📋 What is UM/UIM Coverage?
Uninsured Motorist (UM) and Underinsured Motorist (UIM) coverage protects you when you're injured by a driver who either has no insurance or insufficient insurance to cover your damages. In California, UM coverage is mandatory - every auto insurance policy must include it unless you specifically reject it in writing. When insurers wrongfully deny or undervalue these claims, policyholders have powerful legal remedies.
Understanding UM vs. UIM Coverage
🚗 Uninsured Motorist (UM)
Covers you when hit by a driver with no liability insurance, a hit-and-run driver, or a driver whose insurer is insolvent
💰 Underinsured Motorist (UIM)
Covers the gap when the at-fault driver's policy limits are insufficient to cover your full damages
✅ Mandatory in California
Cal. Ins. Code 11580.2 requires all auto policies to include UM coverage unless validly waived in writing
🛡 First-Party Claim
You're claiming against your own insurer, who owes you a duty of good faith and fair dealing
When to Use This Guide
Use this guide if your California auto insurer has:
❌ Denied Your UM/UIM Claim
▼Your insurer rejected your claim outright, claiming you weren't covered, the accident wasn't covered, or the at-fault driver was actually insured. Common wrongful denial reasons include: claiming you weren't in a "covered vehicle," disputing that the other driver was uninsured, or alleging policy exclusions apply.
💰 Lowballed Your Settlement
▼Your insurer offered far less than your claim is worth. Common tactics include undervaluing medical expenses, disputing the necessity of treatment, minimizing pain and suffering, or claiming pre-existing conditions caused your injuries.
🕑 Delayed Processing Your Claim
▼Your insurer is unreasonably delaying investigation, evaluation, or payment of your valid claim. Under California regulations, insurers must acknowledge claims within 15 days and accept/deny within 40 days of receiving proof of claim.
🔍 Failed to Properly Investigate
▼Your insurer denied or undervalued your claim without conducting a thorough, fair, and timely investigation. This includes failing to obtain all relevant medical records, ignoring your treating physicians' opinions, or relying on biased "independent" medical exams.
👍 What You Can Recover in a UM/UIM Claim
- Medical expenses - Past and future medical treatment related to your injuries
- Lost wages - Income lost due to your injuries and recovery
- Loss of earning capacity - Diminished future earning potential
- Pain and suffering - Physical pain and emotional distress
- Property damage - Vehicle repair or replacement costs
- Policy limits - Up to your full UM/UIM coverage amount
⚠ Critical Deadlines
California has strict time limits for UM/UIM claims:
- Statute of limitations: 2 years from the date of the accident (CCP 335.1)
- Policy notice requirements: Check your policy for claim filing deadlines
- Arbitration demand: Must be filed within the limitations period
Do not delay - the 2-year deadline is strictly enforced.
⚖ Legal Basis
California provides strong protections for UM/UIM policyholders. These statutes and landmark cases support your claim for fair compensation.
Key California Statutes
California Insurance Code Section 11580.2
The cornerstone of California UM/UIM law. This statute mandates that every automobile liability insurance policy issued in California must provide UM coverage in specified minimum amounts ($30,000/$60,000) unless the insured affirmatively waives coverage in writing. The waiver must be on a specific form. This statute also governs UIM coverage, stacking rules, and arbitration procedures.
California Insurance Code Section 11580.2(i)
Establishes the mandatory arbitration procedure for UM/UIM disputes. When the insurer and insured cannot agree on the amount of damages, either party may demand arbitration. The arbitration decision is binding, though it may be appealed to court on limited grounds.
California Insurance Code Section 790.03(h)
Enumerates unfair claims settlement practices that apply to UM/UIM claims. Violations include: failing to promptly investigate claims, misrepresenting policy provisions, failing to affirm or deny coverage within reasonable time, and not attempting good faith settlement when liability is clear.
California Code of Civil Procedure Section 335.1
Establishes the 2-year statute of limitations for personal injury claims, which applies to UM/UIM claims. The clock starts running from the date of the accident, not from the date of denial.
California Code of Regulations, Title 10, Section 2695.7
Fair Claims Settlement Practices Regulations. Requires insurers to: acknowledge claims within 15 days, begin investigation immediately, accept or deny claims within 40 days of receiving proof of claim, and provide written explanation for any denial.
Landmark California UM/UIM Cases
📖 Mercury Insurance Co. v. Pearson (2008) 169 Cal.App.4th 1064
Held that an insurer's failure to timely pay UM benefits when liability is reasonably clear can constitute bad faith. The court recognized that UM coverage exists to protect the insured, and unreasonable delay in payment defeats this purpose.
