Uninsured and Underinsured Motorist Coverage in California

Reviewed by Shant Nashalian, Litigation Attorney at BANA LAW, PC. Last reviewed: July 2026.

If you are reading this from a hospital bed, or from a kitchen table covered in bills after a crash you did not cause, you may already have heard the sentence that changes everything: the other driver had no insurance, or nowhere near enough of it. Uninsured and underinsured motorist coverage in California is the one line on your own auto policy built for that moment, and the rules governing it live in Insurance Code section 11580.2. Our attorneys have represented injured Californians since 2003, and this is an area where what people assume about their policy and what it says drift furthest apart. Below: whether the state requires this coverage, the three conditions a claim must meet, the arithmetic that decides what your limits are worth, and the deadlines that close claims quietly.

Does California Require UM and UIM Coverage?

No. California does not require you to buy it. What the law requires is that your insurer offer it, and that requirement is not a formality. Under section 11580.2(a)(1), no bodily injury liability policy may be issued here without uninsured motorist coverage attached, unless you and the carrier agree in writing to delete it. That last clause carries enormous weight. A verbal “no thanks” to an agent does not remove the coverage, and without a signed written waiver in the file, California courts have construed the policy to include it anyway. Clients tell us with certainty that they rejected UM coverage years ago, and when we pull the underwriting file, the waiver is often missing, defective, or attached to a policy long since replaced. That one document can separate a claim worth nothing from a claim worth six figures, so if a carrier says you have no UM coverage, ask it to produce the signed waiver. Underinsured coverage rides along, so if you have UM, you have UIM.

Is Uninsured Motorist Coverage Worth It in California?

Look at who is on the road beside you. According to the Insurance Research Council’s 2025 nationwide study, an estimated 20.4 percent of California drivers were uninsured in 2023, the eighth-highest share in the country, against a national rate of 15.4 percent. One in five. On a commute down the 405 or Highway 99, that is not a remote hazard. It is the car in the next lane. California did raise the floor. Under Senate Bill 1107, Vehicle Code section 16056 now sets minimum bodily injury liability at $30,000 per person and $60,000 per accident, effective January 1, 2025, the first increase since 1967. The California Department of Motor Vehicles publishes the financial responsibility rules, and the California Department of Insurance explains what each coverage does. Doubling the old minimum sounds like progress until you price a serious injury: one ambulance ride, one emergency room workup, and one night of observation can clear $30,000 before a surgeon is consulted. The coverage adds a modest percentage to a premium, and it buys the only realistic recovery when the person who hurt you has nothing.

How Uninsured and Underinsured Motorist Coverage in California Works After a Crash

Uninsured and underinsured motorist coverage in California pays for injuries caused by a driver who has no insurance, cannot be identified, or carries limits smaller than yours. UM applies when there is no coverage on the other side. UIM applies when there is coverage, but not enough. Both are claims against your own carrier. That last point catches people off guard. The moment you open a UM or UIM claim, the company you have paid for years has the same interest every opposing carrier has: pay as little as possible. Expect the recorded statement request, the offer that lands before treatment ends, and the suggestion that your injuries predate the crash. There is also a structural trap in UIM that costs unrepresented claimants everything. Section 11580.2(p)(3) says UIM coverage does not apply until the bodily injury limits of every policy covering the at-fault vehicle are exhausted by payment of judgments or settlements, with proof submitted to your UIM carrier. Settle for one dollar less than the full limit and the claim is gone. Not reduced. Gone. The California Supreme Court called exhaustion a precondition to coverage in Quintano v. Mercury Casualty Co. (1995), and liability adjusters know what a ninety-cents-on-the-dollar offer does to your first-party claim.

The Math: What Your UIM Coverage Is Actually Worth

California UIM is difference-in-limits coverage, not a bonus stacked on top. The statute defines an underinsured vehicle as one insured for less than the UM limits you carry, and caps your carrier’s exposure at your limit minus what the liable parties paid.

