What Happens if You Refuse a Breathalyzer Test in California?

Refusing a breathalyzer in California feels like exercising a right — and at the roadside PAS screening stage, it often is. But once you’re under arrest and an officer reads you the Implied Consent admonition, refusing carries its own automatic penalty stack that hits your driving privileges harder than most first-offense DUIs would have on their own. This guide explains exactly what a refusal triggers under California law, how Alameda County agencies handle refusal cases, and the narrow set of situations where refusal actually improves your position.

Morris Law is an East Bay criminal defense firm serving Oakland, Berkeley, and Alameda County. Seth Morris spent nearly a decade as an Alameda County Deputy Public Defender and has defended dozens of refusal cases in the exact courtrooms and DMV hearing offices covered below.

Two Different Breathalyzers, Two Different Rules

The single most common misunderstanding about “refusing the breathalyzer” is that there is only one test. In fact, California has two entirely separate chemical tests, at different legal stages, with different rules about refusal.

The Roadside PAS (Preliminary Alcohol Screening) Test

The PAS is the handheld device an officer uses before arresting you. Under Vehicle Code §23612(h) and §23612(i), the PAS is one of the field sobriety tests, and it is voluntary for most drivers. If you are 21 or older and are not on DUI probation, you can decline the PAS and the officer cannot use your refusal against you at trial. The only consequences of declining the PAS are (a) the officer will decide whether to arrest based on other observations, and (b) you will still be subject to the post-arrest chemical test later.

PAS is not voluntary if you are under 21 (VC §23136 Zero Tolerance), or if you are currently on DUI probation (VC §23154). In those cases, PAS refusal has the same automatic license consequences as post-arrest refusal.

The Post-Arrest Chemical Test

Once you have been lawfully arrested for DUI, Vehicle Code §23612 (California’s Implied Consent Law) says that by driving on California roads you have already consented to a chemical test — either breath or blood — to determine your BAC. Refusing this post-arrest test triggers a mandatory license suspension by the DMV completely independent of the criminal case.

What Happens Automatically When You Refuse Post-Arrest

Automatic DMV License Suspension

Under Vehicle Code §13353, a refusal of the post-arrest chemical test triggers a mandatory suspension by the DMV, on top of any suspension resulting from a DUI conviction:

• First refusal: 1-year license suspension. No restricted license eligibility during the first year — you cannot drive for work, medical appointments, or anything else.
• Second refusal within 10 years: 2-year license revocation.
• Third or subsequent refusal within 10 years: 3-year revocation.

Compare this to what a first-offense DUI conviction alone typically produces: a 6-month suspension with restricted-license eligibility after 30 days. A refusal turns a 4-week driving restriction into a full year off the road.

Refusal Is a Criminal Enhancement

Beyond the DMV consequences, a refusal is charged as an enhancement to the underlying DUI in the criminal case. For a first-offense DUI with a refusal:

• Mandatory 48 hours in county jail (Alameda County typically stayed on probation with community service)
• Mandatory 9-month DUI school instead of 3-month program
• Ignition interlock device (IID) required for 1 year

Officers Get a Warrant Anyway

Post-2013 Missouri v. McNeely (569 U.S. 141) case law requires officers to get a warrant for a nonconsensual blood draw. In practice, in Alameda County, that warrant takes 30–60 minutes to obtain — on-call judges are available 24/7 and warrants are filed electronically. Refusing the breath test typically just means blood evidence instead of breath evidence, plus every consequence of refusal on top.

How Alameda County Agencies Handle Refusals

Oakland Police Department

OPD DUI stops typically move from PAS to arrest to admonishment at the OPD station on 7th Street or at the OPD North County Jail. If you refuse, an OPD DUI officer will contact an on-call Alameda County Superior Court judge for a warrant. A phlebotomist is usually available on-site or nearby. Blood is drawn within 60–90 minutes of arrest.

