Uninsured motorist coverage in California is not legally required, but every auto insurer in the state must include it in your policy unless you reject it in writing. If you never signed a rejection form, you already have it, at limits matching your bodily injury liability limits. With roughly one in six California drivers carrying no insurance, this coverage is the only reliable way to get paid for your injuries when the person who hits you has nothing.
Is It Required, or Just Offered?
California Insurance Code Section 11580.2 takes a middle path. It doesn’t force you to carry uninsured motorist (UM) coverage, but it forces your insurer to build it into every policy at limits equal to your own bodily injury liability limits unless you affirmatively opt out.1California Legislative Information. California Insurance Code 11580.2 – Uninsured Motorist Coverage The practical result is that most drivers already carry UM coverage whether they realized they were buying it or not.
The design puts the burden on insurers to present the option and on you to walk away from it in writing. Drivers who never read their declarations page still end up protected. Drivers who want to decline can, but they have to do it deliberately.
What Uninsured Motorist Bodily Injury Pays For
UMBI is the part of the coverage that matters most. It pays your medical bills, lost income, and pain and suffering when an uninsured driver injures you. Your UMBI limits mirror your bodily injury liability limits unless you specifically chose lower amounts.2California Legislative Information. California Insurance Code 11580.2 – Uninsured Motorist Coverage If your policy carries the state minimum liability limits of 30/60, your UMBI defaults to 30/60 as well.
Those numbers can disappear fast in a real accident. A single ER visit, a surgery, and a few weeks off work will run through $30,000 easily. Higher UMBI limits are usually one of the cheapest meaningful upgrades on a California auto policy, because the coverage only activates in the specific situation where the other driver can’t pay.
Property Damage Coverage Is Capped
Uninsured motorist property damage (UMPD) covers damage to your car, but the maximum payout is $3,500 or your vehicle’s actual cash value, whichever is less. If you also carry collision coverage, UMPD flips roles and pays only your collision deductible, still capped at $3,500.3California Legislative Information. California Insurance Code 11580.26 – Collision Deductible Waiver
Two restrictions further limit what UMPD does. The at-fault uninsured driver has to be identified, so a hit-and-run with no plate number won’t trigger it. And California doesn’t let you carry both collision and UMPD at the same time, because collision already covers vehicle damage regardless of fault.
Underinsured Motorist Coverage Comes With It
California treats underinsured motorist (UIM) coverage as a package deal with UM coverage. Insurers must offer both together, and a vehicle counts as “underinsured” when its liability limits are lower than your own UM limits.1California Legislative Information. California Insurance Code 11580.2 – Uninsured Motorist Coverage
UIM doesn’t pay until the at-fault driver’s insurer has paid its full policy limits first, and your insurer’s maximum liability is your UIM limit minus what you already received. If you carry $100,000 in UIM coverage and the other driver’s insurer pays out its $30,000 limit, your own insurer owes up to $70,000 more, not the full $100,000 on top.
The Hit-and-Run Physical Contact Rule
UM coverage extends to hit-and-run accidents, but with a restriction that catches many drivers off guard. To file a UMBI claim for a hit-and-run in California, there must have been actual physical contact between the other vehicle and either you or a vehicle you were occupying.1California Legislative Information. California Insurance Code 11580.2 – Uninsured Motorist Coverage
A driver who swerves into your lane, forces you off the road, and disappears without ever touching your car is sometimes called a “phantom driver.” Even with witnesses, your UM coverage likely won’t apply, because no contact occurred. If you’re involved in a hit-and-run, file a police report immediately and photograph any paint transfer, scrapes, or dents that prove contact happened. That evidence often decides the claim.
You Cannot Stack Limits Across Vehicles
Some states let drivers “stack” UM limits across multiple vehicles on a single policy, effectively multiplying available coverage. California doesn’t. Section 11580.2 is explicit that regardless of how many vehicles are insured, how many people are covered, or how many premiums you pay, limits from multiple vehicles or policies cannot be added together.1California Legislative Information. California Insurance Code 11580.2 – Uninsured Motorist Coverage
Insure three cars with $100,000 UMBI limits each, and your maximum recovery on any one claim is still $100,000. The only way to increase your UM protection is to buy a higher per-vehicle limit.
How to Decline the Coverage
If you decide UM coverage isn’t worth the premium, you have to sign a written rejection on a form your insurer provides. The form must clearly state you’re removing the coverage. Without that signed document, the insurer is legally obligated to include UM coverage and charge you for it.2California Legislative Information. California Insurance Code 11580.2 – Uninsured Motorist Coverage
Once signed, the rejection carries forward through every renewal, transfer, or replacement of the policy with the same insurer, and it survives any lapse and reinstatement within 30 days. You don’t have to re-sign every renewal period. To restore the coverage later, send your insurer a written request, and coverage picks up from that point forward.
Declining saves a modest amount on your premium. The tradeoff is that if an uninsured driver seriously injures you, your only remedy is suing that person personally, and someone driving without insurance rarely has assets worth pursuing.
The Collision Deductible Waiver Option
If you carry both collision coverage and UMBI, your insurer must offer you a collision deductible waiver under Insurance Code Section 11580.26.3California Legislative Information. California Insurance Code 11580.26 – Collision Deductible Waiver The waiver eliminates your collision deductible when the vehicle damage was caused by an uninsured driver. Without it, you file a collision claim and pay your deductible out of pocket even though the accident wasn’t your fault.
For drivers who already have collision, a deductible waiver often makes more sense than UMPD. Collision pays regardless of fault and isn’t capped at $3,500, while UMPD only applies when the uninsured driver is identified and runs out quickly.
The Two-Year Deadline to Act
California gives you two years from the date of the accident to preserve your UM claim. Within that window, you have to do one of three things: file a lawsuit against the uninsured driver, reach a settlement with your insurer, or formally start arbitration by sending your insurer written notice via certified mail.1California Legislative Information. California Insurance Code 11580.2 – Uninsured Motorist Coverage Miss the two-year deadline and you lose the right to collect under your UM coverage.
Most UM disputes go to arbitration rather than court. A single neutral arbitrator decides both whether you’re entitled to damages and how much. The decision is binding between you and your insurer for the UM claim itself.