Being arrested for driving under the influence for the first time can be overwhelming. You may be concerned about losing your driver's license, going to jail, paying thousands of dollars in fines, or having a criminal conviction hinder you for years.

A first-time DUI in California is charged as a misdemeanor when there are no injuries or other circumstances that elevate the offense. However, “first offense” does not mean insignificant. A conviction can result in probation, fines and assessments, DUI school, driver's license consequences, possible jail time, increased insurance costs, and other long-term repercussions.

Just as importantly, an arrest is not the same as a conviction. DUI cases can involve questions about the legality of the traffic stop, field sobriety testing, breath or blood test accuracy, police procedures, and whether the prosecution can prove beyond a reasonable doubt that the driver violated California's DUI laws.

Quick Takeaways

·         A standard first-time California DUI is generally prosecuted as a misdemeanor.

·         A conviction commonly results in three to five years of informal probation, a base fine of $390 to $1,000, DUI school, and driver's license consequences. California law establishes the $390-to-$1,000 base-fine range, while penalty assessments and other costs can make the actual financial impact substantially higher.

·         Most first offenders with a BAC below 0.20% who receive probation are ordered to complete a three-month DUI program consisting of at least 30 hours. A BAC of 0.20% or higher can trigger a longer program.

·         A first DUI arrest can trigger a four-month DMV Administrative Per Se suspension, while a DUI conviction generally results in a separate six-month license suspension.

·         You have only 10 days after receiving the suspension notice to request a DMV hearing and challenge the administrative suspension.

·         Eligible first offenders may be able to continue driving through an ignition interlock device (IID) restricted license or an employment/treatment restriction.

·         Common DUI defense strategies can include challenging the legality of the traffic stop, the reliability of field sobriety tests, breath-testing procedures, blood-test evidence, and whether BAC was actually at or above the legal limit at the time the person was driving.

·         The DMV case and criminal court case are separate proceedings, so successfully addressing one does not necessarily resolve the other.

What Is Considered a First-Time DUI in California?

California Vehicle Code Section 23152 makes it unlawful to drive while under the influence of alcohol and/or drugs. It also separately prohibits driving with a blood alcohol concentration of 0.08% or higher for most adult noncommercial drivers.

California DUI offenses are “priorable,” meaning previous qualifying DUI and certain related convictions within the applicable 10-year look back period can increase the penalties for a subsequent offense.

For purposes of this article, a standard first DUI generally refers to a driver who does not have a qualifying prior DUI offense within the preceding 10 years and whose case does not involve circumstances that could result in more serious charges, such as an injury or death.

What Happens After Your First DUI Arrest?

One of the most important things to understand about a California DUI is that the arrest can start two separate legal proceedings at nearly the same time:

1.      A DMV administrative case involving your driving privileges; and

2.      A criminal case prosecuted through the California court system.

These cases are related, but they are not the same. The DMV decides administrative issues involving your driver's license. A criminal court decides whether you are guilty of DUI criminal charges and, if so, what sentence should be imposed.

Arrest and Temporary Driver's License

Following a qualifying DUI arrest, an officer may confiscate your California driver's license and provide you with a notice of suspension and temporary driving license.

Do not assume that you have until your court date to deal with the DMV.

California DMV provides only 10 days from receipt of the suspension or revocation order to request an administrative hearing. The purpose of that hearing is to contest whether the DMV's proposed suspension is justified.

If you fail to request the hearing on time, you can lose an important opportunity to challenge the administrative suspension of your license.

The DMV Hearing Is Different From Your Criminal DUI Case

For a driver age 21 or older whose chemical test shows a BAC of 0.08% or greater, a first Administrative Per Se offense typically results in a four-month license suspension.

At a DMV hearing, issues can include whether:

·         The officer had reasonable cause to believe you were driving under the influence;

·         You were lawfully arrested;

·         Your BAC was 0.08% or greater; or

·         A legally valid chemical-test refusal occurred, when refusal is alleged.

Winning the DMV hearing can prevent that particular administrative suspension. However, it does not result in dismissal of the criminal DUI case.

Likewise, what happens in criminal court does not necessarily eliminate the need to address the DMV proceeding. California DMV specifically explains that its administrative action is independent of criminal penalties imposed by the court.  However, if someone is acquitted at court of driving with an alcohol level of .08% or above this will have the added benefit of causing the DMV to set-aside your APS case.

What Are the Penalties for a First-Time DUI in California?

Every DUI sentence depends on the individual circumstances, including BAC level, the facts surrounding the arrest, local sentencing practices, and the presence of aggravating factors.

For a typical first misdemeanor DUI conviction, however, several consequences are common.

