Ask Deandra: What Is a First Offense DWI in Texas, and What Are the Penalties?

Here is the longer answer: the statutory penalties, the enhancements, the hidden costs, and why the technical maximum rarely tells the whole story.

First Offense DWI Penalties in Texas at a Glance

Charge	Jail	Criminal fine	Other consequences
Standard first DWI, Class B misdemeanor	72 hours to 180 days	Up to $2,000	License suspension of 90 days to one year, plus a separate state fine on conviction
First DWI with an open container, Class B	Minimum of six days, up to 180 days	Up to $2,000	Same suspension and state fine
First DWI with a BAC of 0.15 or higher, Class A	Up to one year	Up to $4,000	Ignition interlock as a condition of probation and, in practice, of bond; deferred adjudication unavailable

Those are the statutory ranges. Whether any of them applies depends on whether the State can prove the case, and a first DWI is more contestable than most people assume: the stop, the roadside tests, and the breath or blood result each have to hold up. Can My DWI Be Dismissed in Texas? walks through how those cases end without a conviction.

The Statutory Framework: Texas Penal Code §49.04

Driving while intoxicated in Texas is defined by Penal Code §49.04. A person commits the offense if they operate a motor vehicle in a public place while intoxicated. “Intoxicated” under §49.01 means either not having the normal use of mental or physical faculties because of the introduction of alcohol, drugs, or a combination, or having a blood alcohol concentration of 0.08 or more.

Under §49.04, a first-offense DWI is typically classified and punished as follows:

• Class B misdemeanor (standard first offense). Punishable by a minimum of 72 hours in jail and a maximum of 180 days, a fine of up to $2,000, and a driver’s license suspension.
• Class A misdemeanor (BAC 0.15 or higher). Under §49.04(d), if an analysis of a specimen of the person’s blood, breath, or urine shows an alcohol concentration of 0.15 or more at the time the analysis was performed, the offense is enhanced to a Class A misdemeanor, punishable by up to one year in county jail and a fine of up to $4,000.
• Class B with an open container. Under 49.04(c), if it is shown that at the time of the offense the driver had an open container of alcohol in immediate possession, the offense stays a Class B misdemeanor but the minimum term of confinement rises from 72 hours to six days.

These are maximum punishments, not typical sentences. Many first-offense DWI cases resolve with probation, community service, and no additional jail time beyond the initial arrest. But the statutory ceiling matters. It is the backdrop for every plea negotiation, and it is the starting point for sentencing if a case goes to trial.

Is a Texas DWI the Same Thing as a DUI?

In Texas the two terms are not interchangeable, and the difference is not cosmetic.

• DWI is the Penal Code §49.04 offense described above. It applies to any driver who is intoxicated, whether that means a BAC of 0.08 or higher or the loss of normal mental or physical faculties.
• DUI is a separate and lesser offense under Alcoholic Beverage Code §106.041. It applies only to drivers under 21, and it is triggered by any detectable amount of alcohol rather than by a BAC threshold. A first DUI is a Class C misdemeanor punishable by a fine of up to $500 with no jail, though it also carries community service and a license suspension.

The distinction matters because an underage driver can be charged either way depending on the evidence, and the gap in consequences is wide. See our DWI vs. DUI page for how those cases work.

What Happens in the First Days After the Arrest

Getting out of jail

Most first DWI arrests are misdemeanors, so release usually comes quickly. Many North Texas defendants qualify for a personal recognizance bond, which is release on a written promise to appear, or for a low cash bond commonly between $500 and $5,000 depending on the county, the reported BAC, and whether there was a crash.

Expect conditions attached to that release. Courts increasingly require an ignition interlock device, a breath unit wired to the ignition, as a condition of bond on a first DWI, particularly when the reported BAC was high or an accident was involved. No-alcohol conditions and, in some courts, a portable alcohol monitor can also apply. Violating a condition can put you back in jail while the case is still pending, so treat the conditions as seriously as the charge itself.

