A Class A DWI in Texas is a standard DWI that’s been elevated by something the state believes it can prove. A second DWI conviction, a BAC reading of 0.15 or higher on a first offense, or certain other aggravating facts move the charge from a Class B to a Class A misdemeanor.
The Class A threshold changes more than the numbers. Deferred adjudication is off the table, probation conditions are stricter, ignition interlock is mandatory on community supervision, and the minimum jail term for a second DWI is 30 days. Prosecutors approach these cases with more leverage and less flexibility than they do a standard Class B, and the room for negotiation narrows.
RJ Harber is a Dallas DWI defense attorney and former prosecutor with over 15 years of experience handling Class A DWI cases. If you’ve been charged with a Class A DWI, contact us today for a free consultation.
Class A Misdemeanor DWI Under Texas Law
First DWI With a BAC of 0.15 or Higher
Texas Penal Code §49.04(b) defines driving while intoxicated as a Class B misdemeanor. That changes to a Class A when the analysis of a blood, breath, or urine specimen shows an alcohol concentration of 0.15 or more at the time the analysis was performed. The legal threshold for intoxication in Texas is 0.08, so the 0.15 enhancement triggers at roughly twice that level.
Second DWI Offense
Under §49.09(a), a standard DWI becomes a Class A misdemeanor when the state proves one prior conviction for an offense relating to the operation of a motor vehicle while intoxicated. The qualifying prior does not have to be a Texas DWI.
A prior deferred adjudication under Article 42A.102 counts as a conviction for enhancement purposes under §49.09(g), so what looked like a clean record in one sense can still surface as a predicate offense.
Penalties for a Class A Misdemeanor DWI
Jail Time and Fines
Under Texas Penal Code §12.21, a Class A misdemeanor carries a fine of up to $4,000, confinement in jail for a term not to exceed one year, or both. That ceiling is the same whether the case arrived in the Class A bracket through the 0.15-or-higher pathway or through one prior DWI-type conviction.
For a 0.15-or-higher first offense, deferred adjudication is off the table, and an ignition interlock device is mandatory. The conviction stays on the record after probation, and the interlock travels with the defendant for the duration of supervision.
Mandatory Minimum Confinement for Second-Offense DWI
If you’re convicted of DWI a second time in Texas, you have to spend at least 30 days locked up. But that doesn’t mean you’ll spend a month in jail. Judges in Texas often put people on probation instead, and that’s still an option here.
If you do get probation, the judge has to order you to spend at least 72 hours straight in the county jail as a condition of that probation. If your case involves certain aggravating factors, that jumps to five days.
Deferred adjudication is also unavailable. The ignition interlock requirement runs longer on a second-offense Class A. If a person commits a second or subsequent DWI within 5 years of a prior offense, the ignition interlock device must remain installed for at least 1 year after the driver’s license suspension ends. The same requirement applies as a condition of community supervision.
Driver’s License Suspension After a Class A DWI
A Class A DWI conviction triggers a driver’s license suspension ordered by the criminal court. This is separate from any administrative license suspension the Department of Public Safety may have already imposed when the driver refused or failed a chemical test at the time of arrest. The two suspensions come from different laws and are tracked separately by DPS.
The length of the court-ordered suspension depends on what made the case a Class A offense. If the conviction is based on a blood or breath alcohol concentration of 0.15 or higher, the suspension runs anywhere from 90 days to one year, with the judge choosing both the start date and the length within that range. For a second DWI conviction, the range jumps to 180 days to two years. And if that second offense happened within five years of the first, the minimum suspension is bumped up to one full year.
Drivers in this situation can often apply for an occupational license, which doesn’t shorten the suspension but does allow limited driving, typically for work, school, or essential household duties, during the suspension period. The judge sets the conditions, and an ignition interlock requirement usually comes attached to any occupational license that’s granted.
Defenses to a Class A Misdemeanor DWI
Most of the defense work on a Class A case targets the specific element that lifted the charge into the Class A. On a 0.15-or-higher first offense, that’s the chemical analysis itself: calibration records on the breath instrument, the qualifications of the analyst, blood-draw protocol and chain of custody, possible contamination during sample handling, and the timing gap between the stop and the test. A successful challenge that knocks the result below 0.15, or excludes the result entirely, can drop the case back to a Class B.
On a second-offense Class A, the defense typically focuses on the prior. Identity, the validity of the prior plea or judgment, and the use of deferred adjudication as a predicate are all potential angles. If the predicate prior falls out, the second-offense enhancement typically falls with it.
Every DWI carries the standard procedural challenges: the lawfulness of the traffic stop, probable cause for the arrest, the administration and scoring of field sobriety tests, and any statement made before Miranda warnings were given. Suppressing the stop, the arrest, or a piece of evidence may not end the case, but it can change the prosecution’s leverage.
Contact a Dallas Class A DWI Attorney
If you’re facing a Class A DWI charge, the time to start building a defense is now. Early work on the chemical analysis or the predicate prior gives the case the best chance at a different outcome.
The Law Offices of RJ Harber has handled Class A DWI cases in Dallas for over fifteen years, and we build each defense around the specific element that pulled the charge into the Class A bracket. Contact us for a free consultation.