Berkeley Police Department

BPD follows the same warrant-for-blood protocol. Arrests are processed at 2100 Martin Luther King Jr. Way. Berkeley refusal cases can be arraigned at the Berkeley Courthouse or transferred to Oakland’s Wiley Manuel.

California Highway Patrol (CHP Oakland)

CHP handles most freeway DUIs in Alameda County (I-580, I-880, I-980, I-24, Bay Bridge western approach). Their protocol on refusal is well-practiced — CHP officers routinely obtain warrants within 30–45 minutes. CHP refusals are almost always accompanied by a blood draw at Highland Hospital or a designated forensic phlebotomy site.

Alameda County Sheriff’s Office

Sheriff’s deputies patrol unincorporated Alameda County (Castro Valley, San Lorenzo, Ashland) and back up smaller cities. Refusal cases are typically booked at Santa Rita Jail in Dublin, where forensic blood draw is available on-site.

The Two Parallel Cases: DMV APS Hearing and Criminal Court

A refusal case creates two entirely separate legal proceedings, both of which must be defended:

The DMV Administrative Per Se (APS) Hearing

Under Vehicle Code §13557, you have 10 days from the arrest date to request an APS hearing. Miss the deadline and the suspension takes effect automatically. The hearing addresses only three questions:

1. Did the officer have reasonable cause to believe you were DUI?
2. Were you lawfully arrested?
3. Did you refuse the chemical test after being properly admonished?

Alameda County APS hearings are held at the DMV Driver Safety Office in Oakland. The hearing officer is a DMV employee, not a judge. The burden of proof is a preponderance — much lower than the criminal reasonable-doubt standard. Winning the APS hearing avoids the automatic license suspension entirely.

The Criminal DUI + Refusal Case

The criminal case addresses whether you were driving under the influence AND whether the refusal was actual and knowing. Both are separate elements the prosecution must prove beyond a reasonable doubt. This case moves through the Wiley W. Manuel Courthouse for misdemeanor filings, or René C. Davidson for felony filings.

The two cases are legally independent. Winning the DMV APS does not affect the criminal case. Winning the criminal case does not undo the DMV APS suspension. Both must be handled.

When Refusal Actually Helps a Defense

The conventional wisdom that “refusing is always bad” is not quite accurate. There are narrow circumstances where refusal has some tactical value:

1. Extremely High BAC Cases

If your actual BAC is 0.20+ (roughly triple the legal limit), a breath or blood result creates strong evidence of a “aggravated” DUI enhancement under VC §23578. A refusal, followed by an eventual warrant-obtained blood draw, at least ensures the evidence is limited to one snapshot rather than a rising-BAC curve from a repeated test.

2. Cases Where Arrest Was Illegal

If the initial DUI stop was not supported by reasonable suspicion, or the arrest itself lacked probable cause, the Implied Consent Law does not apply. Refusal in an illegal arrest is not chargeable, and the resulting DMV suspension can be reversed at the APS hearing. This is a real, but narrow, defense — Morris Law has run this argument successfully in Alameda County APS hearings when the underlying stop was pretextual or unsupported.

3. Cases Where the Admonishment Was Defective

Under VC §23612(a)(1)(D), the officer must clearly inform you of the consequences of refusal — the license suspension, the criminal enhancement, and that refusal will be used against you in court. If the officer skipped or garbled the admonishment (particularly common in cases involving non-English speakers where translation was inadequate), the refusal may not sustain a suspension.

What to Do In the First 72 Hours After a Refusal Arrest

1. Request an APS hearing within 10 days. This is a hard deadline. Miss it and the license suspension takes effect automatically. Call the Alameda County DMV Driver Safety Office at (510) 563-8998 or have your attorney file the request in writing.
2. Get counsel involved immediately. The APS hearing and the criminal case both benefit from early investigation — dashcam and body-cam footage preservation, witness statements, and challenge to the underlying stop.
3. Do not talk to the officer’s follow-up questions. Post-arrest, officers often ask “just to clarify” — anything you say is evidence. The right to remain silent applies.
4. Don’t drive on a suspended license. Driving on a suspended license under VC §14601 is its own criminal charge and typically escalates penalties on both the underlying case and any future DUI.