📖 Quintano v. Mercury Casualty Co. (1995) 11 Cal.4th 1049
The California Supreme Court confirmed that insurers owe the same duty of good faith and fair dealing in UM/UIM claims as in all other first-party insurance claims. An insurer cannot prioritize its own financial interests over the insured's legitimate claim.
📖 Egan v. Mutual of Omaha Insurance Co. (1979) 24 Cal.3d 809
Established that punitive damages are available against insurers who act with malice, oppression, or fraud in handling first-party claims, including UM/UIM claims. This case remains foundational for bad faith claims.
📖 Brandt v. Superior Court (1985) 37 Cal.3d 813
Established that attorney fees incurred to obtain policy benefits (including UM/UIM benefits) are recoverable as damages in a bad faith action. These "Brandt fees" are in addition to policy limits and other damages.
📖 State Farm Mutual Auto. Ins. Co. v. Crane (1990) 217 Cal.App.3d 1127
Confirmed that an arbitration award in a UM/UIM case does not preclude a subsequent bad faith action. The insured can pursue bad faith damages even after receiving the arbitration award if the insurer acted unreasonably.
💡 UM/UIM Arbitration Is Mandatory
Under Cal. Ins. Code 11580.2(i), disputes over the amount of UM/UIM damages must go to binding arbitration unless both parties agree otherwise. However, coverage disputes (whether the policy covers the claim at all) can be decided by courts. Bad faith claims are also litigated in court, not arbitration.
💰 Damages & Recoverable Amounts
Understanding what you can recover helps you value your claim accurately. UM/UIM claims can include both policy benefits and, in bad faith cases, additional damages.
UM/UIM Policy Benefits
| Damage Category | Description |
|---|---|
| Medical Expenses | All reasonable and necessary medical treatment: emergency care, hospitalization, surgery, physical therapy, chiropractic care, medications, and future medical needs. |
| Lost Wages | Income lost during recovery, including salary, hourly wages, bonuses, commissions, and self-employment income. Must be documented with pay stubs and employer verification. |
| Loss of Earning Capacity | Reduced ability to earn in the future due to permanent injuries. Often requires vocational expert testimony to establish. |
| Pain and Suffering | Physical pain, discomfort, and limitations on daily activities. California allows significant recovery for non-economic damages. |
| Emotional Distress | Anxiety, depression, PTSD, and other psychological impacts from the accident and injuries. |
| Loss of Enjoyment of Life | Inability to participate in activities and hobbies you enjoyed before the accident. |
Bad Faith Damages (If Insurer Acts Wrongfully)
If your insurer unreasonably denies, delays, or undervalues your UM/UIM claim, you may recover additional damages:
💰 Brandt Attorney Fees
Attorney fees incurred to obtain your UM/UIM benefits - recoverable as damages, not just costs
📈 Consequential Damages
Economic harm caused by the denial: credit damage, lost investments, foreclosure costs, etc.
💔 Emotional Distress
Mental anguish from the insurer's bad faith conduct - separate from accident-related distress
⚠ Punitive Damages
Available when insurer acted with malice, oppression, or fraud - no statutory cap
📊 Sample UM/UIM Damages Calculation
Example: Moderate Injury - Herniated Disc, 6 Months Treatment
⚠ UIM Offset Rule
In California, your UIM recovery is reduced by any amount you receive from the at-fault driver's liability insurance. For example, if you have $100,000 UIM coverage and receive $30,000 from the at-fault driver's policy, your maximum UIM recovery is $70,000, even if your damages exceed $100,000. This is called the "limits credit" or "offset" rule.
💡 Policy Limits and Stacking
California law generally prohibits "stacking" UM/UIM coverage from multiple vehicles on the same policy. However, you may be able to stack coverage from different policies (e.g., your policy and a household member's separate policy). Check your specific policy language and consult with an attorney about stacking options.
✅ Evidence Checklist
Gather these documents before sending your demand letter. Click to check off items as you collect them.
