When the Other Driver’s Insurance Is Not Enough

May 16, 2026

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What Underinsured Driver Injury Claims Involve

Underinsured driver injury claims arise when the at fault driver has insurance, yet the policy limit is too low to cover the harm. California’s minimum liability limits are modest, so a serious injury can exceed them quickly. In that situation, the injured person looks for other sources of payment. Those may include their own underinsured motorist coverage, another responsible party or, in some cases, the driver’s personal assets.

California Minimum Limits

California raised its minimum liability limits for policies issued or renewed on or after January 1, 2025. The new minimums are $30,000 per person and $60,000 per accident for injuries, plus $15,000 for property damage. The California DMV lists those requirements.

Many drivers carry only the minimum. So a crash causing surgery or long time off work can easily exceed $30,000. When a crash injures several people, they all share the per accident limit.

Finding the Other Driver’s Limits

Insurers do not always share policy limits early. Still, you or your lawyer can ask in writing. Some insurers disclose limits when shown medical records that suggest the claim exceeds them. Write down the date of each request and any answer.

Also ask whether the driver had more than one policy. An umbrella policy, a business policy or a policy covering a borrowed car may add coverage. For more on limits, see first party insurance claims.

Your Own Underinsured Coverage

California Insurance Code section 11580.2 addresses uninsured and underinsured motorist coverage. Many auto policies include underinsured coverage alongside uninsured coverage. Check your declarations page for the letters UIM or a similar label.

Read the underinsured section of your policy carefully. It explains when the coverage applies, how other payments affect it and what notice your insurer needs. Some policies require notice or consent before you settle with the at fault driver. So tell your insurer in writing before accepting any offer.

Other Responsible Parties in Underinsured Driver Injury Claims

A driver working at the time may bring the employer’s coverage into the claim. Likewise, a vehicle owner who lent the car may have coverage. A road defect or a vehicle defect can add another party. Each possibility depends on the facts, though looking for them early can make a real difference.

California law shapes how several defendants share damages. For noneconomic damages, each defendant generally pays only its own share of fault. That rule makes identifying every party important. For more, see California comparative negligence.

Health Insurance and Medical Payments

Health insurance often pays medical bills first. Then it may seek repayment from a settlement. Medical payments coverage on your own auto policy may also help with bills, regardless of fault. For how repayment works, see California subrogation law.

These sources do not replace pain and suffering or lost income. Still, they can reduce the financial pressure while the claim continues.

The Driver’s Personal Assets

An injured person can sometimes pursue a judgment beyond the policy limit. In practice, though, many drivers lack assets to pay it. Collecting can take years. So most underinsured claims focus on insurance first.

Settling for the Limit

When the other insurer offers its full limit, that offer deserves careful thought. Accepting it usually requires signing a release. Before signing, confirm that the release does not harm your rights against your own insurer or other parties. Also check for liens from health plans or hospitals.

Evidence for Underinsured Driver Injury Claims

  • The other driver’s insurance information and limits
  • Your own policy declarations page
  • Medical records and bills showing the full cost
  • Pay records showing lost income
  • Letters to and from each insurer

Keep these in one folder. The full picture of your losses supports both the claim against the driver and any claim on your own policy.

Several Injured People and One Policy

Crashes with several injured people create a special problem. Each person may have a valid claim, yet all of them draw from the same limited policy. The insurer may try to settle with some claimants first. Then little may remain for the others.

So if you were one of several people hurt, tell the insurer early and keep records of your injuries. Some insurers prefer to resolve all claims together and divide the limit by agreement. A lawyer can help coordinate those talks. Meanwhile, look at your own underinsured coverage, because it may become the main source of payment once the other policy runs out.

Questions to Ask Early

Ask the adjuster for the policy limit, the number of claimants and whether any other policy applies. Then ask your own insurer whether you have underinsured coverage and what notice it needs. Write each answer down with the date. Those few questions often shape the whole path of the claim.

Timing in Underinsured Driver Injury Claims

Policy deadlines and lawsuit deadlines may differ. So track both, and act early. Because underinsured claims often involve several insurers at once, a missed notice to one of them can cause delays. Keep a simple calendar with every date.

This article is general information, not legal advice. Laws change and every situation is different.