California DUI law does not change dramatically every year, but it does shift, and the details that are in effect right now are what matter to your case. This is a plain review of where California DUI law stands in 2026, the rules that are settled, and the areas where enforcement and the legislature continue to move. It is general information, current as of the review date above, and not legal advice for your specific situation.
The limits in effect in 2026
The core blood alcohol limits are unchanged and well settled. The standard limit is 0.08 percent for drivers 21 and over. Commercial drivers are held to 0.04 percent while operating a commercial vehicle. Drivers under 21 fall under the zero-tolerance rule, which makes any reading of 0.01 percent or more a basis for a license suspension under Vehicle Code 23136. Importantly, you can still be charged for driving under the influence below these numbers if an officer concludes your driving was actually impaired, because impairment, not only the number, is what the statute reaches. The two charges you will usually see are VC 23152(a) for being under the influence and VC 23152(b) for the 0.08 percent number.
Statewide ignition interlock is now routine
California's statewide ignition interlock requirement under Vehicle Code 23575.3, in effect since 2019, is now the normal course for DUI convictions. A first offense generally carries a 6-month requirement, and the period grows with the offense level. The interlock path is also how many drivers obtain a restricted license sooner rather than waiting out a full suspension. If you want to see how it applies to your facts, use the IID requirement checker, and read the full ignition interlock device overview.
Implied consent and refusals
The implied consent framework remains firmly in place. By driving in California you are deemed to have consented to a chemical test after a lawful DUI arrest, and refusing carries a longer license suspension and a possible sentencing enhancement. Courts continue to scrutinize whether the arrest was lawful and whether the driver was properly advised of the consequences, which is where many refusal allegations are challenged. The detail is in the chemical test refusal article.
Drugs, cannabis, and impairment
Enforcement attention to drug-impaired driving, including cannabis and prescription medication, continues to grow. Because California has no per se limit for marijuana, these cases turn on proof of actual impairment rather than a number, and the Drug Recognition Expert evaluation is central and contestable. The framework is covered in detail in the guide on marijuana DUI in California.
The penalty structure has not changed
The ladder of consequences remains what it has been. A first offense is a misdemeanor usually resolved on probation, with a fine plus heavy assessments, a 3-month or 9-month alcohol program depending on the BAC, and a license suspension you can usually drive through with an interlock. A second within 10 years and a third escalate the mandatory minimums sharply, and a fourth, or any DUI causing injury, can be charged as a felony. The full breakdown is in the California DUI penalties guide, and the way priors drive the result is in how prior convictions affect a charge. The 10-year lookback that controls all of this is measured between offense dates, a detail worth fighting over.
Diversion options are expanding
One genuinely moving area is diversion. Standard misdemeanor diversion under Penal Code 1001.95 still excludes DUI, but other paths can apply depending on the facts: mental health diversion under Penal Code 1001.36 and military diversion under Penal Code 1001.80 both reach some DUI defendants, and recent appellate decisions and a 2025 expansion have kept the contours shifting. If you are a veteran or have a qualifying mental health condition, these are worth examining closely, because a successful diversion can lead to a dismissal rather than a conviction.
Relief after a case is settled
The tools for cleaning up a record remain available and, in some respects, have gotten stronger. Once probation is complete, many convictions can be expunged under Penal Code 1203.4, and California's automatic record-sealing law now seals most eligible expunged misdemeanors. A felony wobbler can often be reduced to a misdemeanor under Penal Code 17(b) first. If your case ended without a conviction, the arrest itself can be sealed under Penal Code 851.91. None of this happens automatically in the courtroom; it has to be pursued.
Enforcement trends to watch
Beyond the statutes, enforcement practice shifts. Holiday and weekend saturation patrols and DUI checkpoints continue, and checkpoints still have to meet strict constitutional requirements to be valid. Agencies increasingly rely on blood draws and electronic warrants for refusals, which opens its own set of chain-of-custody and procedural challenges. Body-camera and dash-camera footage is now central evidence in most cases, and the gap between what the report claims and what the video shows is often where a defense is built.
What tends to change year to year
The areas that move most often are penalty amounts, program requirements, fee schedules, and the details of restricted-license and interlock administration. The legislature also periodically revisits enhancements and diversion options. None of this changes the basic structure of a DUI case: a criminal charge on one track and a DMV action on the other, with a 10-day deadline that does not wait. When a meaningful change takes effect, this page is updated to reflect it.
What to do right now
Whatever the year, the early steps are the same. Protect the 10-day DMV deadline, preserve your paperwork, and get the stop and the chemical testing reviewed. You can read the first 10 days after a DUI, walk through the DUI court process step by step, or get a free written case analysis below. You can also call me directly at (888) 271-6644 to talk through how the current rules apply to your case. I answer my own phone, 24/7. You can also see more from the DUI blog.