Uninsured & Underinsured Motorist Coverage in California: A Complete Guide

What California Law Requires

California Insurance Code § 11580.2 requires all auto insurers to offer UM/UIM coverage. You can waive it in writing, but doing so is almost always a mistake. This educational organizer helps users prepare records and questions for attorney review. It does not provide legal advice or predict a result. This educational organizer helps users prepare records and questions for attorney review. It does not provide legal advice or predict a result. The premium difference is modest; the protection is enormous.

Uninsured Motorist (UM) Coverage: What It Covers

UM coverage pays for your injuries when you are hit by a driver who has no liability insurance at all, or by a hit-and-run driver who cannot be identified. A licensed attorney can review the facts, evidence, coverage, and applicable law for an individual matter. In California, UM coverage also extends to passengers in your vehicle and, in some circumstances, to pedestrian accidents. Importantly, UM coverage is first-party coverage — you are making a claim against your own insurer.

Underinsured Motorist (UIM) Coverage: When the Other Driver's Insurance Isn't Enough

UIM coverage applies when the at-fault driver has insurance, but their policy limits are insufficient to cover your damages. This educational organizer helps users prepare records and questions for attorney review. It does not provide legal advice or predict a result. Your UIM coverage can make up the difference, up to your UIM policy limits. In California, UIM coverage is 'excess' coverage — it pays the gap between the at-fault driver's policy limits and your actual damages, not the full amount of your damages minus your deductible.

How to Make a UM/UIM Claim

Report the accident to your insurer promptly and notify them that you intend to make a UM/UIM claim. Your insurer will investigate the claim — but remember, even your own insurer has a financial incentive to minimize your payout. Document everything: medical records, bills, lost wage documentation, and evidence of pain and suffering. A licensed attorney can review the facts, evidence, coverage, and applicable law for an individual matter. Once you sign a release, you cannot reopen the claim.

UM/UIM Arbitration in California

Most California UM/UIM policies require binding arbitration to resolve disputes about coverage or the amount owed — you cannot sue your own insurer in court for a UM/UIM dispute (with limited exceptions). Arbitration is a private proceeding before a neutral arbitrator. While faster than litigation, the outcome is final and binding. Having an experienced attorney represent you in arbitration is critical — insurance companies send experienced adjusters and lawyers to arbitration; you should too.

Bad Faith UM/UIM Claims

Your insurer has a legal duty to handle your UM/UIM claim fairly and in good faith. A licensed attorney can review the facts, evidence, coverage, and applicable law for an individual matter. A licensed attorney can review the facts, evidence, coverage, and applicable law for an individual matter.

Key Takeaways

• 1 in 7 California drivers is uninsured — UM/UIM coverage is essential
• UM covers you when hit by an uninsured or hit-and-run driver
• UIM covers the gap when the at-fault driver's limits are too low
• Most UM/UIM disputes go to binding arbitration, not court
• Your own insurer can act in bad faith — document everything
• Never sign a UM/UIM release without understanding your full damages

Frequently Asked Questions