Two things happen next that catch people off guard. The first is the arraignment, where the charge is read and a plea is entered. The second is that the arrest opened two separate cases, one criminal and one against your license, and they run on different clocks.

What to do right now

The first days after a DWI arrest decide what evidence survives and which deadlines get met. In order of urgency:

• Hire a DWI lawyer immediately. Early work, including preserving dash and body camera video and the underlying test records, shapes everything that follows.
• Have your attorney request the ALR hearing within 15 days of the notice of suspension. This is the one hard deadline in a first DWI. It protects the license and creates an early chance to cross-examine the officer under oath.
• Stop talking about the arrest. Beyond identifying yourself, do not explain anything to officers, to friends, or on social media. Anything you say about what you drank, or when, becomes evidence.
• Write down everything while it is fresh. What you ate and drank and when, the route you drove, the reason the officer gave for the stop, which tests you were asked to perform, and how you were treated.
• Save anything that fixes your timeline. Receipts, texts, and rideshare records can establish when you stopped drinking, which drives the science of the case.

What Jail Time Actually Looks Like

The statute authorizes jail, but whether a first-offense DWI defendant actually serves jail time depends on the plea agreement or sentence entered:

• Minimum 72-hour confinement. Even on a Class B first offense, the statute requires a minimum term of 72 hours of confinement if not placed on probation.
• Probation in lieu of jail. Most first-offense DWI cases that result in conviction resolve with community supervision (probation) rather than straight jail time. Probation length is commonly one to two years.
• Jail as a condition of probation. Judges sometimes order a short jail term (three to ten days is common) as a condition of probation.
• Class A cases. A first-offense DWI enhanced to Class A because of a 0.15 or higher BAC carries heightened jail exposure and additional consequences, including the ignition interlock requirement discussed below.

Fines, Court Costs, and State Fines

The fine authorized by statute is only part of the financial picture. A first-offense DWI conviction typically generates the following categories of financial obligation:

• Criminal fine. Up to $2,000 on a Class B, up to $4,000 on a Class A
• Court costs. Several hundred dollars, added automatically to the judgment.
• Probation fees. Monthly supervision fees, typically in the range of $60 to $75 per month, for the length of any probation term.
• Program fees. Court-ordered programs (DWI education class, victim impact panel, substance abuse evaluation, repeat offender program in some cases) each carry their own costs.
• State traffic fine under Texas Transportation Code 709.001, often called the Superfine. This is usually the largest single line item in the whole case, and it is separate from the criminal fine: $3,000 on a first conviction within a 36-month period, $4,500 on a second or subsequent conviction within that period, and $6,000 for any conviction where the analysis showed an alcohol concentration of 0.15 or more. A court may waive it on a finding of indigency.
• Ignition interlock costs. Installation, monthly monitoring fees, removal, and any violation or service charges. Costs vary by provider and by the length of the interlock period.
• SR-22 filing and insurance premium increases. Discussed below, not a court cost, but a practical cost tied directly to the conviction.

Driver’s License Consequences

A first offense DWI conviction does not trigger a driver’s license suspension if probation is granted and the DWI education course is finished on time, which ordinarily means before the 181st day after community supervision begins rather than 180 days from the date of conviction.

That exception is narrower than it sounds, so it is worth seeing the full picture:

• The conviction suspension. A final DWI conviction generally suspends the license automatically under Transportation Code 521.341, and 521.344(a) sets the period at not less than 90 days and not more than one year. A conviction counts as final even if the sentence was probated.
• The probation exception. If the court places the defendant on community supervision and orders the DWI education program, Code of Criminal Procedure Art. 42A.403(b) directs the court to order that the license not be suspended, and Transportation Code §521.344(d) bars DPS from revoking it. The program has to be finished on time, ordinarily within 180 days, though the court can extend that to a year. Miss the deadline and the suspension comes back.
• The ALR suspension is separate. The administrative suspension that follows a failed or refused test runs on its own track and is not cured by finishing the education program. It is stopped only by winning or resolving the ALR case. See your driver’s license after a Texas DWI arrest.

