DUI Laws in California: Penalties, BAC Limits & License Suspension

In California, the offense is called DUI — driving under the influence — charged under Vehicle Code Section 23152. If you were arrested, two numbers matter immediately: the standard 0.08% blood alcohol concentration (BAC) per se limit, and a 10-day deadline to request a DMV hearing or your license gets suspended automatically, whether or not you're ever convicted in court. Miss that window and you lose your right to contest the suspension administratively. Everything below explains what these numbers mean and what to do next.

What California calls this offense

California law uses the single term "DUI" for both alcohol and drug impairment. Vehicle Code 23152(b) covers driving with a BAC of 0.08% or more; 23152(a) covers driving "under the influence" of alcohol or drugs even below 0.08% if your driving is impaired; and 23152(f) and (g) cover drugs, including some prescription and over-the-counter medications. You will not see the abbreviations DWI, OWI, OUI, OVI, or DUII used in California statutes — those are other states' terms for the same basic offense.

BAC limits in California

The 0.08% per se limit for adult drivers of ordinary vehicles is a nationwide standard, not unique to California. California layers additional limits on top of it:

• Commercial driver's license (CDL) holders: 0.04% while operating a commercial vehicle (Vehicle Code 23152(d)).
• Drivers under 21 — zero tolerance: California's "zero tolerance" law (Vehicle Code 23136) triggers an automatic one-year civil license suspension for any driver under 21 found driving with a BAC of 0.01% or more — this is a license action, not a criminal charge. A separate infraction, Vehicle Code 23140, applies to under-21 drivers with a BAC between roughly 0.05% and 0.07%. At 0.08% or above, a driver under 21 is prosecuted as an adult DUI under 23152.
• Enhanced ("excessive BAC") penalties: California does not create a separate crime for high BAC, but Vehicle Code 23578 requires the court to treat a BAC of 0.15% or higher as a sentencing factor that increases fines and program requirements at sentencing.

Because these thresholds are set in statute and occasionally amended, confirm the current figures with the California DMV or California courts before relying on them for a specific case.

Implied consent and refusing a chemical test

By driving in California, you have already agreed — under the state's "implied consent" law — to take a breath or blood test if lawfully arrested for DUI. Refusing does not avoid consequences; it adds a separate, automatic license penalty on top of anything that happens in the criminal case, and the refusal itself can be used as evidence against you in court.

Under Vehicle Code 13353, the license consequences for refusing are:

• First refusal: one-year suspension, with no restricted license available during that period.
• Second refusal within 10 years: two-year revocation.
• Third or subsequent refusal within 10 years: three-year revocation.

A refusal can also add mandatory jail time onto a subsequent DUI conviction. If you already refused a test, tell a California-licensed defense attorney immediately — the deadlines below still apply and move just as fast.

The DMV's Administrative Per Se suspension — your 10-day deadline

This is the single most time-critical fact in this article. Separate from — and faster than — the criminal court case, the California Department of Motor Vehicles (DMV) can suspend your license through its "Administrative Per Se" (APS) process based solely on the arresting officer's report that you drove with a BAC of 0.08% or more (or refused testing). This happens automatically unless you act.

You (or your attorney) generally have 10 calendar days from the date you receive the suspension notice (typically given at the time of arrest) to contact a DMV Driver Safety Office and request an APS hearing. If you don't request the hearing within that window, your license is suspended by default — no hearing, no chance to challenge it administratively. This 10-day clock is separate from, and runs alongside, any criminal court deadlines, so acting quickly matters even if you're waiting to hear from a prosecutor or haven't been arraigned yet. Confirm the exact procedure and current deadline directly with the DMV, since administrative rules can change.

First-offense penalties

For a first DUI in California, expect exposure across three separate tracks — DMV administrative action, court-ordered penalties on conviction, and a possible license-restriction/interlock path — and the specifics of each can change, so verify current numbers with the DMV or a local defense attorney rather than relying on any single source, including this one.

• License suspension: A first-offense APS action for a failed chemical test (driver 21 or older, non-injury) has historically run about four months administratively; a first-offense conviction in court can carry its own suspension period. The two can overlap or run separately depending on your circumstances — ask the DMV how they interact in your case.
• Ignition interlock device (IID): California law changed effective 2019 to give many first-time, non-injury DUI offenders a choice: install an IID for a set period to keep driving with fewer restrictions, or apply for a more limited restricted license without a device. IID installation is generally mandatory in first-offense cases that involved injury and in repeat-offense cases. Whether IID is required, optional, or court-ordered in your case depends on the specifics of the arrest and any court order — do not assume either path applies without confirming with the DMV or your attorney.
• Jail and fines: A first DUI is typically charged as a misdemeanor with county jail exposure measured in months rather than years, and statutory fines that are set in a base range before mandatory penalty assessments — which can multiply the amount actually owed several times over. Do not rely on any specific dollar figure or day count without checking the current statute or asking the court; these numbers are adjusted and interpreted differently case to case.

The 10-year lookback period

California counts a prior DUI, DUI-related "wet reckless" plea, or DUI-causing-injury conviction as a "prior" for enhancement purposes if it falls within 10 years of the current offense. That 10-year window is generally measured from the date of the earlier offense to the date of the new one — not from the sentencing or conviction date. A second DUI within that 10-year window carries substantially longer suspension, probation, and program requirements than a first offense; a third pushes those consequences further.

Felony DUI in California

Most first, second, and third DUIs in California are charged as misdemeanors. A DUI can be charged as a felony in situations including:

• A fourth DUI (or qualifying prior) within 10 years under Vehicle Code 23550.
• Any DUI that causes injury to another person under Vehicle Code 23153, which can be filed as a misdemeanor or a felony depending on the severity of the injury and your record.
• A DUI after a prior felony DUI conviction (or a prior vehicular manslaughter while intoxicated) under Vehicle Code 23550.5 — a new DUI in that situation can be eligible for felony filing regardless of injury.
• A DUI causing a death, which can be charged well beyond ordinary DUI statutes, up to vehicular manslaughter or, in cases involving a documented prior DUI and an established "Watson advisement" of the risks, second-degree murder.

Having a child passenger doesn't by itself create a felony, but Vehicle Code 23572 adds extra mandatory jail time on top of whatever else you're facing when a minor was in the vehicle. Because felony charging decisions depend heavily on the specific facts and your criminal history, this is an area where you need a lawyer reviewing your actual record — not a general guide.

What to do after a DUI arrest in California

1. Note the date of arrest immediately. Your 10-day window to request a DMV Administrative Per Se hearing starts running right away — mark it on a calendar the same day, even before you've hired a lawyer.
2. Call a California DMV Driver Safety Office (or have an attorney do it) to request the APS hearing before the 10 days run out. This is the single step most people miss, and missing it means an automatic suspension with no administrative appeal.
3. Read every piece of paper the officer gave you — the arrest report, any temporary license/notice of suspension, and court date, if one was set. These documents typically state the deadlines that apply to your case.
4. Contact a California criminal defense attorney as soon as possible — ideally before the 10-day DMV deadline, since many attorneys handle the DMV hearing request as their first action.
5. Do not discuss the details of the stop or testing with anyone except your attorney, including on social media or with friends who might be asked about it later.
6. Confirm your court date and any pretrial requirements (such as an arraignment date) directly with the court — missing a criminal court date creates separate, additional problems on top of the DMV timeline.
7. Ask your attorney about interlock and restricted-license options specific to your situation before assuming you know which path applies.

This article is general legal information about California law, not legal advice for your situation — confirm current deadlines, limits, and penalties with the California DMV or a California-licensed defense attorney before you act.