California Vehicle Code 23152 is the state’s core DUI statute. It makes it a crime to drive while impaired by alcohol, by drugs, or by a combination of the two, and it sets a blood alcohol concentration limit of 0.08% for most drivers. A conviction sets two processes in motion at once: a criminal case in court that can bring jail, fines, and a mandatory DUI education program, and a separate DMV action that suspends your license on its own timeline. Penalties climb sharply with each new offense inside a 10-year window, and a fourth offense can be charged as a felony.
What Section 23152 Prohibits
The statute is not one offense but several, and prosecutors often file more than one for the same arrest. The two most common charges are:
- Section 23152(a) — driving under the influence of alcohol. This is the subjective standard. A prosecutor can win a conviction even if your BAC came in below 0.08%, using evidence like erratic driving, slurred speech, or poor performance on field sobriety tests.
- Section 23152(b) — driving with a BAC of 0.08% or higher. This is the “per se” offense. The prosecution does not have to prove you were actually impaired; the test result is the crime.
Section 23152(f) covers driving under the influence of any drug, including legal prescriptions that impair your ability to drive safely, and Section 23152(g) covers driving under the combined influence of alcohol and drugs.1California Legislative Information. California Vehicle Code 23152 You can only be punished for one offense per incident, but stacking gives the prosecution flexibility at trial.
Lower BAC Limits for Commercial and Young Drivers
The 0.08% number does not apply to everyone. If you hold a commercial driver’s license and are operating a commercial vehicle, Section 23152(d) drops the limit to 0.04%. The same 0.04% limit applies under Section 23152(e) to anyone driving with a passenger for hire, which covers rideshare and taxi drivers.1California Legislative Information. California Vehicle Code 23152
Drivers under 21 face a zero-tolerance rule under a separate statute, Vehicle Code 23136, which sets the threshold at 0.01%. At that level, a single drink can trigger a one-year license suspension through the DMV. That is an administrative penalty, separate from any 23152 criminal charge the driver may also face if the BAC reaches 0.08%.2California Legislative Information. California Vehicle Code 23136
First-Offense Penalties
A first DUI is a misdemeanor. The statutory sentence is 96 hours to six months in county jail, with at least 48 of those hours served continuously, plus a fine of $390 to $1,000.3California Legislative Information. California Vehicle Code 23536 Most first-time defendants get probation rather than the full statutory sentence.
When the court grants probation, it imposes conditions that include at least 48 hours in jail (often served on weekends), the same fine range, and enrollment in a state-licensed DUI education program. If your BAC was below 0.20%, the program runs at least three months and includes 30 hours of education and counseling. If your BAC was 0.20% or higher, or if you refused a chemical test, the court must order a nine-month, 60-hour program instead.4California Legislative Information. California Vehicle Code 23538 Your license will not be restored until the DMV receives proof that you completed the program.5Department of Health Care Services. Driving-Under-the-Influence Programs
The base fine is misleading. Once penalty assessments, court fees, and surcharges are added, the $390 minimum commonly reaches $2,000 or more. That figure does not include the DUI program, the SR-22 insurance filing, or the ignition interlock device.
Penalties for Repeat Offenses Within 10 Years
California uses a 10-year look-back window. Any prior conviction for DUI, DUI causing injury, or alcohol-related reckless driving inside that window counts as a prior and pushes a new conviction up the ladder.
Second Offense
A second DUI within 10 years is still a misdemeanor. The statutory sentence is 90 days to one year in county jail, plus a fine of $390 to $1,000.6California Legislative Information. California Vehicle Code 23540 On probation, the court must impose either a minimum of 10 days in jail or 96 hours served in two separate 48-hour blocks, depending on the probation terms, along with an 18-month or 30-month DUI education program.7California Legislative Information. California Vehicle Code 23542 The DMV suspends driving privileges for two years.
Third Offense
A third conviction within 10 years carries 120 days to one year in county jail and a fine of $390 to $1,000. The court designates the offender a habitual traffic offender for three years.8California Legislative Information. California Vehicle Code 23546 The DUI program at this stage is typically 18 or 30 months; the 30-month option can reduce the minimum jail time to 30 days.9California Legislative Information. California Vehicle Code 23548 The DMV revokes driving privileges for three years.
Fourth or Subsequent Offense
A fourth DUI within 10 years becomes a wobbler, meaning the prosecutor can file it as either a misdemeanor or a felony. The felony track carries a prison sentence under Penal Code 1170(h) or 180 days to one year in county jail, plus a fine of $390 to $1,000. The offender is designated a habitual traffic offender, and the DMV revokes driving privileges for four years.10California Legislative Information. California Vehicle Code 23550
When a DUI Becomes a Felony
A 23152 charge can leave the misdemeanor track in three main ways: a fourth offense as described above, a prior felony DUI, and an injury.
If you have a prior felony DUI conviction, any later DUI within 10 years is automatically charged as a felony regardless of severity. A simple DUI with no aggravating factors still becomes a felony under this rule.11California Legislative Information. California Vehicle Code 23550.5 If the prior felony was vehicular manslaughter while intoxicated, there is no 10-year cutoff at all; any later DUI is a felony.
