Driving under the influence (DUI) in California is charged under California law, which makes it unlawful to drive while impaired by alcohol or drugs or with a blood alcohol concentration of 0.08% or higher. An arrest starts two separate matters at the same time. One is the criminal case in court. The other is an administrative case with the DMV over your driving privilege, and that clock runs out in just 10 days. Speaking with a California DUI attorney early protects both. Below we cover California DUI laws. We explain the penalties for a first and second offense, when a charge becomes a felony, what happens to your license, which defenses carry weight, and whether a conviction can later be expunged.
What Counts as a DUI in California?
California DUI laws give prosecutors two separate ways to prove the same arrest. Under California DUI law, the state may charge the "per se" theory, the impairment theory, or both.
The per se theory looks only at the number. If your blood alcohol concentration measured 0.08% or higher, the state does not have to prove that you actually drove badly. The impairment theory looks at conduct instead. The state must show that alcohol or drugs left you unable to drive with the caution of a sober person. Prosecutors routinely file both counts from a single arrest. Defeating one theory does not automatically end the case.
The California DUI limit is not a single number. It depends on who is behind the wheel:
- 0.08% for most drivers age 21 and over
- 0.04% for drivers operating a commercial vehicle
- 0.01% for drivers under 21, under the state's zero-tolerance rule
- 0.01% for any driver already on DUI probation
A DUI in California is not limited to alcohol. Officers arrest drivers for impairment by prescription medication, by cannabis, and by a combination of substances. The state files those cases the same way. There is no per se number for drugs. No threshold exists. The prosecution leans on the officer's observations at roadside, the results of a blood test, and sometimes the opinion of a drug recognition evaluator. Those are softer forms of proof than a breath number, and they are open to challenge.
California DUI Penalties by Offense Level
California DUI penalties turn on three things: your record, your BAC, and the facts of the arrest.
Prior convictions matter most. The state uses a 10-year lookback window. Each qualifying prior inside that window raises the mandatory minimums. The BAC reading matters next. A result of 0.15% or higher often triggers a longer education program and stricter probation terms. Aggravating facts do the rest of the work. A collision, a chemical test refusal, a child passenger in the car, or excessive speed can each push a case toward the top of its range.
Treat the ranges below as statutory starting points, not predictions. Outcomes vary by county, by courthouse, and by judge. No attorney can tell you in advance what a particular court will do with your facts.
The fines are also only the beginning. Penalty assessments commonly multiply a base fine several times over. Add DUI school tuition, ignition interlock installation and monthly monitoring fees, license reinstatement costs, and years of higher insurance premiums. The real cost of a first DUI often reaches five figures.
First-Offense DUI Penalties in California
A first offense DUI in California is charged as a misdemeanor in the ordinary case. The fine range runs from roughly $390 to $1,000 before penalty assessments. Penalty assessments multiply the real figure several times over. Jail exposure exists on paper. Courts most often resolve a first DUI in California with three to five years of informal probation instead. Expect a DUI education program of three months, or nine months if your BAC was high. The DMV imposes a six-month suspension. A restricted license is available in most cases. An ignition interlock device is required before you drive again. Even a first time DUI California courts treat as routine leaves a permanent criminal record that shows on background checks. It counts as a prior for the next 10 years.
Second-Offense DUI Penalties in California
A second conviction within 10 years brings sharper mandatory minimums. A second offense DUI California drivers face carries a mandatory jail term. Probation is longer. An 18-month or 30-month DUI program is required. A two-year driver's license suspension applies. An ignition interlock device must be installed before driving resumes.
Here is the part most readers miss. The 10-year lookback runs from offense date to offense date, not from conviction date. A case you thought was long finished can still count as a prior. This happens even though the sentence ended years ago.
That is why the first move on a second offense DUI in California is often an attack on the prior itself. If the earlier plea was taken without a valid waiver of rights, the record of it may be incomplete. The prior may not be usable. When the prior falls away, so do the mandatory minimums attached to it.
Third and Subsequent DUI Offenses
A third conviction inside the 10-year window moves the case into a different tier. Courts can impose substantially longer mandatory jail exposure. The DMV can revoke the license for three years. A 30-month DUI program is standard. The state may designate the driver a habitual traffic offender.
The escalation that matters most comes next. A fourth DUI within the same 10-year window can be charged as a felony. This applies even with no collision and no injury at all. Whether it is filed that way depends on the county and the facts. The exposure is real and it changes the shape of the case.
