What Is the Difference Between a DWI and a DUI in Texas?

In Texas, adults don’t get DUIs. DWI is the charge for driving while intoxicated at any age. DUI is a separate, much smaller offense that only applies to drivers under 21, and it doesn’t require intoxication at all. Any detectable amount of alcohol is enough. A DWI is worse by a wide margin.

If your son or daughter was arrested and you’re trying to work out which one it is, the paperwork will say. Call (713) 664-4000 before anyone pays a ticket or signs anything. With a young driver, the gap between the two charges is often the whole case.

DWI: intoxication, at any age

Under Penal Code § 49.04(a), a person commits DWI by operating a motor vehicle in a public place while intoxicated. There’s no age in that sentence. “Intoxicated” means either losing the normal use of your mental or physical faculties, or having an alcohol concentration of 0.08 or more (§ 49.01(2)).

A first DWI is a Class B misdemeanor with a 72-hour minimum term of confinement, up to 180 days in jail and a $2,000 fine. It’s a Class A at 0.15 or higher, and a second DWI is a Class A with a 30-day minimum. A conviction brings a license suspension of 90 days to a year for an adult under Transportation Code § 521.344, and a year for a driver under 21 under § 521.342(b), unless the driver is on community supervision with an ignition interlock condition.

So a 19-year-old at 0.09 is charged with DWI, not DUI. Being under 21 doesn’t soften anything.

DUI: under 21, any detectable alcohol

Alcoholic Beverage Code § 106.041(a) makes it an offense for a minor, meaning anyone under 21, to drive in a public place “while having any detectable amount of alcohol in the minor’s system.” One beer at a graduation party is enough. The State doesn’t have to prove impairment or any number.

A first or second DUI is a Class C misdemeanor, which means a fine of up to $500 and no jail. The court also has to order 20 to 40 hours of alcohol-related community service on a first offense (40 to 60 on a second) under § 106.041(d), and an alcohol awareness program under § 106.115. The administrative license suspension is 60 days for a first, 120 for a second and 180 for a third under Transportation Code § 524.022(b).

The third one is different. For a driver 17 or older with two prior DUI convictions, § 106.041(c) allows a fine of $500 to $2,000 and up to 180 days in jail, and subsection (f) takes deferred disposition off the table.

An officer doesn’t have to arrest on a DUI. Section 106.041(i) lets him write a citation with a court date instead, which is why a lot of families treat it like a traffic ticket and pay it. Don’t. A paid ticket is a conviction, and it counts as a prior for the next one.

Which is worse, a DUI or a DWI?

A DWI, by every measure. A DUI is a fine-only offense on a first and second charge; a DWI carries jail, a criminal record that never ages off, and a license suspension up to a year. A first DUI is eligible for deferred disposition in a justice or municipal court. A DWI is a county court case with a prosecutor, a breath or blood number, and a jury if it goes to trial.

A DWI can’t turn into a DUI at trial

This catches people off guard. Section 106.041(g) says a DUI “is not a lesser included offense” of DWI. So a jury that isn’t convinced a young driver was intoxicated can’t split the difference and convict of DUI. The State either proves the DWI or it doesn’t.

That makes a DUI a negotiated outcome, not a verdict. When a DWI case against an under-21 client is weak on intoxication, the outcome worth pushing for is a dismissal refiled as a DUI citation: a Class C, a fine, a class, and deferred disposition on a first. For a college student or someone headed into a licensed profession, that’s the difference between a criminal record and something that can be cleaned up.

Can a DWI be reduced?

Depending on the county and the facts, yes. Where the breath or blood result is close to 0.15, the State can abandon the Class A allegation and proceed on the Class B. Harris County doesn’t reduce DWIs to reckless driving or obstruction of a highway, though some neighboring counties will on weaker cases. What gets a reduction is the same thing that gets a dismissal: a problem with the State’s evidence.

Sometimes the problem is the number itself. Jay won a case by showing that his client’s breath result reflected the ketogenic diet he was on, not alcohol. He’s an ACS-CHAL Forensic Lawyer-Scientist trained in forensic chromatography, the lab method behind blood testing, and a certified instructor in the field sobriety tests the officer asked your client to do.

What happens at the stop for a driver under 21

Implied consent under Transportation Code § 724.011(a) covers a minor arrested for DUI the same as an adult arrested for DWI. Refusing a breath or blood test suspends the license for 180 days, or two years with a prior alcohol- or drug-related enforcement contact in the last ten years (§ 724.035), and the officer can seek a warrant for blood.

Either way, the license fight has its own deadline. You have 15 days from the notice to request an ALR hearing, and if you miss it the suspension takes effect without one.

Talk to a Houston DWI lawyer

We’ve defended DWI and DUI cases in Harris County since 2009, and criminal defense is the only thing this office does. If you’re a parent calling for your kid, we’re used to that. Tell us what the paperwork says, what the officer said the number was, and when the court date is. Our Houston DWI lawyer page covers how we handle these cases.

Call (713) 664-4000.