Injuries push the charge into a different statute. When a DUI causes bodily injury to another person, the charge shifts from 23152 to Vehicle Code 23153. That statute is a wobbler at any offense number, so even a first-time DUI that hurts someone can be filed as a felony. The prosecution must prove you were driving under the influence (or above the legal BAC limit) and also committed some additional unlawful act or neglected a driving duty that caused the injury.12California Legislative Information. California Vehicle Code 23153
The DMV Suspension and the 10-Day Deadline
The DMV runs its own process, called the Administrative Per Se action, that is separate from the criminal case. It can suspend your license even if the criminal charges are later reduced or dismissed.
When you are arrested, the officer takes your physical license and issues a temporary one. From the day you receive the suspension notice, you have 10 days to request an administrative hearing with the DMV. Miss that deadline and the suspension takes effect automatically once the temporary license expires.13California Legislative Information. California Vehicle Code 13558 Requesting the hearing does not automatically pause the suspension either.
At the hearing, a DMV officer looks at three questions: whether the arresting officer had reasonable cause to believe you were driving under the influence, whether the arrest was lawful, and whether your BAC was 0.08% or higher (or 0.01% for under-21 drivers, 0.04% for commercial drivers). If the DMV rules against you, a first-time offender loses their license for four months. After a 30-day hard suspension during which no driving is allowed, you may qualify for a restricted license for work and DUI-program driving. Getting the restricted license requires enrolling in the DUI program, filing an SR-22 certificate of financial responsibility, and installing an ignition interlock device.14California Legislative Information. California Vehicle Code 13353.2
The administrative suspension and any court-imposed suspension run concurrently, so they are not stacked back to back. But the two tracks are independent. Winning the DMV hearing does not affect the criminal case, and a dismissal in court does not lift the DMV suspension on its own.
Refusing a Chemical Test
California is an implied consent state. By driving on California roads, you are treated as having already agreed to a chemical test of your blood or breath if you are lawfully arrested for DUI. The arresting officer must warn you that refusing will result in a license suspension and mandatory jail time if you are convicted.15California Legislative Information. California Vehicle Code 23612
Refusal triggers enhanced consequences on both sides. The DMV suspends your license for one year on a first refusal, with no restricted license available. That climbs to a two-year revocation with one prior DUI-related offense within 10 years, and three years with two or more priors.16California Legislative Information. California Vehicle Code 13353
On the criminal side, refusal adds mandatory jail time to whatever sentence you receive. A second DUI conviction with a refusal adds 96 hours of jail that cannot be suspended or stayed. A third DUI with refusal adds 10 days.17California Legislative Information. California Vehicle Code 23577 For a first offense, the court must order the nine-month DUI education program in place of the standard three-month program.4California Legislative Information. California Vehicle Code 23538
Ignition Interlock Device Requirements
California requires an ignition interlock device after a DUI conviction. The IID prevents the vehicle from starting unless the driver gives an alcohol-free breath sample. The mandatory installation period climbs with each offense:
- First offense: up to six months, as set by the court.
- Second offense: 12 months.
- Third offense: 24 months.
- Fourth or subsequent offense: 36 months.18California Legislative Information. California Vehicle Code 23575.3
A DUI causing injury under 23153 stretches those windows out further. A first-offense injury DUI requires a 12-month IID rather than the six months available for a standard first offense, and repeat offenders on the injury track can be required to keep the device installed for up to 48 months.18California Legislative Information. California Vehicle Code 23575.3 Monthly leasing and maintenance fees usually run $70 to $125.
What a Conviction Actually Costs
The court fine is the smallest line item. After penalty assessments and surcharges, the $390 minimum commonly passes $2,000. On top of that, plan for several costs the court does not itemize at sentencing:
- DUI education program fees, which vary by county and program length.
- SR-22 insurance. California requires an SR-22 certificate of financial responsibility for three years after a DUI, which typically raises annual premiums by roughly $800 to $3,500 above standard rates.
- Ignition interlock leasing at $70 to $125 per month, totaling several hundred to well over a thousand dollars.
- Towing and impound fees, which accrue daily until you pick up the vehicle.
- Private defense attorney fees, generally $1,500 to $10,000 for a first offense depending on complexity and whether the case goes to trial.
Added together, a first-offense DUI in California commonly reaches $10,000 to $15,000 in total out-of-pocket costs once the three-year insurance impact is included. Repeat offenses cost meaningfully more because programs run longer and the interlock stays installed longer.
Clearing a DUI Conviction Later
After you complete probation, you can petition under Penal Code 1203.4 to have the guilty verdict set aside and the case dismissed. This can help with private employment applications and some background checks.19California Legislative Information. California Penal Code 1203.4
The relief is limited. A dismissed DUI still counts as a prior if you are arrested again within the 10-year look-back window. You still have to disclose the conviction when applying for a state license, public office, or certain government positions. The court also has discretion over whether to grant a DUI petition, unlike most other misdemeanors where the relief is closer to automatic. You must have finished probation, paid all fines, and not be currently charged with or serving a sentence for another offense.19California Legislative Information. California Penal Code 1203.4