Anyone facing a third or subsequent charge should seek defense counsel immediately. Do not plead at the first appearance. Once a plea is entered, the options that might have reduced the exposure are usually gone.
Is a DUI a Felony in California?
Most California DUI charges are misdemeanors. A DUI becomes a felony in three situations. The driving causes injury to another person. The driver has three prior DUI convictions in the preceding 10 years. The driver already has a felony DUI conviction. Clients often ask this question in these exact words: is DUI a felony in California, or is it something less serious?
The honest answer is that many of these cases sit on a line. An injury DUI is what California law calls a wobbler. A prosecutor may file it as a misdemeanor or as a felony. The decision turns on the severity of the injury, the BAC, how the person was driving, and the prior record. The charging decision happens before the first court date. That is exactly why defense counsel wants the arrest report, the medical records, and the test results early. Influencing how a case is filed is often worth more than fighting the charge months later.
The most serious cases go further. When a death results, the state may charge manslaughter. Where the record shows the driver had already been warned about the dangers of drunk driving, it may charge murder.
A felony conviction also carries consequences that outlast the sentence. It ends firearm rights. It triggers licensing review for nurses, contractors, commercial drivers, and other licensed professionals. For non-citizens, it can create serious immigration exposure.
Your License, the DMV Hearing, and the 10-Day Deadline
By driving in California, you already agreed to chemical testing. Under breath and blood testing requirements, a driver lawfully arrested for DUI must submit to a breath or blood test. Refusing carries its own penalty. A one-year suspension applies for a first refusal. That penalty applies on top of whatever the criminal case produces.
You have 10 days from the date of arrest to request a DMV hearing. The pink temporary license the officer handed you is also the suspension notice. If nobody requests the hearing inside that window, the suspension takes effect automatically 30 days after the arrest. The DMV will not reopen the deadline.
The hearing decides one thing only: your driving privilege. A DMV Driver Safety Office hearing officer runs it, not a judge. It uses a lower standard of proof than the criminal court. That gap produces a result our attorneys see repeatedly. Drivers resolve the criminal case in their favor and still lose the license. This happens because no one filed the hearing request in time. The two cases have to be fought separately.
At the hearing, an attorney can contest whether the stop was lawful. The attorney can challenge whether the officer had probable cause to arrest. The attorney can question whether the testing equipment was calibrated, maintained, and administered correctly. Subpoenaing the officer and the underlying records is part of that work.
If the suspension stands, a restricted license is often available. In most first-offense cases, the path back to driving runs through enrollment in a DUI program and installation of an ignition interlock device. This device lets you keep driving while the suspension period runs.
How a California DUI Attorney Defends Your Case
No two DUI cases break the same way. The pressure points are predictable. These are the angles our attorneys work in California cases:
- Unlawful stop or prolonged detention. An officer needs reasonable suspicion to stop you. The officer cannot hold you longer than the reason for the stop supports. If the stop fails, the evidence that followed it may be suppressed.
- Unreliable breath testing. Breath machines require calibration and maintenance on a set schedule. The operator must observe the driver for 15 minutes before the test. We pull the calibration and maintenance logs in every breath case. Devices do run outside their maintenance windows. That 15-minute period is often not truly observed. Mouth alcohol and residual mouth alcohol from burping, dental work, or reflux can inflate a reading on their own.
- Blood draw and chain-of-custody problems. Blood must be drawn by qualified personnel. Proper preservation requires the right additives. It must be tracked at every step. Fermentation in a poorly stored sample can raise the reported alcohol level after the fact.
- Rising blood alcohol. Alcohol keeps absorbing after the last drink. A driver can be under the limit at the wheel and over it an hour later at the station. That is not what the law prohibits.
- Medical conditions. Acid reflux, ketone production in diabetics, and hypoglycemia can mimic impairment. They can also skew a breath reading.
- Field sobriety test conditions. Footwear, a sloped or graveled road surface, wind, rain, and old injuries all make these tests weak indicators of impairment.
What separates a dedicated DUI practice from a general criminal practice is measurable. So ask. Ask about DUI case volume. Ask whether the DUI lawyer California drivers are considering knows the DMV hearing officers and prosecutors in their county. Ask whether the law firm actually litigates suppression motions. Ask whether it is prepared to try a case rather than plead it at arraignment. The best DUI lawyer in California for your situation is the one who meets those criteria in your county and on your facts. This is not the one with the largest advertising budget. No attorney can promise you a result. Be cautious of any who does.
