The Ultimate Guide to Texas DWI: 2026 Edition

Chapter 1: What Counts as DWI in Texas

Texas Penal Code § 49.04(a) defines DWI: “A person commits an offense if the person is intoxicated while operating a motor vehicle in a public place.” The key elements are (1) operating, (2) a motor vehicle, (3) in a public place, (4) while intoxicated.

What is "intoxicated"?

Penal Code § 49.01(2) defines “intoxicated” two ways:

• Mental or physical impairment — not having the normal use of mental or physical faculties by reason of alcohol, controlled substance, drug, dangerous drug, or combination
• Per se intoxication — a blood alcohol concentration (BAC) of 0.08 or more

The State can prove either definition. A driver with a BAC under 0.08 can still be convicted on the impairment definition; conversely, a driver who is not visibly impaired but tests at 0.08+ can be convicted on the per se definition.

What is "operating"?

Texas courts have interpreted “operating” broadly to include not just driving but actions exerting personal control over the vehicle — sitting in the driver’s seat with the engine running, even when parked. See Denton v. State, 911 S.W.2d 388 (Tex. Crim. App. 1995).

What is a "public place"?

Penal Code § 1.07(40) defines “public place” expansively — streets, highways, parking lots open to the public, the common areas of apartment complexes, and even private property accessible to the public.

Chapter 2: Penalties at Every Level

First-Offense DWI

• Class B misdemeanor under § 49.04(b)
• 72 hours minimum to 180 days county jail
• Up to $2,000 fine
• License suspension 90 days to 1 year
• Mandatory DWI education program
• Possible probation in lieu of jail

First Offense, BAC 0.15 or Higher

• Class A misdemeanor under § 49.04(d)
• Up to 1 year county jail
• Up to $4,000 fine
• Same license consequences

Second-Offense DWI

• Class A misdemeanor under § 49.09(a)
• 30 days to 1 year jail
• Up to $4,000 fine
• Suspension up to 2 years
• Mandatory ignition interlock

Third or Subsequent Offense (Felony DWI)

• Third-degree felony under § 49.09(b)
• 2 to 10 years TDCJ
• Up to $10,000 fine
• Federal firearm prohibition (18 U.S.C. § 922(g)(1))
• See Mapes v. State, 187 S.W.3d 655 (Tex. App. 2006); State v. Karasek, No. 14-09-00834-CR (Tex. App. 2010)

DWI With Child Passenger

• State jail felony under § 49.045 when passenger under 15
• 180 days to 2 years state jail
• Mandatory CPS investigation

Intoxication Assault & Manslaughter

• Intoxication assault (§ 49.07): Third-degree felony for causing serious bodily injury
• Intoxication manslaughter (§ 49.08): Second-degree felony for causing death; first-degree if victim is peace officer, firefighter, or EMS

Chapter 3: License Suspension & ALR Hearings

Texas DWI triggers two completely separate license suspensions:

1. Civil (administrative) suspension — Transportation Code Chapters 524 and 724, handled by DPS, occurs regardless of criminal outcome
2. Criminal conviction suspension — imposed by the criminal court if convicted

The 15-Day Rule

To challenge the administrative suspension, you must request an Administrative License Revocation (ALR) hearing in writing within 15 days of arrest under Transportation Code § 524.031. Miss the deadline and the suspension is automatic 40 days after arrest — no second chances.

What Happens at the ALR Hearing

The ALR hearing is a civil proceeding before an administrative law judge at the State Office of Administrative Hearings (SOAH). DPS must prove by preponderance:

• Reasonable suspicion for the stop
• Probable cause to arrest
• Proper DIC-24 statutory warnings
• Refusal of testing or BAC of 0.08+

Even if the ALR hearing doesn’t prevent the suspension, your attorney’s cross-examination of the arresting officer under oath provides invaluable evidence for the criminal defense.