Your UM/UIM limit (per person)	At-fault driver’s bodily injury limit	UIM available after credit
$30,000	$30,000	$0
$50,000	$30,000	$20,000
$100,000	$30,000	$70,000
$250,000	$100,000	$150,000

Read the first row twice. A minimum-limits driver now carries $30,000, so $30,000 in UM/UIM offers no underinsured protection at all against the most common driver on the road.

What Three Conditions Must Be Met to Receive Compensation Under Uninsured Motorist Coverage?

Three things must be true before a UM claim pays. First, you must be an insured with UM coverage in force. That reaches further than most drivers realize: the coverage follows the named insured, a spouse, and relatives in the same household, whether that person was driving, riding, or walking. A child struck in a crosswalk can be covered by a parent’s policy, which is why we review household policies in the pedestrian accident cases we take. Second, the other vehicle must be uninsured within the meaning of the statute: no liability coverage in force, or a driver who cannot be identified. If that question is disputed, a judge decides it, not the arbitrator. Third, the other driver must be legally liable for your bodily injury. UM does not pay because you were hurt; it pays what you would have been legally entitled to recover from the at-fault driver. Fault, causation, and damages still have to be proved, and pure comparative fault reduces recovery by your share of responsibility. Hit-and-run claims add their own conditions, and they are unforgiving. The unidentified vehicle must have made physical contact with you or your car, the crash must be reported to police within 24 hours, and a sworn statement must reach your insurer within 30 days. A phantom vehicle that ran you off the road without touching you generally will not qualify, even with witnesses. The California Highway Patrol or your local agency takes the report, and that sworn statement is a separate document a phone call cannot replace.

What to Do After a Crash With an Uninsured or Hit-and-Run Driver in California

1. Call police from the scene and confirm a report is generated the same day, inside the 24-hour window.
2. Get a medical evaluation immediately, even if adrenaline has you convinced you are fine.
3. Photograph the scene, your vehicle, and any paint transfer or debris, and collect witness contact information before anyone leaves.
4. Notify your carrier that a UM or UIM claim may exist, and request your declarations page and any waiver in writing.
5. Talk to a personal injury attorney before giving a recorded statement or settling with the at-fault driver’s insurer.

Should You Reject Underinsured Motorist Coverage?

We have never met a client who was glad they did. Rejecting it means betting that every driver who might hit you carries enough insurance for a serious injury, in a state where one in five carries none. And under Proposition 213, a driver who was uninsured when a crash happened cannot recover non-economic damages even if the crash was entirely someone else’s fault. Coverage is protection against other drivers and against a statute written to penalize you. We handled a case for a client in Contra Costa County who was out walking at night when a driver struck her and fled. She never learned who did it. The claim resolved for $1,250,000, which paid for the care her traumatic brain injury demanded and steadied a family that had lost its footing. Past results do not guarantee future outcomes, and every case turns on its own facts, but the profile is worth sitting with: an unidentified driver, a badly hurt person, and coverage that existed because someone chose not to decline it. Consultations at BANA LAW are free and confidential, we answer 24/7, and we advance all case costs on a no win, no fee basis. One more deadline ends more claims than any argument about damages. Section 11580.2(i)(1) provides that no cause of action accrues unless, within two years of the crash, you file suit against the uninsured motorist, conclude an agreement on the amount due, or formally institute arbitration by certified mail. Settlement talk with an adjuster does none of those. It runs alongside the two-year personal injury deadline the California Courts self-help center describes, but it is separate, and missing it forfeits the coverage.

Uninsured and Underinsured Motorist Coverage in California: What to Do Now

Given who is on the road and what a serious injury costs, this is the primary protection most California drivers have, and the one most likely to be set at a number that cannot help them. It deserves an hour today rather than a discovery on the worst day of your life.

• Pull your declarations page and read your UM/UIM limits. If they sit at $30,000 per person, call your agent this week and raise them along with your liability limits.
• If an uninsured, underinsured, or hit-and-run driver hit you, calendar the 24-hour report, the 30-day sworn statement, and the two-year accrual deadline now.
• Never settle with the at-fault insurer for less than full policy limits until someone confirms what that does to your UIM claim.