Ignition Interlock Requirements

Ignition interlock requirements on a first DWI come from two different places, and they are routinely confused. Article 17.441 of the Code of Criminal Procedure, the mandatory bond interlock provision, does not reach a standard first offense. By its terms it applies to a subsequent offense under 49.04, 49.05, 49.06, or 49.061, or to any charge under 49.045, 49.07, or 49.08. What authorizes an interlock as a bond condition on a first DWI is Article 17.40, which lets a magistrate impose any reasonable bond condition related to the safety of a victim or of the community. On the probation side the authority is Article 42A.408. For a first-offense DWI, an interlock typically enters the case in these ways:

• Class A first offense, BAC 0.15 or higher. Article 42A.408(c)(1) requires the court to order an interlock as a condition of community supervision where an analysis showed an alcohol concentration of 0.15 or more. This one is mandatory. On the bond side there is no equivalent command for a first offense, though courts commonly impose one anyway on a high reading.
• As a discretionary condition of bond under Article 17.40. Magistrates increasingly require an interlock on a first DWI, particularly where the reported BAC was high or a crash was involved. That is a discretionary safety condition, not a statutory mandate, which is why it varies by court and by judge.
• As a condition of probation under Article 42A.408(b). Outside the 0.15 cases, a judge placing a first-offense DWI defendant on community supervision may require an interlock for part or all of the term.
• On deferred adjudication, Article 42A.408(e-1). If the judge grants deferred adjudication on a 49.04 or 49.06 case, an interlock is required unless the court finds otherwise after an evaluation. HB 3582 attached that condition to the deferred adjudication carve-out itself.

Interlock requirements look narrower than they actually are. Between bond conditions, probation conditions, and licensing requirements, many first-offense DWI defendants interact with an interlock device at some point during the case.

Probation Conditions

Probation (known in Texas as community supervision) is the typical disposition for a first-offense DWI that results in conviction. Conditions commonly include:

• DWI education class. A court-approved DWI education program, typically 12 hours, required within a defined period after placement on probation.
• Victim impact panel. Attendance at a panel presentation by victims of impaired driving.
• Substance abuse evaluation and any recommended counseling. A licensed chemical dependency counselor evaluates the defendant and recommends treatment, which the court typically orders.
• Community service. A set number of community service hours, typically 24 to 100 hours on a first offense.
• Alcohol and drug abstention. Probation conditions typically prohibit the use of alcohol and the non-prescription use of drugs during the probation period.
• Travel and residence restrictions. Defendants on probation are generally required to remain in the county or a defined area absent court permission to travel and to report residence changes.
• No further offenses. Any new arrest during the probation period can result in a motion to revoke probation.

Probation can be successfully completed by most first-offense DWI defendants. But a revocation (whether for a new offense or for technical violations of the conditions) reopens the full range of statutory punishment and can result in jail time the defendant thought was behind them.

The Class A Enhancement: BAC 0.15 or Higher

The single most common statutory enhancement on a first-offense DWI is the 0.15 BAC threshold under §49.04(d). Understanding what it is and is not matters:

• What it enhances. It changes the offense from a Class B to a Class A misdemeanor, raising the maximum jail exposure to one year and the maximum fine to $4,000.
• What it triggers. A mandatory interlock as a condition of community supervision under Article 42A.408(c)(1), additional probation conditions, and closure of certain favorable dispositions including HB 3582 deferred adjudication, which under Article 42A.102(b)(1)(B) is available only where the alcohol concentration was under 0.15 and the defendant did not hold a commercial driver’s license or commercial learner’s permit at the time of the offense.
• What counts as the BAC. The statute looks at the analysis of a specimen of breath or blood showing an alcohol concentration of 0.15 or more “at the time the analysis was performed.” That reading is subject to the same forensic challenges as any other breath or blood test.