Frequently Asked Questions

Can I refuse a roadside PAS breath test in California?

Yes, if you are 21 or older and not currently on DUI probation. Under Vehicle Code §23612(h), the roadside PAS is a field sobriety test that you can decline. The officer cannot use your refusal to decline the PAS against you at trial. If you are under 21 or on DUI probation, the PAS is mandatory.

Is the post-arrest chemical test also voluntary?

No. Once you’re under arrest for DUI, Vehicle Code §23612 (Implied Consent) requires you to submit to either a breath test or a blood test. Refusing triggers automatic license suspension by the DMV and a criminal enhancement in the DUI case — regardless of whether you’re eventually convicted of the DUI itself.

What if the officer never told me refusing would cost my license?

The officer is required under VC §23612(a)(1)(D) to clearly admonish you about the consequences of refusal. If the admonishment was missing, incomplete, or given in a language you couldn’t understand, the DMV APS suspension can potentially be reversed at hearing. This is a real defense — bodycam footage of the admonishment is critical evidence.

How long do I have to fight a refusal license suspension?

You have 10 days from the arrest date to request an Administrative Per Se (APS) hearing with the DMV. Miss the deadline and the 1-year suspension takes effect automatically. The hearing typically occurs within 60–90 days of the request at the DMV Driver Safety Office in Oakland.

If I refuse, will the police get a blood test anyway?

Almost certainly yes. After the 2013 Missouri v. McNeely Supreme Court decision, officers routinely obtain warrants for nonconsensual blood draws — in Alameda County, that warrant takes 30–60 minutes to secure via the on-call judge system. Refusal typically just delays the evidence and stacks the refusal penalties on top.

What courthouse handles refusal DUI cases in Alameda County?

Misdemeanor DUI-with-refusal cases are arraigned at the Wiley W. Manuel Courthouse (661 Washington Street, Oakland). Felony DUI cases (including refusal cases with injury or a fourth-plus DUI) go to the René C. Davidson Courthouse (1225 Fallon Street, Oakland).

Does a refusal make my DUI case unwinnable?

No. Refusal creates an additional element the prosecution must prove and adds a “consciousness of guilt” argument, but many refusal DUI cases are won or reduced. Common defenses include challenging the initial stop, contesting the arrest’s legality, disputing the admonishment adequacy, and arguing that the officer misidentified conduct as refusal when the driver was attempting to comply.

Can I get a restricted license during my refusal suspension?

Generally, no — refusal suspensions do not qualify for a restricted license during the first year (unlike a standard first-DUI suspension, which allows restricted driving after 30 days). This is the single biggest practical difference between a DUI conviction alone and a DUI with refusal.

Talk to an East Bay DUI Refusal Defense Attorney

Refusal cases move fast — the 10-day APS deadline is often the first casualty, and the criminal case moves in parallel through Wiley Manuel or René C. Davidson. Handling both proceedings from day one is the difference between a full year off the road and a much narrower outcome.

Morris Law’s East Bay offices — Oakland (2744 E 11th Street · (510) 824-8831) and Berkeley (2025 Rose Street, Suite 200 · (510) 225-9955) — handle Alameda County DUI refusal cases, from APS hearings at the Oakland DMV Driver Safety Office through jury trial. Call (510) 330-0814 for a free 24/7 consultation.

Related East Bay DUI Resources

• East Bay DUI Defense (firm-wide)
• Oakland DUI Defense
• Berkeley DUI Defense
• How Long Does a DUI Stay on Your Record?
• When Is a DUI a Felony in California?
• What Happens with a Hit-and-Run Charge?