Underinsured motorist coverage

What is underinsured motorist coverage?

Picture this: you're stopped at a red light, minding your own business, when someone rear-ends you. The other driver has insurance, but their policy limits are so low they barely cover your emergency room bill, let alone your ongoing medical care or the weeks you spent unable to work. That's exactly the scenario underinsured motorist coverage is designed for. It steps in to cover the gap between what the at-fault driver's insurance pays and what your actual damages add up to.

Underinsured motorist coverage, often abbreviated as UIM, is a type of auto insurance coverage that protects you when another driver causes an accident but doesn't carry enough liability insurance to fully compensate you for your injuries or losses. Depending on your state and your policy, it can cover medical expenses, lost wages, pain and suffering, and more. It's one of those coverages that's easy to overlook until you actually need it.

How underinsured motorist coverage works

UIM coverage doesn't activate the moment an accident happens; there's a specific trigger. First, the at-fault driver's liability insurance has to pay out its maximum policy limit. Once that's exhausted and a coverage gap still exists, your underinsured motorist coverage can kick in to help cover the remaining costs, up to your own UIM policy limits.

Here's a simple example to make that concrete. Say the driver who hit you carries $25,000 in bodily injury liability coverage, but your medical bills and lost wages total $80,000. After their insurance company pays the $25,000 maximum, you're still left with $55,000 in uncovered losses. If you have UIM coverage with a limit of $100,000, your own insurance company can step in to cover that remaining amount. Without it, you'd be left pursuing the at-fault driver personally which, in most cases, isn't a realistic path to financial recovery.

Underinsured vs. uninsured motorist coverage

These two coverages often come packaged together, which makes sense because they're solving versions of the same problem. Uninsured motorist (UM) coverage applies when the at-fault driver has no insurance at all, they simply don't have a policy. Underinsured motorist coverage applies when they do have insurance, but the limits they carry fall short of covering your total losses.

Think of them as a two-part safety net. In states where minimum liability requirements are low, both coverages work together to protect you from the real-world gap between the minimum legal requirement and what accidents actually cost. Some states require both, some require only one and some offer them as optional add-ons, so knowing what's available in your state matters.

What underinsured motorist coverage can pay for

UIM coverage is broader than many drivers realize. It's not just for dramatic accidents , it can come into play in a range of situations where another driver's insurance comes up short.

• Medical expenses – UIM can help cover hospital bills, surgeries, rehabilitation and ongoing treatment costs that exceed the at-fault driver's liability limits.
• Lost income – If your injuries keep you out of work, UIM coverage may help replace the wages you lose during your recovery period.
• Pain and suffering – Beyond the financial losses, UIM can account for physical pain and emotional distress resulting from the accident.
• Funeral expenses – In the most tragic cases, UIM coverage may help cover funeral and burial costs if a family member is killed in an accident caused by an underinsured driver.
• Property damage – Some policies include underinsured motorist property damage (UMPD) coverage, though this varies by state and insurance company.

Coverage specifics vary by state and policy, so it's worth reviewing exactly what your UIM coverage includes with a VIU by HUB Advisor before you assume you're fully protected.

How much underinsured motorist coverage do you need?

There's no single right answer here, but a good starting point is to match your UIM limits to your bodily injury liability limits. The reasoning is straightforward: if you believe other drivers should carry enough coverage to fully protect someone they injure, your own coverage should meet that same standard. It's a consistency check that also tends to provide meaningful protection.

Beyond that benchmark, think about your personal financial picture. If you have significant assets, high earning potential or existing health coverage with gaps, you may want to carry higher UIM limits to protect against serious accidents. Medical bills and lost wages from a significant injury can escalate quickly, and the difference between $50,000 and $250,000 in UIM coverage is often a surprisingly small addition to your premium. The VIU by HUB Advisory Team can help you look at your full auto policy and figure out the right limits for your specific situation.

Is underinsured motorist coverage required?

State laws vary significantly on this one. Some states require drivers to carry UIM coverage, others require insurance companies to offer it but allow drivers to waive it in writing, and some treat it as entirely optional. Even in states where it's not mandatory, waiving it means taking on real financial risk, particularly given how many drivers on the road carry only the state's minimum required liability limits.

If you're not sure what your state requires or what your current policy includes, it's a quick conversation worth having. Checking your declarations page is a good first step, and the VIU by HUB Advisory Team is always available to walk you through your coverage.

Frequently asked questions about underinsured motorist coverage

Does underinsured motorist coverage apply if I'm hit as a pedestrian or cyclist?

In many states, yes, your UIM coverage can protect you even when you're not behind the wheel. If you're struck by an underinsured driver while walking, biking or even riding as a passenger in someone else's vehicle, your own auto policy's UIM coverage may still apply. This is one of the more surprising aspects of the coverage, and it's worth confirming with your insurance company how your specific policy handles these scenarios.

What's the difference between stacked and unstacked UIM coverage?

Stacking allows you to combine UIM coverage limits across multiple vehicles on your policy, effectively multiplying your protection. If you have two cars each with $100,000 in UIM coverage and your state allows stacking, you'd have access to $200,000 in total UIM limits for a single claim. Not all states permit stacking, and some insurance companies price it differently, so it's a good question to raise when you're shopping for or reviewing your auto coverage.

Will filing a UIM claim raise my rates?

Filing a claim with your own insurance company for underinsured motorist coverage could potentially affect your rates, though many insurance companies treat UIM claims more favorably than at-fault claims since the accident wasn't your fault. The specifics depend on your insurance company, your state's regulations and your claims history. It's a reasonable concern to raise with a VIU by HUB Advisor before you file, so you can make an informed decision.

Can I negotiate with the at-fault driver's insurance company first?

Yes, and in most cases you'll need to. Your UIM coverage typically doesn't activate until the at-fault driver's liability policy has paid its maximum limit. That usually means settling with or receiving payment from the other driver's insurance company before your own UIM claim process begins. Your insurance company may also need to approve any settlement with the at-fault driver's insurance company before you accept it, to protect their right to seek reimbursement later.