The 0.15 threshold is forensically contestable. Partition ratio, observation-period compliance, measurement uncertainty, GERD or other medical conditions, and test timing can all affect whether a reported reading above 0.15 accurately reflects the actual blood alcohol concentration at the time of driving. In Class A cases, every one of those issues matters more than it would on a standard Class B charge.

The Repeat-Offender Trap

A first-offense DWI is always tied, for the rest of the defendant’s life, to every subsequent alcohol-related arrest. Under Penal Code §49.09:

• DWI 2nd. A second DWI is a Class A misdemeanor, and a prior conviction of any age counts. The minimum jail exposure depends on how the case resolves, which is the part most write-ups skip. Sentenced to confinement, Penal Code 49.09(a) sets a minimum term of 30 days. Granted community supervision instead, Article 42A.401(a)(1) requires a minimum of 72 hours of continuous confinement as a condition of that supervision, rising to five days under (a)(2) where the second offense came within five years of the first, which also brings a mandatory interlock on every vehicle you own or operate. Time served as a probation condition earns no credit against a sentence if the supervision is later revoked.
• DWI 3rd or more. A third or subsequent DWI is a third-degree felony, punishable by 2 to 10 years in the Texas Department of Criminal Justice and a fine of up to $10,000.
• Intoxication Assault (§49.07) and Intoxication Manslaughter (§49.08). Prior DWI convictions can affect both charging decisions and sentencing ranges in subsequent intoxication assault and intoxication manslaughter cases.

In other words, the first DWI is not just this case. It is the baseline that every future case is measured against. That is another reason the fight on a first offense matters more than it looks. A conviction today raises the stakes on every alcohol-related incident for the rest of the defendant’s life.

Consequences That Follow You Out of Court

The criminal penalties are only one part of what a first-offense DWI actually costs. The collateral consequences are treated in detail in what a DWI does to your life, but they are worth naming briefly here because they often outweigh the courtroom consequences:

• Background checks. A DWI conviction appears on standard criminal background checks for life absent a successful non-disclosure petition.
• Employment and professional licensing. Current employment, future employment, and professional licensing across dozens of fields can all be affected.
• Commercial driving. A single DWI conviction in any vehicle triggers a one-year commercial driver’s license disqualification under federal rules. Texas goes further, and this is the part CDL holders rarely know: Transportation Code 522.081(b) imposes a one-year commercial disqualification on an ALR refusal, or on a 0.08 or higher result in a personal vehicle, with no conviction required at all. A CDL holder can beat the criminal case and still lose the commercial license on the administrative side.
• Insurance. Auto insurance rates rise sharply, SR-22 filings are commonly required, and some carriers drop the driver.
• Immigration. For non-citizens, a DWI can have serious immigration consequences that require coordination between criminal and immigration counsel. A deferred adjudication is not a way around this: federal immigration law counts it as a conviction from the day it is entered.
• Security clearances, military service, and federal employment. All can be affected by a DWI conviction, and in many cases by the arrest alone.

The jail exposure, the fine, and the interlock are the penalties you see. The insurance, the licensing, the background check, and the professional fallout are the penalties you live with.

What the State Has to Prove

To convict, the State must prove beyond a reasonable doubt that you operated a motor vehicle in a public place and that you were intoxicated. In a first DWI that case usually rests on four kinds of evidence, and each one has known weak points.

• The chemical test. A breath test on the Intoxilyzer 9000, or a blood draw analyzed at a laboratory. The number is only as reliable as the process behind it: calibration and maintenance logs, the 15-minute observation period, and operator certification on the breath side, and the draw protocol, preservative, storage, and chain of custody on the blood side.
• Field sobriety tests. The walk-and-turn, the one-leg stand, and horizontal gaze nystagmus, which is the eye-tracking test, are scored by the same officer who is already building the case, often roadside in poor light on uneven ground. These tests are voluntary in Texas, and declining them is not a crime.
• The officer’s observations. Odor, slurred speech, balance, and driving behavior, written up in the offense report. These are subjective, and they are frequently contradicted by the video.
• The video. Dash and body camera footage often tells a different story than the report. It is one of the first things we request, and it is also the first thing to disappear if nobody asks for it in time.

