What makes a DUI a felony.
A California DUI is charged under Vehicle Code section 23152, and in most cases it's a misdemeanour. It becomes a felony in three situations, and they work differently from each other.
A fourth offence within ten years. Under Vehicle Code section 23550, if you're convicted of a 23152 violation and the offence occurred within ten years of three or more separate prior convictions — under 23152, 23153, or reckless driving as specified in 23103.5, in any combination — the case is punishable as a felony.
A prior felony DUI. Under Vehicle Code section 23550.5, a 23152 or 23153 conviction is a felony if it happened within ten years of a prior DUI that was itself punished as a felony, or of certain vehicular manslaughter convictions.
An injury allegation. Vehicle Code section 23153 is a different offence entirely. It applies where a driver under the influence, or at 0.08 percent or more, also does something forbidden by law or neglects a legal duty, and that act or neglect proximately causes bodily injury to a person other than the driver. Note what that requires: not just impairment, but a separate act or omission, and a causal link to someone else's injury.
What the statute sets.
Under section 23550, a fourth-offence felony DUI is punishable by imprisonment under Penal Code section 1170(h), or in county jail for not less than 180 days nor more than one year, and a fine of not less than $390 nor more than $1,000. The DMV revokes the driving privilege, and the person is designated a habitual traffic offender for three years following the conviction.
Under section 23550.5, the offence is punishable by imprisonment in state prison or confinement in county jail for not more than one year, and the same $390 to $1,000 fine range.
Those are the statutory frames, not a prediction about your case. What actually happens depends on the facts, your record, and how the case is handled. Section 23153 exposure varies with the injury alleged and is not set out here for that reason.
What usually matters.
Whether the priors count. The ten-year window and what qualifies as a prior are both technical. Out-of-state convictions, old cases, and whether something was actually a 23103.5 reckless rather than a DUI all change the arithmetic. Priors get alleged that don't hold up.
Whether the stop was lawful. A felony DUI begins the same way a misdemeanour one does — with a stop that either had a lawful basis or didn't.
On an injury case, causation. Section 23153 needs a separate act or neglect that proximately caused the injury. That is a real element, and it isn't established just because someone was hurt and someone had been drinking.
The testing. Breath and blood results rest on equipment, calibration, timing and procedure, all of which are checkable.
How I handle these.
- Read the file first. Before I tell you what I think of it. What the report supports is usually narrower than what it alleges.
- Check the technical ground. The stop, the search, the testing, the paperwork — each of which is checkable rather than a matter of opinion.
- Work out what a good outcome looks like for you. That depends on your job, your record, your licence and what you actually need to protect. It isn't the same answer for everyone.
- Negotiate from what the file supports. Most cases resolve, and the leverage comes from knowing precisely what it will and won't carry.
- Trial where the offer isn't reasonable.
Where I handle these.
Across ten Northern California counties, from offices in Sacramento at 701 E Street and Roseville at 970 Reserve Drive, Suite 116. Licensed since 1999, State Bar number 203402.
Questions I hear most.
Is a fourth DUI automatically a felony?
Section 23550 applies where the offence occurred within ten years of three or more qualifying prior convictions. Whether your priors qualify is a technical question and not always the answer the paperwork assumes. For the wider picture, see DUI defense.
Can a felony DUI be reduced?
Some can. It depends on the section charged, the priors, and the facts. I'm not going to tell you it will happen in your case, because I'd be guessing — but it is one of the first things worth looking at. For the wider picture, see DUI defense.
Does an injury automatically mean section 23153?
No. That section requires an act forbidden by law or a neglected legal duty that proximately caused injury to someone other than the driver. Each of those is an element the prosecution has to prove. For the wider picture, see DUI defense.
What happens to my licence?
Separately and immediately. A DUI arrest starts a DMV proceeding with a 10-day deadline to request a hearing, independent of the criminal case. See the DMV hearing.
The statutes on this page
Statutory text checked against the California Legislative Information site on 6 August 2026. California criminal statutes commonly amend effective 1 January — if you are reading this well after that date, ask me rather than relying on it.
I treat my clients the way I would want an attorney to treat my mother, if she met with one. Call (916) 277-8299. The consultation is free.