Chapter 4: Field Sobriety, Breath, and Blood Tests

Standardized Field Sobriety Tests

Three NHTSA-approved tests are standard:

• Horizontal Gaze Nystagmus (HGN) — eye-tracking test for alcohol-induced jerking
• Walk-and-Turn — nine heel-to-toe steps, turn, nine steps back
• One-Leg Stand — balance on one leg for 30 seconds

Officers are required to follow specific NHTSA protocols. Deviations — uneven surfaces, poor lighting, footwear issues, medical conditions — compromise reliability.

Breath Tests (Intoxilyzer 9000)

Texas uses the Intoxilyzer 9000 for breath testing. Common defense issues:

• Calibration records and inspection logs
• 15-minute observation period compliance
• Radio frequency interference
• Mouth alcohol contamination
• Operator certification

Blood Tests

Blood draws after DWI arrest typically require warrants under Missouri v. McNeely, 569 U.S. 141 (2013), except in mandatory situations (accidents with serious injury, multiple priors, child passenger). Defense issues include:

• Warrant validity and probable cause
• Chain of custody
• Sample storage and preservation
• Lab methodology (gas chromatography vs. immunoassay)
• Operator credentials

Refusing the Test

Texas Transportation Code § 724.013 allows refusal, but triggers a 180-day suspension (2 years for repeat refusal). Officers typically obtain warrants quickly. Refusal is also admissible at trial under § 724.061.

Chapter 5: Defending Your DWI Case

Motion to Suppress

The most powerful defense tool. Under Texas Code of Criminal Procedure art. 38.23, evidence obtained in violation of constitutional rights is excluded. Common grounds:

• No reasonable suspicion for stop — under Terry v. Ohio, 392 U.S. 1 (1968)
• Prolonged detention — under Rodriguez v. United States, 575 U.S. 348 (2015)
• Lack of probable cause for arrest
• Defective Miranda warnings
• Illegal blood draw

If the motion succeeds, evidence is excluded and the case typically dismisses.

Challenging Intoxication

• Medical conditions causing FST failures
• Diabetes, GERD, fatigue, stress
• Mouth alcohol from recent drinking, mouthwash, or medical conditions
• Rising BAC defense (BAC was below 0.08 at time of driving)

Operating Defense

If you weren’t actually driving (sleeping in the car, passenger, parked elsewhere), the operation element may fail.

Chapter 6: Plea Negotiations & Reductions

Most DWI cases resolve through negotiation. Common outcomes:

Reduction to Obstruction

Many Collin and Dallas County DWI cases reduce to obstruction of a highway passageway under Penal Code § 42.03 — avoiding mandatory DWI license suspensions and DPS surcharges. Reductions require strong defense leverage, evidence of procedural issues, or clean prior record.

Deferred Adjudication

Available for first-offense DWI since September 2019. Successful completion results in dismissal and possible non-disclosure under Gov’t Code § 411.071.

Pre-Trial Diversion

Some Collin County cases qualify for pre-trial diversion — community service, education, restitution — with full dismissal upon completion.

Chapter 7: Occupational Driver’s Licenses

Even if your license is suspended, an occupational license under Transportation Code § 521.242 lets you drive up to 12 hours per day for work, school, or essential household duties. Process:

1. File petition in justice or county court
2. Obtain SR-22 financial responsibility insurance
3. Show essential need under § 521.244
4. Comply with ignition interlock requirements (§ 521.246)

See our full Occupational Driver’s License Guide.

Chapter 8: DWI on Your Record — Forever?

A DWI conviction cannot be expunged in Texas. However:

• Acquittals or dismissals qualify for expunction under Code of Criminal Procedure art. 55
• Deferred adjudication completions may qualify for non-disclosure under Gov’t Code § 411.071
• Reduced charges (e.g., obstruction) may have different record implications

See our Expunction vs. Non-Disclosure Guide for full details.

This guide is general information, not legal advice. Texas DWI law is complex and fact-specific. Consult a licensed Texas attorney about your specific situation.