The Coverage California Doesn't Require
You're reviewing your California auto insurance policy and trying to understand whether uninsured motorist coverage is something you must carry or something you can decline. California law does not require you to carry uninsured motorist (UM) or underinsured motorist (UIM) coverage.
That legal reality creates a structural gap. The state mandates that you carry liability insurance to pay for damage you cause to others, but it does not mandate that you carry coverage to protect yourself when an uninsured driver hits you. The decision to add UM/UIM coverage is yours, and it hinges on understanding the actual risk you face on California roads.
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Get Your Free QuoteCalifornia Uninsured Driver Rate
20.4%
One in five California drivers operates without insurance, per 2023 data. That rate is among the highest in the nation, and it means the driver who hits you has a significant probability of carrying no liability coverage to pay your claim.
Insurance Research Council, 2023
What Uninsured Motorist Coverage Actually Pays
Uninsured motorist bodily injury coverage pays your medical bills, lost wages, and pain-and-suffering damages when an uninsured driver causes an accident that injures you or your passengers. Underinsured motorist coverage does the same when the at-fault driver carries liability limits too low to cover your damages. Both coverages step in where the other driver's liability insurance fails — either because it doesn't exist or because it's exhausted.
California also offers uninsured motorist property damage (UMPD) coverage, which pays for damage to your vehicle when an uninsured driver hits you. UMPD is distinct from collision coverage: collision pays regardless of fault and regardless of whether the other driver has insurance, but it requires you to pay a deductible. UMPD has no deductible in California, but it only applies when the at-fault driver is uninsured and you can identify the driver and vehicle.
The coverage does not apply to hit-and-run accidents unless you purchased the uninsured motorist property damage endorsement with a hit-and-run provision, which some carriers offer as an add-on. Standard UMPD requires that you identify the at-fault driver.
California carriers must offer you UM/UIM coverage when you purchase a policy, but you can decline it in writing. That declination is binding unless you later request the coverage.
How the Offer and Declination Process Works
When you apply for coverage, the carrier presents UM/UIM as an option with limits that match your liability limits unless you choose lower limits. If you decline the coverage, you must do so in writing — either by signing a declination form or by completing an electronic declination during the online application process. That signed declination stays on file with the carrier and remains in effect for the life of the policy unless you affirmatively request the coverage later.
If you did not decline UM/UIM coverage in writing, the carrier must include it on your policy at limits equal to your bodily injury liability limits. The coverage is presumed accepted unless you explicitly reject it. This means that many California drivers carry UM/UIM coverage without realizing it, because they never signed a declination form and the carrier added the coverage by default.
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The Gap Between Liability Minimums and Actual Protection
Those minimums were set decades ago and have not kept pace with medical costs or vehicle repair costs.
When an uninsured driver hits you, your own liability coverage does not pay your claim. Liability insurance only pays for damage you cause to others. If the at-fault driver has no insurance, you are left to sue the driver personally — a process that is slow, expensive, and often unproductive because uninsured drivers typically lack assets to satisfy a judgment. Uninsured motorist coverage eliminates that gap by paying your claim directly, up to your UM policy limits, without requiring you to sue anyone.
The structural risk is highest in metro areas with dense traffic and high uninsured-driver concentrations. California's 20.4% uninsured rate translates to more than 5.6 million uninsured drivers on the road, based on the state's 27.6 million licensed drivers. In a multi-vehicle household, the probability that at least one vehicle will be involved in an accident with an uninsured driver over a five-year policy period is significant.
California Minimum Bodily Injury Limits
$15,000 / $30,000
These minimums represent the floor, not a recommendation. A serious injury claim can exhaust $15,000 in a single emergency-room visit, leaving you to cover the remaining costs out of pocket if the at-fault driver is uninsured or underinsured.
California Insurance Code §11580.1b
When Declining UM Coverage Makes Sense
Declining uninsured motorist coverage is a rational decision in specific circumstances. If you carry health insurance with low out-of-pocket maximums and your household has sufficient savings to cover a vehicle total loss without financial hardship, the incremental protection UM/UIM provides may not justify the premium. If you already carry collision and comprehensive coverage with low deductibles, UMPD adds little additional value because collision covers the same vehicle damage regardless of the other driver's insurance status.
Some households decline UM/UIM coverage because they prioritize keeping the premium as low as possible and are willing to accept the risk of an uninsured-driver accident. Declining UM/UIM on a minimum-limits policy, by contrast, leaves you exposed to the full cost of an uninsured-driver accident with no fallback.
Adding UM Coverage After Initial Declination
If you declined uninsured motorist coverage when you first purchased your policy, you can add it at any time by contacting your carrier and requesting the coverage. The carrier will add UM/UIM to your policy effective the date of your request, and your premium will increase to reflect the additional coverage. There is no waiting period and no underwriting review required — the coverage is available on request.
Most California carriers allow you to add UM/UIM coverage online through your account portal or by phone. The process takes minutes, and the coverage binds immediately. If you are approaching renewal, you can request the coverage as part of the renewal process, and it will appear on your renewed policy declarations. The key procedural point: once you decline UM/UIM in writing, it does not automatically reappear on your policy at renewal. You must affirmatively request it.