California has one of the highest uninsured-driver rates in the country, and even drivers who do carry insurance often carry only the bare state minimum. Senate Bill 1107, the Protect California Drivers Act, raised minimum policy limits on January 1, 2025, for the first time since 1967. Even with those higher floors, the math falls apart fast after a serious crash. A broken ankle and a few weeks of rehab can blow through the at-fault driver’s policy by the end of the first month. That is when the conversation shifts. You stop chasing the at-fault carrier and turn to your own coverage. Uninsured Motorist (UM) and Underinsured Motorist (UIM) benefits are how injured Californians actually recover when the other side cannot pay.
What Is UM/UIM Coverage in California?
California Insurance Code section 11580.2 governs both. Every bodily-injury liability policy issued in the state must include an offer of UM and UIM coverage, and you can only opt out in writing on a specific section 11580.2 selection form. Most California drivers carry both without realizing how much protection they provide.
Uninsured Motorist (UM) Coverage
UM applies when the at-fault driver carries no insurance at all, when the at-fault carrier denies coverage or becomes insolvent, or in a hit-and-run where the other driver cannot be identified. Under section 11580.2, UM benefits operate the way the at-fault driver’s missing liability policy would have operated. They pay current and future medical bills, lost wages and reduced earning capacity, and general damages such as pain, suffering, and disfigurement. The cap is your own UM limit, not the other driver’s.
Underinsured Motorist (UIM) Coverage
UIM activates when the other driver has coverage but their limits are lower than your UIM limits and cannot cover your full damages. It is not a top-up that adds onto the at-fault policy. It is a separate first-party benefit triggered only after the at-fault limits are exhausted, and it pays the difference between what you collect and your own UIM ceiling — subject to offsets.
Who May Be Covered Under a UM/UIM Policy?
Coverage under CIC section 11580.2(b) reaches further than most people expect. The named insured and spouse are covered whether driving the listed vehicle, riding as a passenger, or traveling in someone else’s car. Household resident relatives — including children and many college students — are covered automatically. Permissive occupants of the insured vehicle are covered. If you or a household relative are walking, jogging, or cycling and a driver hits you, your own auto policy can still step in.
California’s 2025 Insurance Minimum-Limits Change Under SB 1107
What Changed in 2025
California’s liability minimums sat untouched for nearly six decades before SB 1107 took effect on January 1, 2025. The new floor is $30,000 per person and $60,000 per accident for bodily injury, plus $15,000 for property damage. The previous 15/30/5 minimums had been the rule since 1967.
Why the Increase Still May Not Be Enough
The new limits help, but a serious orthopedic injury or any neurosurgical procedure can clear $30,000 in a single weekend at a California hospital. A broken hip alone routinely produces six-figure medical bills before lost wages, future care, or pain and suffering. When the at-fault driver carries only the new minimum, that policy is often gone long before the injured person’s expenses stop.
When Your Own Insurance Policy Can Step In After a Crash
If the At-Fault Driver Has No Insurance
File a UM claim with your own carrier and treat it like a third-party lawsuit. You still have to prove the other driver caused the crash and document the full scope of your damages. The carrier will demand evidence — photos, the police report, witness statements, medical records — and may push for a recorded statement. Be careful with that.
If the Driver Flees the Scene
Hit-and-run claims fall under section 11580.2 too, but with extra hurdles. California requires that you report the crash to law enforcement within 24 hours. If the other vehicle never made physical contact — a so-called “phantom vehicle” — an independent witness must corroborate the event. Skip those steps and the carrier can deny.
If the Driver Has Insurance but Not Enough Coverage
This is the UIM scenario. You generally cannot collect UIM until the at-fault liability policy is exhausted, and California carriers typically require written consent before you accept any third-party settlement so they preserve their subrogation rights. Accepting the at-fault driver’s policy without notifying your UIM carrier first can wipe out the UIM claim entirely.
