Key Takeaways
- Covers injuries when at-fault driver’s insurance is too low.
- Protects policyholder, passengers, and family members.
- Available as optional or required coverage depending on state.
- Includes medical, lost wages, pain, and property damage costs.
What is Underinsured Motorist Coverage?
Underinsured Motorist (UIM) coverage is an auto insurance add-on that protects you and your passengers if an at-fault driver’s liability insurance is insufficient to cover your damages. It activates after the at-fault driver’s policy limits are exhausted, covering costs like medical expenses and lost wages. This coverage differs from uninsured motorist insurance by addressing drivers who have insurance but not enough to fully compensate your losses.
UIM coverage is regulated by state laws and often requires adherence to principles like uberrimae fidei contract, ensuring full disclosure between insurer and insured.
Key Characteristics
Understanding the core features of underinsured motorist coverage helps you evaluate its suitability for your policy.
- Coverage Scope: Primarily covers bodily injury but can include property damage if you opt for the add-on.
- Policy Limits: Your UIM limits typically set the maximum payout, supplementing the at-fault driver’s exhausted coverage.
- Mandatory vs. Optional: Some states require UIM coverage, while others offer it as optional protection.
- Family and Passenger Protection: Covers injuries to family members and passengers, even if they are not named on your policy.
- Claims Process: You must first exhaust the at-fault driver’s liability coverage before UIM pays out, reflecting an obligation principle in insurance contracts.
How It Works
When you are injured in an accident caused by a driver whose insurance limits are too low, UIM coverage kicks in to pay the difference up to your policy limits. For example, if your medical bills total $50,000 but the at-fault driver only has $25,000 in liability coverage, your UIM policy can cover the remaining $25,000.
Insurance companies assess these claims using factors like your damages, the at-fault driver’s policy limits, and your own coverage terms. Understanding your earned premium and how it relates to your coverage can help you gauge the cost-effectiveness of adding UIM protection.
Examples and Use Cases
Real-world scenarios illustrate the benefits of having underinsured motorist coverage:
- Medical Gap Scenario: After a collision, your $50,000 hospital bill is only partially covered by the at-fault driver’s $25,000 insurance; your UIM fills the remaining gap.
- Property Damage Add-On: If your vehicle repair costs $20,000 but the at-fault driver’s property damage coverage is $15,000, UIM can cover the rest plus rental expenses.
- Passenger Injuries: A passenger injured in your car can claim under your UIM, ensuring wider protection.
- Industry Examples: Major companies like Delta and American Airlines emphasize comprehensive insurance coverage, reflecting the importance of mitigating underinsurance risks in their operations.
- Credit Card Benefits: Pairing UIM with financial tools such as low-interest credit cards can help manage unexpected expenses arising from accidents.
Important Considerations
Check your state’s specific requirements for UIM coverage, as regulations and mandatory minimums vary widely. Understanding stacking rules and policy exclusions is crucial to maximize your protection. Consulting with your insurer about how UIM fits into your overall insurance portfolio can prevent coverage gaps.
Additionally, staying informed about industry standards from organizations like the NAIC can help you make well-informed decisions regarding your auto insurance coverage.
Final Words
Underinsured Motorist Coverage fills critical gaps when the at-fault driver’s insurance falls short, safeguarding you from significant out-of-pocket expenses. Review your current policy limits and consider adding or adjusting UIM coverage to ensure adequate protection.
Frequently Asked Questions
Underinsured Motorist (UIM) coverage is an auto insurance add-on that protects you and your passengers if injured by a driver whose liability insurance is too low to cover your damages. It helps cover costs like medical bills, lost wages, and pain and suffering after the at-fault driver's policy limits are exhausted.
UIM coverage applies when the at-fault driver has insurance but their coverage limits are insufficient, while Uninsured Motorist (UM) coverage protects you if the at-fault driver has no insurance or if it's a hit-and-run. Both coverages help fill gaps in compensation but apply in different situations.
No, UIM coverage requirements vary by state. It is mandatory in states like Connecticut, Illinois, and Maryland, but optional in many others. It's important to check your state's rules and decide if adding UIM coverage makes sense for your protection.
UIM coverage generally helps pay for medical expenses, lost wages, pain and suffering, and sometimes property damage like vehicle repairs. Coverage can extend to you, your family members, and passengers injured in the accident.
UIM coverage activates only after the at-fault driver's liability insurance is fully used up. For example, if their policy covers $25,000 but your damages are $50,000, your UIM coverage can help cover the remaining $25,000, up to your policy limits.
Yes, UIM coverage often protects passengers injured in your vehicle, even if they are not listed on your policy. This helps ensure medical bills and other damages for passengers are covered if the at-fault driver’s limits are insufficient.
Property damage coverage under UIM is usually offered as an add-on and may require an extra premium. It can cover vehicle repairs, rental costs, or diminished vehicle value when the at-fault driver’s property damage limits don’t fully pay for your damages.
If the at-fault driver’s limits match your UIM limits, claims can become more complicated. You must exhaust the at-fault driver’s policy first, and your insurer may review the specifics carefully before paying any additional amount.

