Will You Serve Jail Time If You Are Convicted of DWI in Texas?

 Posted on June 16, 2026 in DWI / DUI

Jail time is possible even for a first-time DWI conviction in Texas. Whether you actually serve time behind bars depends on factors like your prior record, your blood alcohol level, whether anyone was injured, and how your case is resolved. Some first-time offenders avoid jail entirely. Others do not. If you are facing a DWI charge in 2026, a San Antonio DWI defense lawyer can help you understand what the penalties look like in your specific situation and what can be done to fight for you.

What Are the Penalties for a First-Time DWI in Texas?

A first-time DWI with no aggravating factors is a Class B misdemeanor under Texas Penal Code Section 49.04. The penalties include a minimum of 72 hours in jail and a maximum of 180 days. There is also a fine of up to $2,000, plus court costs and fees that can add significantly to that amount.

That 72-hour minimum is important. Unlike some states where a first offense can result in no jail time at all, a first-time DWI conviction in Texas carries a statutory minimum jail sentence of 72 hours. Some defendants may be able to avoid or significantly reduce actual time in custody through probation or other case outcomes 

If your blood alcohol concentration was 0.15 or higher at the time of arrest, the charge is elevated to a Class A misdemeanor under Texas Penal Code Section 49.04(d). That raises the maximum jail time to one year and the maximum fine to $4,000.

When Does a DWI Carry the Harshest Penalties in Texas?

Certain circumstances can make a DWI charge much more serious than a standard offense. If a child under 15 was in the vehicle at the time of the offense, the charge becomes intoxication child endangerment under Texas Penal Code Section 49.045. That is a state jail felony carrying 180 days to two years in a state jail facility and a fine of up to $10,000.

If someone was seriously injured as a result of the DWI, the charge becomes intoxication assault under Texas Penal Code Section 49.07, which is a third-degree felony. If someone was killed, the charge becomes intoxication manslaughter under Texas Penal Code Section 49.08, a second-degree felony carrying two to 20 years in prison.

These charges are prosecuted very aggressively in Texas, and the potential prison sentences reflect how seriously the law treats DWI offenses that hurt or kill others.

Can You Avoid Jail Time for a First-Time DWI in Texas?

Texas law requires a minimum jail sentence upon conviction. However, there are ways the situation can be resolved that may allow you to avoid or minimize time behind bars.

One option is probation, also called community supervision. A judge can place a first-time DWI offender on probation instead of sending them to jail. Probation comes with conditions like attending alcohol education classes, completing community service, and submitting to random testing. Violating probation can result in jail time being imposed.

Another factor is how your case is resolved. If charges are reduced or dismissed through a strong defense, the mandatory minimums may not apply. An experienced attorney can evaluate whether there are grounds to challenge the stop, the testing, or other aspects of the case that could change the outcome entirely.

What Is an Ignition Interlock Device and Will You Have to Use One for a DWI Conviction?

An ignition interlock device, or IID, is a breathalyzer connected to your vehicle's ignition. You have to blow into it before the car will start. In Texas, a judge can require an IID as a condition of bond, probation, or license reinstatement after a DWI conviction. For repeat offenders or cases involving a high BAC, an IID is commonly required. It is an added burden and expense, but it is often required as a condition of bond, probation, or driving privileges after a DWI arrest or conviction.

How Do You Fight a DWI Charge in Texas?

Never assume that being charged with a DWI means that you will be convicted. You still have the right to fight the charges. Your attorney will look at whether the officer had a valid reason to pull you over in the first place. Without a legal basis for the stop, evidence gathered afterward may not be usable in court.

Your attorney will also examine how field sobriety tests were administered, whether the breathalyzer device was properly maintained and calibrated, and whether blood test samples were handled correctly.

Other factors can affect the outcome, too. A medical condition may have influenced how you performed on sobriety tests. Rising blood alcohol is another issue, meaning your BAC may have been below the legal limit while you were driving, but rose by the time you were tested. Problems with how law enforcement conducted the investigation can also play a role. Every case is different, and the strength of a defense depends on the specific facts involved.

Contact Our San Antonio, TX DWI Defense Attorney Today

The first step in building your defense is to speak with a lawyer you can trust. Attorney Lock began his career in civil litigation and has spent more than 20 years building the kind of experience that makes a real difference in criminal defense cases. Contact the San Antonio DWI defense lawyer at Law Offices of Sam H. Lock by calling 210-226-0965 to schedule a consultation.