Three to Five Years of Informal Probation

California law provides that when probation is granted for a DUI conviction, the probationary period is generally not less than three years and not more than five years.

This is generally informal, or summary, probation, meaning you ordinarily do not report to a probation officer in the same way someone on formal felony probation might.

DUI probation nevertheless carries important conditions. California law requires conditions including that the driver:

·         Not drive with any measurable amount of alcohol in their blood;

·         Submit to required chemical testing following a subsequent stop and/or arrest for DUI; and

·         Not commit another criminal offense.

Violating probation can create new legal problems and expose a person to additional penalties.

Fines and Penalty Assessments

The statutory base fine for a first DUI is $390 to $1,000.

That number can be misleading if viewed by itself. California adds various mandatory penalty assessments and fees to criminal fines, and other DUI-related expenses can include DUI school, DMV fees, insurance costs, IID costs, and other court-ordered programs.

A 2025 California Senate committee analysis calculated that penalty assessments alone could raise a $390 statutory fine to approximately $1,674 and a $1,000 fine to approximately $4,140 under the assessments evaluated in that analysis, before adding DUI school and other costs.

The exact total varies by case and jurisdiction, so someone facing a DUI should not assume that the $390 minimum base fine represents the total cost of a conviction.

DUI School

For most standard first-offense cases involving a BAC below 0.20%, California requires a licensed three-month DUI program with at least 30 hours of program activities when probation is granted.

If a first offender's BAC was 0.20% or higher, California law generally calls for at least a nine-month program containing at least 60 hours of activities. The longer program may also apply if you refused a chemical test.

Successful enrollment and completion can also be important for restoring full driving privileges.

Possible Jail Time

Jail is legally possible even for a first DUI.

Vehicle Code Section 23536 establishes a sentencing range reaching up to six months in county jail for a first violation. When probation is granted under Vehicle Code Section 23538, the court may impose county jail as a probation condition for between 48 hours and six months.

In practice, many first-offense cases are resolved without lengthy actual incarceration, particularly when there are no aggravating circumstances. Sentencing practices, however, can vary by county and by the facts of the case.

Will You Lose Your Driver's License After a First DUI?

A first DUI can create more than one license consequence.

As noted above, a qualifying arrest can result in a four-month Administrative Per Se suspension through the DMV. A later first DUI conviction generally results in a six-month suspension.

The two actions may overlap in some circumstances, but they should not simply be treated as the same suspension.

Fortunately, suspension does not always mean being completely unable to drive.

Can You Drive With an Ignition Interlock Device After a First DUI?

California's statewide IID program currently runs through December 31, 2032.

For a first-time, non-injury alcohol DUI, an IID is not mandatory unless the court orders one. However, qualifying first offenders can generally choose to install an IID and apply for an IID-restricted license.

With a valid IID restriction, the driver can drive anywhere as long as the vehicle being operated is properly equipped with the device.

A qualifying first offender may alternatively choose an employment/treatment restriction that permits driving to, from, and during employment and to and from the required DUI program.

Obtaining restricted driving privileges commonly requires steps such as:

·         Enrolling in the required DUI program;

·         Filing an SR-22 proof of financial responsibility;

·         Paying applicable DMV fees; and

·         Installing an approved IID and submitting proof of installation when seeking the IID option.

What If You Refused a Breath or Blood Test?

A chemical-test refusal can substantially change the driver's license consequences.

For a driver age 21 or older, California DMV states that a first refusal or failure to complete a required post-arrest chemical test results in a one-year driver's license suspension with no possibility for a restricted license.

Whether a lawful refusal actually occurred can itself be contested in some cases. Questions can arise regarding whether the driver was properly advised of the consequences, whether the request complied with applicable procedures, and whether a medical or other factual issue affected the driver's ability to complete the test.

What Is the Criminal Court Process After a First DUI?

While the DMV case moves forward, the criminal case proceeds separately.

Arraignment

The arraignment is the first criminal court appearance. The charges are formally presented, and the defendant has an opportunity to enter a plea.

Discovery and Investigation

The defense can obtain and examine evidence such as:

·         Police reports;

·         Body-camera or dash-camera footage;

·         Breath-test records;

·         Blood-test documentation;

·         Calibration and maintenance records;

·         Field sobriety test evidence; and

·         Witness statements.

This stage can be extremely important because a DUI case that appears straightforward on the initial police report may look different when the underlying evidence is closely reviewed.

Pretrial Motions and Negotiations

A DUI attorney may file motions challenging certain evidence or seek to exclude evidence that was obtained in violation of your constitutional rights.