How UM/UIM Coverage Limits, Offsets, and Stacking Work
Understanding Offsets in California UIM Claims
California UIM is offset-based. If your UIM limit is $100,000 and you collect $30,000 from the at-fault driver, your UIM carrier owes the difference up to your own limit — not on top of it. That structure surprises a lot of injured drivers who assumed UIM would simply stack onto the at-fault recovery.
Does California Allow Stacking?
Stacking — combining limits across multiple vehicles or policies — is generally prohibited in California. There are narrow exceptions where multi-vehicle households carry separate policies with different carriers. The policy language controls, so read the declarations page.
Why Policy Language Matters
Most UM/UIM disputes turn on arbitration clauses, household-vehicle exclusions, named-driver exclusions, and notice requirements. Missing a notice deadline by a few days can defeat an otherwise valid claim. Review the policy line by line before talking to an adjuster.
What To Do Immediately After a Crash With an Uninsured or Underinsured Driver
Call law enforcement first and get a report number on scene. Photograph the vehicles, the road, traffic signs, and any visible injuries. Collect witness names and phone numbers before anyone leaves. See a doctor the same day — delayed treatment is the most common reason carriers reduce UM/UIM settlements. Notify your insurer a claim is coming, but keep the call short. Save every email, text, claim number, denial letter, and offer the carrier sends.
Common Problems in California UM/UIM Claims
Adjusters routinely argue the injuries are not as serious as the records show, that pre-existing conditions explain the symptoms, or that a treatment gap means the crash didn’t cause the harm. In hit-and-run files they question whether a phantom vehicle existed at all. They also use policy-limit pressure when multiple people compete for the same pool. Each move has a counter, but only if the claim is documented carefully from day one.
Can Passengers, Pedestrians, and Family Members Use UM/UIM Coverage?
Passengers are covered under the host driver’s UM/UIM policy and often under their own household policy too. Pedestrians and cyclists hit by uninsured or underinsured drivers can still pursue their own auto policy even though they were not in a car at the time. Resident relatives — including children at home and college students who still list the family address — are generally covered under the household policy.
How a California UM/UIM Lawyer Can Help Maximize Recovery
An experienced attorney looks for every available policy before settling: the host driver’s policy, the injured person’s household policy, employer coverage if the crash happened on the clock, umbrella policies, and rideshare layers. UM/UIM disputes often end in arbitration, and the framework rewards lawyers who know the carrier’s playbook. Coordinating the first-party claim with the third-party lawsuit, and handling medical liens, is what protects the final net recovery.
Frequently Asked Questions
What happens if an uninsured driver hits me in California?
You can usually file a UM claim against your own auto policy. Your insurer steps into the at-fault driver’s shoes and pays medical bills, lost wages, and pain and suffering up to your UM limit.
Does uninsured motorist coverage apply to hit-and-run accidents?
Yes, under California Insurance Code section 11580.2, but you must report the crash to law enforcement within 24 hours. If the other vehicle never made physical contact, an independent witness must confirm the event.
What is the difference between UM and UIM coverage?
UM applies when the other driver has no insurance. UIM applies when they have some, but not enough to cover your damages. Both pay through your own policy, capped by your limits.
Can I use my own insurance even if the crash was not my fault?
Yes. UM and UIM are first-party benefits. You are not at fault when you use them — that is the whole purpose of the coverage.
What changed under California SB 1107?
SB 1107 raised minimum liability limits to $30,000 per person, $60,000 per accident, and $15,000 in property damage, effective January 1, 2025. It was the first increase since 1967.
Injured by an Uninsured or Underinsured Driver in California?
If an uninsured or underinsured driver hit you in California, Big Ben Lawyers offers a free consultation to review every policy that might apply — yours, the at-fault driver’s, household policies, and any commercial coverage involved. We work on contingency. You do not pay unless we win. Call our Glendale office or any California location before your insurer’s notice deadlines run out.