A first DWI in Texas: what it can result in
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A misdemeanor — unless one of four facts is true. The 72 hours are written into the offense itself, not left to the judge: section 49.04(b) sets a minimum term of confinement, and the Class B ceiling of 180 days and $2,000 comes from the general punishment section. That is the answer to whether jail time is mandatory for a first DWI in Texas — some confinement is, though in practice it is routinely served as a condition of probation rather than as a straight sentence.
Written any number of ways — a 1st offense DWI, DWI 1st, DWI first offense TX, or a first DWI in TX — and the paperwork will use none of them. Texas charges it under a section number, and that is what decides the range below.
Grade. Class B misdemeanor
Confinement. 72 hours minimum, up to 180 days
Fine. Up to $2,000
Texas Penal Code, chapter 49 · Tex. Penal Code § 49.04(b); § 12.22 · checked 2026-09-04
What turns this DWI into something worse
Each line below is a separate provision with its own punishment range. They stack with the arithmetic of prior convictions rather than replacing it.
| The fact | What it makes it | Detail and source |
|---|---|---|
| A passenger younger than 15 | State jail felony, 180 days to 2 years | This one carries no counting at all: a child in the car makes the offense a state jail felony on a first arrest, with a fine of up to $10,000. It is the most common way an ordinary first DWI stops being a misdemeanor. Texas Penal Code, chapter 49 · Tex. Penal Code § 49.045; § 12.35 · checked 2026-09-04 |
| A school crossing zone, during the reduced-limit hours | State jail felony — new on 1 September 2025 | Senate Bill 826 added subsection (e) to the DWI offense: driving intoxicated in a school crossing zone while the reduced speed limit applies is a state jail felony. Location and time of day alone now decide whether the same conduct is a misdemeanor or a felony, and the change applies only to offenses committed on or after 1 September 2025. Texas Legislature, S.B. 826 (89R), enrolled text · Tex. Penal Code § 49.04(e) · checked 2026-09-04 |
| A reading of 0.15 or more | Class A misdemeanor — up to a year and $4,000 | The offense is graded up when the analysis shows 0.15 or higher at the time of testing. Note what the statute measures: the concentration at analysis, not at the roadside, and not what you think you drank. Texas Penal Code, chapter 49 · Tex. Penal Code § 49.04(d); § 12.21 · checked 2026-09-04 |
| An open container within reach | Still Class B, but the floor doubles to six days | An open container of alcohol in your immediate possession does not change the class of the offense — it changes the minimum, from 72 hours to six days. A detail worth knowing before deciding what to leave in the cupholder. Texas Penal Code, chapter 49 · Tex. Penal Code § 49.04(c) · checked 2026-09-04 |
New Texas law you may have read about
Changes reach only conduct on or after the effective date — an arrest from before it is judged by the old law, whichever way that cuts.
A school crossing zone turns a DWI into a state jail felony
The bill amended the DWI section itself, adding subsection (e). No prior conviction is needed and no one has to be hurt — the offense is a felony if the vehicle was in a school crossing zone during the hours the reduced speed limit applies. It reaches only conduct on or after the effective date.
Texas Legislature, S.B. 826 (89R), enrolled text · checked 2026-09-04
The bill that would have raised a first DWI — and failed
It proposed making a first DWI a Class A misdemeanor and a first offense at 0.15 or higher a state jail felony. It did not make it out of committee in May 2025. A first DWI in Texas is still a Class B misdemeanor, and 0.15 or higher is still a Class A — exactly as before the session. If you read that Texas toughened its first-offense penalties in 2025, this is the bill you read about.
Texas Legislature Online, S.B. 2320 (89R) history · checked 2026-09-04
The device is a separate track
Texas attaches the interlock to the license itself: when a court order reaches the Department, your driving privilege is canceled on the 30th day after it notifies you, unless you fit a device and obtain a restricted interlock license. The restriction is also mandatory by statute for anyone granted an occupational license after a DWI conviction, whether or not the order spells it out — a judge can waive it only by finding it unnecessary for public safety.
In Texas the interlock term runs Length of suspension and is administered by Texas Department of Public Safety, on the court order — which is why a plea that settles the criminal case does not settle the device. What counts as a violation on it, and what an agency adds to the term, is its own arithmetic: violations and lockouts. Getting it off at the end is a procedure of its own too — removal and waivers.
Source: Texas Department of Public Safety, on the court order
Texas DWI questions
Is jail time mandatory for a 1st DWI in Texas?
The 72 hours are written into the offense itself, not left to the judge: section 49.04(b) sets a minimum term of confinement, and the Class B ceiling of 180 days and $2,000 comes from the general punishment section. That is the answer to whether jail time is mandatory for a first DWI in Texas — some confinement is, though in practice it is routinely served as a condition of probation rather than as a straight sentence.
How likely is jail time for a first DWI in TX?
Start from what the statute forces and what it leaves to the judge. The floor here is 72 hours minimum, up to 180 days, and it moves on the facts: a passenger younger than 15 means state jail felony, 180 days to 2 years. Everything above that floor is argued, and the same conviction can end up served in custody, on work release or as a condition of probation depending on the county and the judge. What no one can promise you is a sentence below the statutory minimum — that is not a question of persuasion.
What is the punishment range for a 1st DWI in Texas?
Class B misdemeanor: 72 hours minimum, up to 180 days, and a fine of up to $2,000. The range is set by Tex. Penal Code § 49.04(b); § 12.22, and the figures on this page come from the statute rather than from a summary of it.
What makes it worse in Texas?
A passenger younger than 15 — state jail felony, 180 days to 2 years. A school crossing zone, during the reduced-limit hours — state jail felony — new on 1 september 2025. A reading of 0.15 or more — class a misdemeanor — up to a year and $4,000. An open container within reach — still class b, but the floor doubles to six days.
Does an interlock come with it in Texas?
Texas attaches the interlock to the license itself: when a court order reaches the Department, your driving privilege is canceled on the 30th day after it notifies you, unless you fit a device and obtain a restricted interlock license. The restriction is also mandatory by statute for anyone granted an occupational license after a DWI conviction, whether or not the order spells it out — a judge can waive it only by finding it unnecessary for public safety. The device requirement and the criminal penalty are separate tracks: one is handled by the court, the other by Texas Department of Public Safety, on the court order.
Other steps in Texas: second offense penalties and when it becomes a felony penalties.
All Texas DWI rules →Penalties across the states →Texas DUI lawyers →Getting the license back →
Attorney advertising. InterlockDeviceNearMe is not a law firm, does not practice law, and does not give legal advice. Nothing here creates an attorney-client relationship. Requesting a consultation connects you with an independent attorney or a legal referral service, who decide separately whether to take your case. Case outcomes depend on facts we do not know, and no result is ever promised. Deadlines in DUI cases are short and vary by state — speak to a licensed attorney in your state before relying on anything you read here.