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Chemical test refusal in California: Consequences and defense options

By Vincent Tucci | Managing Partner & DUI Defense Expert

California’s implied consent law, in plain English

By driving in California, you agree to submit to a chemical test after a lawful DUI arrest. This is the state’s implied consent rule (VC §23612). Officers must advise you that refusal leads to immediate license consequences and can increase criminal penalties. Pre–arrest roadside breath tests (PAS) are generally voluntary for adults, but post–arrest chemical testing is not.

DMV consequences if you refuse

A refusal triggers an Administrative Per Se action by the DMV that runs independently from the court case. For a first refusal, the DMV typically imposes a one–year suspension. You’ll receive a 30–day temporary license; you generally have 10 days to request a hearing to contest the action. DMV overview pages explain these processes and timelines: https://www.dmv.ca.gov/portal/driver-education-and-safety/dmv-safety-guidelines-actions/driving-under-the-influence/ and https://www.dmv.ca.gov/…/ffdl-26/.

Court–side enhancements for refusal

Separate from the DMV, prosecutors may seek added sentencing based on a refusal under VC §23577. Courts can impose additional custody time, longer DUI education, and tighter probation conditions. The exact impact depends on case facts, county policy, and prior history.

Defense options that can change the outcome

  • No lawful arrest / lack of probable cause: If the stop or arrest was unlawful, refusal evidence can be excluded.
  • Improper advisement: Officers must give clear, complete warnings. Inadequate advisements can defeat a refusal allegation.
  • Medical inability / special circumstances: Asthma, COPD, recent oral surgery, bleeding disorders, or needle phobia can support a blood or breath test inability defense.
  • Language / confusion issues: Demonstrated confusion about rights or instructions can undermine the state’s refusal theory.

Start building your record immediately: write down what was said, identify witnesses, and preserve video where possible. Our detailed guides cover test mechanics and Title 17 procedures: https://www.caduilaw.com/dui-law-library/chemical-test-refusal-or-failure/, https://www.caduilaw.com/dui-defenses/, and https://www.caduilaw.com/field-sobriety-tests/.

DMV hearing playbook: preserve your ability to drive

We file the hearing request, seek a stay where available, subpoena the officer and records, and cross–examine on advisements, timelines, and procedure. Even when refusals are alleged, set–asides happen—especially where advisements were deficient or the arrest lacked probable cause. Learn what to expect: https://www.caduilaw.com/court-dmv-trials/dmv-hearings/.

Pro tips after a refusal

  • Move fast: Calendar the 10–day DMV deadline the day you are released.
  • Stay silent: Do not post about your case online; limit case facts to privileged conversations with counsel.
  • Collect proof: Save medical paperwork, work schedules, and any videos that corroborate your condition and officer interactions.

FAQs

Does refusing the roadside PAS test count as a refusal?

For adults 21+, pre–arrest PAS is generally voluntary. The refusal consequences discussed here are tied to post–arrest chemical testing.

Can I change my mind after saying “no”?

Not reliably. Once the officer records a refusal, courts may treat later cooperation as too late; we focus on advisement accuracy and timing to fight the allegation.

How long is a first–offense refusal suspension?

Typically one year through the DMV’s Administrative Per Se process, separate from court sentencing.

Can I get a restricted license on a refusal?

Options are narrower in refusal cases. We evaluate ignition interlock and eligibility under current rules and county practice.

The bottom line

Refusal allegations raise the stakes in both DMV and court. With rapid action and precise procedural challenges, you can protect your license and narrow sentencing exposure. Braden & Tucci—Southern California’s Most Respected DUI Attorneys—will pressure–test every step and fight for the best possible outcome.

Author Bio: Vincent Tucci is the Managing Partner at https://www.caduilaw.com/ with over 25 years of DUI defense experience, certified in SFST and breath testing, and has handled thousands of cases and DMV hearings.

Disclaimer: This article is informational and not legal advice. Results are not guaranteed. By submitting contact forms, users agree to be contacted about their request and other information using automated technology. Message frequency varies. Msg & data rates may apply. Text STOP to cancel.

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Hi Vince,

I just wanted to take a minute to thank you again for the great job you did keeping Rick out of prison. You are awesome!!! I’ll be sending the rest of your fee ASAP. Thanks again :-}

L.T., San Bernardino, California

Hi Vince,

I just found out that I have gotten my medical license back without any restrictions or probation!!!!! I cannot express how thankful I am that you went the extra mile to help me when I know that you did not have to. You are an amazing lawyer, but more than that you are a great person. Really I am forever greateful.

P.S, Los Angeles County, California

*This case was a first offense DUI with a .19 blood alcohol level that I got reduced to a dry reckless and won the DMV hearing. I also assisted the client with the medical board of California and the Attorney General’s office……Vincent John Tucci, President of the CA DUI Lawyer’s Association

Hey Vincent,

Just wanted to thank you in writing for your flawless work in court today for my DUI case. I’ve heard it before but today I got to witness first hand that district attorneys and prosecutors don’t necessarily care about the truth or sometimes even evidence. What they care about the most is winning, regardless of the evidence or shady testimony of their key witnesses. I can honestly say that if I did not have you as my attorney and advocate, the prosecutor would have minced me up and grounded me to little bits of pieces. Your knowledge of the law and to effectively use that knowledge for the benefit of your client is in my opinion an art form and you have mastered it. I’m so happy that I trusted my instincts to retain your services. You did not let me down.

Thanks again Vincent!
Best regards,

Peter A.