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Underinsured motorist claim basics

When the at-fault driver has insurance—but not enough. Plain-English education—not a quote or personalized advice.

Alex Rivera1 min read
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Educational only. PolicyPlain does not sell insurance and does not provide insurance, legal, or financial advice. Coverage rules and prices vary by state and insurer. Read our full disclaimer.

Underinsured motorist (UIM) coverage fills the gap when the other driver has insurance, but not enough for your bodily injury damages (and in some states, property damage themes).

Educational only—not a quote, recommendation, or personalized advice. Rules and policy forms vary by state and carrier.

Illustrative stack

  1. At-fault driver’s liability pays up to their limit
  2. Your UIM may pay remaining covered damages up to your UIM limit—minus what you already recovered
  3. Health insurance and PIP may also coordinate—order matters by state

Document medical bills, lost wages themes, and the third-party denial or limit exhaustion letter when pursuing UIM.

Related: Uninsured driver cover · Rejecting UM forms

Frequently asked questions

When does underinsured motorist coverage apply?+

Generally when an at-fault driver’s liability limits are exhausted or lower than your damages, and your policy’s UIM conditions are met. States define coordination differently.

Do I collect twice— from their insurer and mine?+

UIM usually coordinates with the at-fault party’s limits rather than paying full damages on top of a full recovery. Policy language controls.