Can You Expunge a DUI in California?
In most cases, yes. A California DUI conviction can generally be dismissed and set aside. This happens once you have completed probation. You must satisfy every condition of the sentence, including fines, classes, and restitution. You must not currently be charged with or serving a sentence for another offense.
It helps to be precise about what that relief does. The court withdraws the plea or verdict and dismisses the case. For most private employment purposes, you may then answer that you were not convicted. That is a meaningful change on a job application.
It matters just as much to know what DUI expungement California grants does not reach. The DMV still counts the conviction. Your driving record and your insurance rating do not reset. The DUI still counts as a prior inside the 10-year lookback if you are arrested again. It does not restore a commercial driving privilege. It does not hide the case from law enforcement or from state licensing agencies.
Timing is the question people ask most. Relief becomes available after probation ends. In some cases a court may terminate probation early. That starts the clock sooner. Eligibility depends on the specific conviction, the county, and your overall record. Have a California attorney review the case before assuming relief is available.
Talk to a California DUI Attorney Today
The 10-day DMV deadline is the reason not to wait. Every day after an arrest is a day off that clock. It is the one deadline in a California DUI case that cannot be reopened once it closes.
A consultation with DrunkDrivingDefense.com is free and substantive. A DUI attorney California drivers rely on will review the arrest report and the chemical test results. The attorney will identify what can be challenged. The attorney will request the DMV hearing on your behalf. The attorney will give you an honest read on the outcomes realistically in play given your record and the facts. You should leave that call knowing what happens next and when.
Our California DUI attorneys handle these cases statewide. We work in courthouses and DMV Driver Safety Offices across the state. Call 1-888-839-4384 or use our online contact form to schedule your free consultation.
Find a DUI lawyer near you in California:
- Anaheim DUI Lawyer
- Bakersfield DUI Lawyer
- Chula Vista DUI Lawyer
- Fremont DUI Lawyer
- Fresno DUI Lawyer
- Irvine DUI Lawyer
- Long Beach DUI Lawyer
- Los Angeles DUI Lawyer
- Modesto DUI Lawyer
- Moreno Valley DUI Lawyer
- Oakland DUI Lawyer
- Oxnard DUI Lawyer
- Riverside DUI Lawyer
- Sacramento DUI Lawyer
- San Bernardino DUI Lawyer
- San Diego DUI Lawyer
- San Francisco DUI Lawyer
- San Jose DUI Lawyer
- Santa Ana DUI Lawyer
- Stockton DUI Lawyer
California DUI Frequently Asked Questions
What is the legal BAC limit for a DUI in California?
For most drivers age 21 and over, the limit is 0.08%. Commercial drivers face a 0.04% limit. Drivers under 21 face a 0.01% zero-tolerance limit. Anyone on DUI probation is also held to 0.01%. You can still be charged below any of these numbers if an officer concludes that alcohol or drugs impaired your driving.
Is a first-time DUI in California a misdemeanor or a felony?
A first time DUI offense in California is almost always a misdemeanor. It becomes a felony only when the driving causes injury to another person. Even then, a prosecutor may still file it as a misdemeanor depending on the injury, the BAC, and the driving conduct. A first conviction carries fines, a DUI program, a license suspension, and a permanent record.
How long do I have to request a DMV hearing after a California DUI arrest?
Ten days from the date of arrest. If no request is made inside that window, the suspension takes effect automatically 30 days after the arrest. The DMV will not reopen the deadline. Requesting the hearing also puts the suspension on hold while the hearing is pending. This deadline runs separately from your court date, which is usually weeks away.
What are the penalties for a second offense DUI in California?
A second conviction within 10 years generally carries a mandatory jail term. Probation is three to five years. An 18-month or 30-month DUI program is required. A two-year license suspension applies. A required ignition interlock device is mandatory. The exact sentence depends on your BAC, the county, and any aggravating facts. Whether the prior conviction is legally valid can change the entire picture.
Can a DUI conviction be expunged in California?
Often, yes. Once probation is complete and every condition is satisfied, a California court may dismiss and set aside a DUI conviction. This lets you state that you were not convicted for most private employers. It does not clear your DMV record. It does not remove the DUI as a prior inside the 10-year lookback. It does not restore commercial driving privileges.