How BANA LAW Can Help

We handle these claims the way we handle litigation, because functionally that is what they are. We audit every household policy for coverage, request the waiver file when a carrier claims none exists, structure the liability claim so exhaustion is preserved, and protect the accrual deadline before it is used against you. Our guide to what to do if you’re hit by an uninsured or underinsured motorist covers the first steps, our Los Angeles car accident lawyers page explains how we build these cases, and if your damages exceed every available limit, read whether you can sue for more than auto insurance policy limits before accepting anything.

Frequently Asked Questions About Uninsured and Underinsured Motorist Coverage in California

Is uninsured motorist coverage required in California?

California does not require drivers to buy it, but insurers must offer it with every bodily injury liability policy. You can decline only through a signed written waiver, and without that waiver the coverage is generally read into your policy anyway.

What is the difference between UM and UIM coverage?

UM applies when the at-fault driver has no liability insurance or cannot be identified after fleeing. UIM applies when that driver has insurance but carries limits lower than the UM limits on your own policy.

Will my rates go up if I use my UM or UIM coverage?

California law does not permit a carrier to raise your premium or refuse renewal because you used coverage in a crash you did not cause. Adverse rate consequences require that the insured was at fault.

How much UM and UIM coverage should I carry?

Carriers must offer these limits only up to $30,000 per person and $60,000 per accident, and a minimum-limits driver now carries that same $30,000, so matching the state floor leaves no underinsured protection. Drivers with assets or dependents should discuss higher limits with their agent.

Do I have to collect the at-fault driver’s full policy limit before using UIM?

Yes, and this rule destroys more otherwise strong claims than any other. The at-fault bodily injury limits must be exhausted by payment of judgments or settlements with proof submitted to your carrier, so settling for slightly less forfeits the UIM claim.

What if the driver who hit me fled the scene?

Your UM coverage can still apply, because California treats an unidentified driver as uninsured. You will need physical contact with the fleeing vehicle, a police report within 24 hours, and a sworn statement to your insurer within 30 days.

Does UM coverage protect me if I was walking or riding a bicycle?

Yes, because the coverage follows you as a person rather than only your car. A named insured, a spouse, and relatives in the same household are covered as pedestrians and cyclists struck by an uninsured driver.

How long do I have to bring a California UM claim?

Within two years of the crash you must file suit against the uninsured motorist, conclude an agreement on the amount due, or formally institute arbitration in writing by certified mail. Negotiating with an adjuster satisfies none of those, and the deadline is enforced strictly.

Can I stack my UM limits across multiple vehicles or policies?

California does not permit stacking of uninsured or underinsured motorist limits. If you carry $100,000 in UM coverage, that figure is the ceiling regardless of how many vehicles or policies you hold.

Why is my own insurance company fighting my claim?

Once you file, your carrier’s financial position is identical to any opposing insurer’s, and its adjusters use the same tactics. That is why representation matters as much here as in a lawsuit against a stranger.

Will my UM or UIM claim go to court or to arbitration?

Most California disputes over liability and damages in these claims are resolved through binding arbitration rather than a jury trial. Coverage questions, such as whether the other vehicle qualifies as uninsured, go to a judge instead.

What if I have no UM coverage and the at-fault driver is uninsured?

Your options narrow but are not always zero, and an attorney can investigate employer liability, other responsible parties, and any medical payments coverage on your policy. None of those replace UM protection, which is why verifying coverage before you need it matters.

Talk to BANA LAW Today

If an uninsured, underinsured, or hit-and-run driver has upended your life, call BANA LAW, PC at (866) 418-1437. Consultations are free, confidential, and available 24 hours a day, seven days a week. We work on a no win, no fee basis and advance all case costs, so representation costs you nothing out of pocket. Se habla español. Our attorneys will review your policy and identify every source of recovery available to you.

Legal Disclaimer

This article provides general information about California law and is not legal advice. Reading it, or contacting BANA LAW, PC through this page, does not create an attorney-client relationship. Policies, deadlines, and legal standards vary with the facts of each case, and any result described here does not guarantee or predict a similar outcome in another matter. Please consult a licensed California attorney about your situation before making any decision about a claim.