurance increases, and the long-term record consequence on college admissions and graduate school applications.

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DUI Defense Lawyer Austin — Under-21 Zero Tolerance

Under-21 DUI Defense in Austin — Zero Tolerance Explained

Protecting Student Records & Future

What is a DUI in Texas?

Can a minor get a DUI in Texas?

How long does a DUI stay on a minor's record in Texas?

When does a DUI become a DWI in Texas?

UT Austin, ACC, and St. Edward’s DUI Cases

Austin DUI Defense FAQ — Under-21 Zero Tolerance

Austin DWI Attorney Resources

Austin DWI Lawyer

First-Time DWI Defense

BAC & Breath Test Defense

DWI Conviction Consequences

DUI Defense (Under 21)

Texas DWI Laws

DUI vs. DWI in Texas

Austin Criminal Defense

What Our Clients Say

Under-21 DUI Arrest in Austin? Call Now.