Will I Go to Jail for a First DWI in San Antonio?

The Direct Answer: Jail Is Possible But Rarely the First Outcome in Bexar County

For a first-offense DWI in San Antonio, the statutory law says you face 72 hours to 180 days in the Bexar County Jail. But the statutory range and the actual outcome in most first-offense cases are very different things. Most first-time defendants in Bexar County who are represented by an experienced DWI attorney do not serve additional jail time beyond any time spent at arrest. The Bexar County District Attorney’s office will typically offer probation on a first offense when the defendant has no prior criminal history. A skilled defense attorney’s goal is not to minimize the jail exposure on a first DWI. The goal is to get the case dismissed entirely, because conviction — not jail — is the real threat.

The Penalty Range for a First DWI in Texas

A first-offense DWI in Texas under Penal Code §49.04 is a Class B misdemeanor. The full statutory range is:

• Minimum: 72 hours in Bexar County Jail (mandatory minimum)
• Maximum: 180 days in Bexar County Jail
• Fine: Up to $2,000
• License suspension: 90 days to 1 year through the ALR process
• DPS surcharges: $1,000 per year for 3 years ($3,000 total)

If your BAC was 0.15 or above, the charge is elevated to a Class A misdemeanor — with a higher penalty range: up to 1 year in jail, a $4,000 fine, and mandatory ignition interlock device on any conviction.

The 72-hour mandatory minimum is statutory, but it is almost universally satisfied by time already served at arrest and processing in Bexar County. Most first-time defendants who are represented do not serve additional custody time beyond the initial booking.

What Bexar County Actually Does With First-Offense DWI Cases

The Bexar County District Attorney’s office prosecutes all DWI cases — misdemeanor and felony — at the Cadena-Reeves Justice Center, 300 Dolorosa Street, San Antonio TX 78205. The office has experienced prosecutors who actively pursue DWI cases through trial when defendants are unrepresented. Here is what typically happens on a first offense:

Without representation: The Bexar County DA’s office presents a plea offer. Most unrepresented defendants accept it. The offer typically involves a plea to DWI with a period of probation, fines, alcohol education, a victim impact panel, and community service. The conviction enters permanently the moment the judge accepts the plea — there is no deferred adjudication for DWI in Texas at any charge level.

With experienced representation: A San Antonio DWI attorney evaluates the traffic stop for Fourth Amendment violations, examines the Intoxilyzer 9000 maintenance records and BAC evidence, reviews the SFST administration on video, and files the ALR hearing request before the 15-day deadline. Cases with suppression exposure — a stop lacking reasonable suspicion, a breath test with maintenance problems, an SFST administered outside protocol — frequently result in dismissal rather than a plea. A dismissal means no conviction, no permanent record, and expungement eligibility under Texas Chapter 55.

No Deferred Adjudication for DWI in Texas — This Is the Real Issue

Many people asking “will I go to jail?” are focused on the wrong question. The real question is: will you get convicted? Here is why it matters more than jail time:

Texas law explicitly prohibits deferred adjudication for DWI under Code of Criminal Procedure Art. 42A.102. For virtually every other criminal charge in Texas — assault, drug possession, theft — a defendant can complete probation and have the charge dismissed without a conviction. For DWI, that option does not exist. A DWI plea is a permanent conviction, immediately and irrevocably. It:

• Appears on every background check for life — cannot be sealed or expunged after conviction
• Enhances every future DWI you ever face with no lookback period
• Triggers Texas DPS surcharges of $1,000–$2,000 per year for three years
• Requires SR-22 insurance, substantially increasing your auto insurance premiums
• Can disqualify commercial drivers from operating a CMV for 1 year
• Can trigger professional licensing board reviews in nursing, law, medicine, and teaching

Compared to all of that, the question of whether you spend additional days in jail becomes secondary. Learn more about the full consequences on our DWI conviction consequences page.

Factors That Affect Jail Exposure on a First San Antonio DWI

BAC of 0.15 or above. This triggers a Class A misdemeanor enhancement with a higher maximum and mandatory ignition interlock. The Bexar County DA’s office treats high-BAC cases more seriously than cases near the 0.08 threshold.

An accident. If the arrest followed a crash — even without injuries — the case typically draws more prosecutorial attention. If there was serious bodily injury, the case may be charged as intoxication assault, a third-degree felony.

A child in the vehicle. DWI with a child passenger under 15 is a state jail felony under Penal Code §49.045, regardless of first offense.

Prior criminal history. Even without a prior DWI, other criminal convictions on your record affect how the DA’s office evaluates the file.

The 15-Day ALR Deadline — Starts the Day of Your Arrest

The most time-sensitive issue after a first San Antonio DWI arrest is the Administrative License Revocation deadline. When the officer issued the DIC-25 notice at the scene, the clock started. You have exactly 15 days from that date to request an ALR hearing with the Texas Department of Public Safety.

Miss the deadline and your license is automatically suspended at day 40 — 90 days for a first failed breath test, 180 days for a refusal. No extension exists. Every San Antonio DWI attorney at The Hull Firm files the ALR request the same day you retain us. Learn more about first-time DWI defense in San Antonio.

How to Avoid a First DWI Conviction Entirely

The path to avoiding both jail and a permanent conviction runs through the defense of the case itself. Here is where first DWI cases in San Antonio are won:

The traffic stop. If SAPD’s stop on IH-35, IH-10, Loop 1604, or the River Walk corridor lacked legal justification, the entire DWI investigation is suppressible under Art. 38.23. No valid stop means no case.

The field sobriety tests. HGN, Walk and Turn, and One Leg Stand must be administered in strict compliance with NHTSA protocol. Deviations in instruction and SAPD officer certification records are all challengeable.

The Intoxilyzer 9000 result. SAPD uses the Intoxilyzer 9000. The specific machine used in your test has a maintenance log, calibration record, and error log — all obtainable through open records. A maintenance gap or lapsed operator certification can support suppression of the breath test result.

Blood draw evidence. Blood draws in Bexar County DWI cases are analyzed at the Bexar County Crime Laboratory. The chain of custody from collection through lab analysis must be unbroken. Preservation failures can cause in-vitro fermentation, producing additional ethanol not present at the time of the draw.

What Happens if the Case Cannot Be Dismissed

When the evidence does not support dismissal, probation — not additional jail — is the most common outcome for a represented first-time defendant in Bexar County. Probation on a first DWI typically involves a period of community supervision, a fine, DWI education, victim impact panel attendance, community service, and possible ignition interlock. The conviction still enters permanently. The 15-day ALR clock, the DPS surcharges, and the permanent record consequences all apply regardless of whether any additional jail time is served.