Are the Penalties Negotiable?

Yes, in most cases, and in more ways than defendants realize:

• Reduced charges. Obstruction of a passageway, reckless driving, and in some cases other non-intoxication offenses may be available in place of a DWI conviction. In practice a reduction is usually paired with deferred adjudication rather than a straight conviction, which is what makes the collateral-consequence difference meaningful.
• Deferred adjudication under HB 3582. Available for a first-offense DWI under 49.04, and for a first-offense BWI under 49.06, if the alcohol concentration was under 0.15 and you did not hold a commercial driver’s license or commercial learner’s permit at the time of the offense. Deferred adjudication differs from straight probation in that successful completion produces no final conviction under Texas law. It is not a clean slate: Penal Code 49.09(g) makes a completed deferred count as a prior if you are arrested again, it can never be expunged, and federal immigration and commercial driving rules treat it as a conviction.
• Reduced sentences. Lower fine, shorter probation, reduced community service, no additional jail time, interlock shortened are all negotiable.
• Pre-trial diversion in certain cases. Some counties offer diversion programs for qualifying first offenders.
• Dismissal through suppression or trial. The best possible outcome on a DWI (a dismissed case or a not-guilty verdict) is achievable in cases where the State’s evidence does not survive forensic or procedural challenge.

The leverage that produces these outcomes comes from the same place it always does: a defense that understands the law and the science, that runs the ALR hearing, that files motions where they are warranted, and that shows the prosecutor that the case will be harder to win than the next one on the docket.

No lawyer can promise a result, and you should be wary of one who does. What can be said is that a breath or blood number is not a verdict. First cases with a reading over the limit have been dismissed and won because the stop, the testing, or the timing did not hold up.

How Long Does a First DWI Case Take?

Most first DWI cases take roughly 6 to 18 months from arrest to resolution, and a contested case built on blood evidence can run longer than a year. The case moves through arrest and bond, then the ALR hearing within weeks, then a pretrial phase of discovery, video and lab-record production, and any motions to suppress, before a plea, a dismissal, or a trial.

Slower is often better. Pulling the breath or blood records and litigating the stop takes time, and that work is what produces dismissals and reductions. We keep clients updated at each step so the wait never feels like silence.

If weeks have passed and nothing has been filed, that is usually the laboratory queue, not a dropped case. No charges filed yet explains what the silence means, and what you can do while the case is pending covers the work that helps in the meantime.

How Much Does a First DWI Defense Cost?

The fee depends on the county, the evidence, whether the case involves blood that needs independent review, and whether it resolves before trial. A breath case that pleads early and a contested blood case that goes to a hearing are different engagements.

We quote a flat fee after a free consultation, so the investment is known up front. Weigh it against what a conviction costs over time: the fine, the Superfine, years of higher insurance premiums, and a record that raises the stakes on any future charge.

Before you sign anything, know what a DWI legal fee includes and what it does not. If paying all at once is the obstacle, payment plans and financing are common in DWI practice.

Do You Really Need a Lawyer for a First DWI?

A first DWI feels minor until you see what a conviction actually does: a permanent criminal record, a license suspension, the Superfine, years of higher insurance, and a predicate that turns any future DWI into a worse one. Pleading guilty at the first setting locks all of that in, based on evidence that nobody has tested.

You can represent yourself or take a quick plea. But a first DWI is a forensic case. The value of counsel here is the ability to read the laboratory data, litigate the stop, and protect both the record and future eligibility for non-disclosure. The cheapest path through a first DWI is rarely the least expensive one over time.

If you do hire, hire carefully. Start with the questions to ask a DWI lawyer and the warning signs that a firm is not built for this kind of case.