The prosecution and defense may also discuss a negotiated resolution. Depending on the evidence and circumstances, that could potentially include a reduction to an offense such as a “wet reckless.” A reduced charge must be evaluated according to the facts of the particular case.

Trial

If the case cannot be resolved to your satisfaction, you may choose to contest the charge at trial.  In that case, the prosecution must attempt to prove all elements of the DUI offense beyond a reasonable doubt to a judge or jury.

What Are Common Defense Options for a First-Time California DUI?

The appropriate strategy depends on the facts, chemical-testing evidence, police conduct, and other circumstances.

Several issues are commonly investigated.

Challenging the Traffic Stop

Police need a lawful reason to stop a vehicle, subject to certain exceptions such as properly conducted DUI checkpoints.

If the officer lacked reasonable suspicion or otherwise violated the driver's constitutional rights, the defense will seek to suppress evidence obtained as a result of the unlawful stop.

Challenging Whether the Driver Was Actually Under the Influence

California Vehicle Code Section 23152(a) prohibits driving while under the influence, while Section 23152(b) separately prohibits driving with a BAC of 0.08% or greater.

Observations such as red eyes, an odor of alcohol, or poor performance on field sobriety exercises may be used by prosecutors, but they do not always prove impairment.

Fatigue, nervousness, footwear, injuries, road conditions, lighting, balance problems, and other circumstances can affect roadside observations and field sobriety testing.

Challenging Breath-Test Results

Breath-testing equipment and procedures may be examined to determine whether:

·         The device was properly maintained and calibrated;

·         Required testing procedures were followed;

·         The operator was appropriately trained;

·         Mouth alcohol or other circumstances could have affected the sample; or

·         The reported result reliably reflects the driver's BAC at the time of driving.

The “Rising BAC” Issue

Alcohol does not instantly enter the bloodstream. Depending on when drinks were consumed and when chemical testing occurred, someone's BAC can continue rising after they stop driving.

California law provides a rebuttable presumption concerning a BAC of 0.08% or more when a qualifying chemical test is performed within three hours after driving. Because it is a rebuttable presumption, the timing and circumstances of alcohol absorption matter.

Challenging Blood-Test Evidence

Blood evidence can also be challenged.

Potential issues may involve the manner in which the sample was collected, preserved, stored, transported, or analyzed. Failure to properly mix the blood with the correct amounts of preservative and anticoagulant, lack of proper refrigeration, and errors made by the phlebotomist can all affect the reliability of a blood test.

Challenging the Evidence of Driving

The prosecution must prove that the defendant actually drove the vehicle.

In some cases - such as when police arrive after an accident or find someone in or near a stationary vehicle - there may be legitimate questions about who was driving or when the alleged driving occurred.

Aggravating Factors Can Increase the Consequences of a First DUI

The penalties discussed above generally describe a standard first-time misdemeanor DUI. Consequences can become significantly more serious when aggravating circumstances are alleged.

Examples can include:

·         An accident resulting in injury;

·         A particularly high BAC;

·         Chemical-test refusal;

·         Excessive speeding;

·         A child passenger;

·         Driving on a suspended license; or

·         Other criminal allegations arising from the same incident.

A DUI involving injury, for example, can be charged under different statutory provisions and carries substantially different penalties than the typical non-injury first offense.

Is a First DUI Conviction Inevitable After an Arrest?

No.

An arrest reflects an officer's determination that there was probable cause to believe an offense occurred. It does not decide guilt.

The prosecution still has the burden of proving its criminal case beyond a reasonable doubt. The DMV also has its own issues to establish if the driver timely contests the Administrative Per Se suspension.

Possible outcomes vary widely. Depending on the evidence, a case might result in a DUI conviction, negotiated reduction, dismissal, acquittal at trial, or another resolution.

That is why evaluating the evidence early can be especially important.

Talk to a California DUI Defense Attorney About a First-Offense DUI

A first DUI can have consequences that last well beyond the night of the arrest. Between the 10-day DMV deadline, potential license suspension, criminal court proceedings, probation, DUI school, fines, insurance consequences, and possible IID requirements, there are several issues that may need immediate attention.

The Crawford Law Firm, Inc. focuses on DUI and criminal defense and maintains offices in Monterey, Santa Cruz, and Salinas, California.

If you have been arrested for your first DUI, speaking with an attorney early can help you understand the criminal charges, preserve your right to challenge the DMV suspension, evaluate weaknesses in the prosecution's evidence, and determine the defense strategy that makes sense for your circumstances.

Contact The Crawford Law Firm, Inc. to discuss your first-time California DUI case and learn more about the options available to you.