📄 Policy Documents
- ✓ Complete auto insurance policy with declarations page
- ✓ UM/UIM coverage endorsements and limits
- ✓ Premium payment records showing policy was in effect
- ✓ Any UM/UIM waiver forms (or lack thereof)
🚗 Accident Documentation
- ✓ Police report with report number
- ✓ Photos of accident scene, vehicles, and injuries
- ✓ Witness statements and contact information
- ✓ Proof the at-fault driver was uninsured/underinsured
- ✓ DMV records showing other driver's insurance status
🏥 Medical Records
- ✓ Emergency room records and bills
- ✓ All treating physician records and notes
- ✓ Diagnostic imaging (X-rays, MRIs, CT scans)
- ✓ Physical therapy records
- ✓ Prescription records and pharmacy bills
- ✓ Future care estimate from treating physician
💰 Financial Losses
- ✓ Pay stubs for 3-6 months before accident
- ✓ Employer verification of time missed
- ✓ Tax returns (if self-employed)
- ✓ Vehicle repair estimates or total loss valuation
- ✓ Rental car receipts
📩 Insurance Communications
- ✓ Claim acknowledgment letter
- ✓ All correspondence with your insurer
- ✓ Denial letter with stated reasons
- ✓ Settlement offers and your responses
- ✓ Recorded statements you provided
📖 Additional Evidence
- ✓ Pain journal documenting daily symptoms
- ✓ Photos showing injuries over time
- ✓ Declarations from family/friends about limitations
- ✓ Documentation of activities you can no longer do
🔒 Request Your Complete Claim File
Under California law, you are entitled to a copy of your entire claim file. Send a written request to your insurer demanding all documents, notes, evaluations, and communications related to your UM/UIM claim. This file may reveal evidence of bad faith, including adjuster notes showing they ignored favorable evidence or were pressured to deny claims.
📝 Sample Language
Copy and customize these paragraphs for your California UM/UIM demand letter. Each addresses a different scenario or element of your claim.
- Medical expenses (past and future): $[AMOUNT]
- Lost wages: $[AMOUNT]
- Pain and suffering: $[AMOUNT]
- Total: $[TOTAL]
If this demand is not satisfied by [DEADLINE DATE], I will immediately demand arbitration pursuant to California Insurance Code Section 11580.2(i) and will pursue a separate bad faith action in the California Superior Court seeking Brandt fees, consequential damages, and punitive damages.
📄 Full Sample Demand Letter
Below is a complete, ready-to-use UM/UIM demand letter template. Replace all bracketed placeholders with your specific information.
Complete UM/UIM Denial Demand Letter Template
💡 Tips for Using This Template
- Customize all bracketed sections - Replace every [PLACEHOLDER] with your specific information
- Attach all exhibits - Include copies of all documents referenced in the letter
- Send via certified mail - This creates proof of delivery and receipt
- Keep copies - Retain copies of everything you send for your records
- Follow up in writing - If you call, follow up with a letter confirming the conversation
🚀 Next Steps
What to do after sending your UM/UIM demand letter.
Expected Timeline
Days 1-15
Insurer receives and acknowledges your demand letter; begins internal review
Days 15-30
Response expected: payment, improved settlement offer, or continued denial
Days 30+
If no satisfactory response, proceed to arbitration demand and/or bad faith litigation
If They Don't Pay or Respond Adequately
-
Demand Arbitration
Under Cal. Ins. Code 11580.2(i), you can demand binding arbitration for UM/UIM disputes over the amount of damages. Send a written arbitration demand to your insurer. The parties will select an arbitrator (or have one appointed) who will decide the value of your claim.
-
Consult an Auto Accident / Insurance Attorney
Many California attorneys handle UM/UIM cases on contingency (no fee unless you win). Given potential Brandt fee recovery and punitive damages in bad faith cases, strong claims are attractive to plaintiffs' attorneys. An attorney can handle arbitration and any bad faith litigation.
-
File a Bad Faith Lawsuit
If your insurer acted unreasonably, you can file a bad faith lawsuit in California Superior Court - separate from and in addition to arbitration. Bad faith claims allow recovery of Brandt fees, emotional distress, consequential damages, and punitive damages.
-
File a Department of Insurance Complaint
File a complaint at insurance.ca.gov. While this doesn't directly get you paid, it creates a regulatory record of the insurer's conduct and may prompt faster action on your claim.
⚠ Watch the Statute of Limitations
- UM/UIM claims: 2 years from the date of the accident (CCP 335.1)
- Bad faith claims: 2 years from the wrongful denial or conduct (CCP 339)
The arbitration demand must be made within the 2-year limitations period. Do not wait until the last minute - file your demand or lawsuit with time to spare.
Need Legal Help?
UM/UIM claims can involve complex arbitration procedures and bad faith litigation. Get a 30-minute strategy call with an insurance attorney to evaluate your case and discuss next steps.
Book Consultation - $125California Resources
- California Department of Insurance: insurance.ca.gov - File complaints and check insurer history
- California Insurance Code 11580.2: Full text of UM/UIM statute
- California Courts Self-Help: selfhelp.courts.ca.gov - Free forms and filing guides
- State Bar Lawyer Referral: calbar.ca.gov - Find a certified specialist
- AAA (American Arbitration Association): adr.org - UM/UIM arbitration information
📖 Related Articles
Deepen your understanding with our comprehensive blog guides on California insurance claims.