Where First DWI Cases Are Heard in North and Central Texas

First DWI cases are misdemeanors, so they are heard in the county courts at law. Dallas County cases run through the county criminal courts at the Frank Crowley Courts Building, where blood is typically analyzed by SWIFS or a DPS laboratory. Tarrant County cases are heard at the Tim Curry Criminal Justice Center in Fort Worth. Collin, Denton, Rockwall, and McLennan County cases are heard in their respective county courts.

The same is true in the suburbs and in Central Texas. See our Plano, Carrollton, and Waco DWI pages for the courts that handle those arrests.

We appear in these courthouses every week. See our DWI enforcement across North Texas for what to expect at each one, from parking to docket procedure.

Whether your lawyer needs an office near that courthouse is a fair question. Does your DWI lawyer need to be local answers it.

The Bottom Line

A first-offense DWI in Texas is a Class B misdemeanor (Class A if the BAC is 0.15 or higher) carrying jail exposure, fines, license suspension, probation conditions, and ignition interlock requirements, layered on top of collateral consequences that follow the defendant long after the sentence ends. The penalties on paper are only the starting point. What actually happens depends on the strength of the State’s evidence, the leverage the defense creates, and the disposition ultimately negotiated or won. A first DWI is not the end of the world, but it is not something to walk into alone.

First DWI FAQs

Should I have refused the breath or blood test?

Refusing does not make the case disappear. A refusal still triggers the 15-day window to request an ALR hearing, and in most counties an officer can obtain a warrant and draw blood anyway. But a refusal also denies the State an easy number, and it can shift the case onto the officer’s subjective observations, which are easier to challenge. What you did is now a fact to work with, not a verdict.

Will my car insurance go up, and what is an SR-22?

Usually yes. After a DWI suspension, Texas requires an SR-22, which is a certificate of financial responsibility that an insurer files with the state on your behalf. It is often best obtained from a carrier that specializes in them rather than from your existing insurer. Premiums commonly stay elevated for several years. Avoiding the conviction is the most direct way to limit that cost.

Can I travel to Canada with a DWI?

Canada can treat a DWI as serious criminality and deny entry, even on a first offense and even years later. If you travel to Canada for work or family, raise it early so it can be weighed in how the case is resolved and, if necessary, so you can be referred to a Canadian immigration attorney.

What if this is my first Texas DWI but I have a prior from another state?

An out-of-state DWI or DUI can count as a prior for enhancement in Texas, which can turn what looks like a first offense into a second. Tell your lawyer about any alcohol-related driving offense anywhere, so there are no surprises later.

Is jail time likely on a first DWI?

For a typical first DWI with no crash and no unusually high BAC, probation rather than jail is the common outcome, though a short jail term can be imposed as a condition of probation in some courts. Aggravating facts change that, which is why the details of the stop and the test matter.

DWI Defense at Deandra Grant Law

Deandra Grant Law defends DWI and intoxication-offense cases across North and Central Texas: Dallas, Fort Worth, Plano, McKinney, Frisco, Allen, Lewisville, Denton, Rockwall, and Waco. We handle first-offense DWI cases the same way we handle repeat-offender and felony cases with a full forensic evaluation of the evidence, a full collateral-consequence review for the specific client, and a clear plan for the ALR hearing, the motion practice, and the resolution. Our team includes an ACS-CHAL Forensic Lawyer-Scientist with a Master of Science in Pharmaceutical Science and a Graduate Certificate in Forensic Toxicology.

If you have been arrested for a first-offense DWI in Texas, call Deandra Grant Law at (214) 225-7117 or visit texasdwisite.com to schedule a confidential consultation. And do not forget that the 15-day ALR deadline runs from the date of service of the notice of suspension, independent of any criminal court setting.

Have a DWI question you want answered in this series? Submit it at texasdwisite.com. You might see it featured in a future Ask Deandra post.