Underinsured Motorist Claims: When the At-Fault Driver Doesn't Have Enough Insurance

If the driver who hit you carries insurance but not enough of it, the shortfall does not simply vanish. It becomes your problem unless you bought underinsured motorist coverage, which is the part of your own policy designed to pay the gap between what the at-fault driver's limits cover and what your losses actually come to. The Texas Department of Insurance describes it as being like buying an extra insurance policy to cover you when the driver who caused the accident did not have enough insurance. The important and slightly counterintuitive part: you file this claim with your own insurance company, not theirs.

How the gap opens up in the first place

State minimum liability limits are low relative to what a serious crash costs. Texas, for example, requires drivers to carry at least $30,000 of coverage for injuries per person, up to a total of $60,000 per accident, and $25,000 for property damage. Those numbers are the floor, and a great many drivers carry exactly the floor. One hospital stay, one surgery, or one multi-vehicle collision can exceed them, and when it does, the at-fault driver's insurer pays up to the limit and stops. What remains is uncollected unless the at-fault driver has personal assets worth pursuing, which is often not the case.

That is the situation underinsured motorist coverage exists for. It is not about drivers with no insurance at all, which is what uninsured motorist coverage handles. It is about drivers whose insurance was real but too small.

What an underinsured motorist claim can pay for

The coverage is usually broader than people assume. The Texas Department of Insurance lists uninsured and underinsured coverage as paying for:

• Car repairs and replacing the property that was in your car
• A rental car if you need one
• Medical bills for you and your passengers
• Pain and suffering costs
• Diminished value, if your car is worth less after the accident

The same coverage also responds in hit-and-run situations, where there is no other insurer to pursue at all. Exactly what is included varies by state and by policy, so read your own declarations page rather than assuming this list transfers.

You only have it if you bought it

This is where many drivers discover a gap after the fact. In most states, underinsured motorist coverage is optional for you but must be offered to you, and declining it takes a deliberate act. In Texas, insurance companies must offer uninsured motorist coverage when you buy auto insurance, and if you do not want it you have to turn it down in writing. South Carolina's Department of Insurance states plainly that underinsured coverage is not mandatory in that state, but describes a signed-form process in which the company documents your choice, and notes that if you do not return the form, the company will add the underinsured motorist coverage to your policy and rate you for the coverage.

If you are reading this after a crash, pull your declarations page and look for uninsured or underinsured motorist coverage and the limits next to it. That single line determines whether you have a claim to make.

How the claim actually runs

An underinsured motorist claim is built on top of the liability claim rather than instead of it, and the sequence matters. In broad terms:

• Notify your own insurer early, even before you know the other driver's limits are too low. Waiting to see how the liability claim develops can create problems later.
• Establish the at-fault driver's policy limits. Your claim is for what exceeds them, so the number has to be pinned down.
• Document your losses fully, since your own insurer will evaluate them the same way the other side would.
• Check your policy before accepting any settlement from the at-fault driver's insurer. Many policies require your insurer's consent before you settle, and settling without it can jeopardize your own claim.
• Expect your insurer to pursue the at-fault driver or their insurer for what it pays out, which is the ordinary subrogation process and is not something you need to manage.

The consent-to-settle point is the one that catches people. A quick offer from the other driver's insurer can look like a clean resolution and quietly cost you access to your own coverage. Ask your insurer in writing before you sign anything.

Deductibles and state-by-state differences

These claims are not always paid dollar-for-dollar from the first dollar. Texas, for instance, sets a $250 deductible for uninsured and underinsured motorist claims. Other states structure the coverage differently, including how the coverage stacks against the at-fault driver's limits and whether property damage and bodily injury are handled separately. These are state-specific rules, not national ones, so confirm the details with your state's insurance department or your own policy language.

Hit-and-run and phantom vehicles

The same coverage typically responds when the other driver cannot be identified, but there are often reporting requirements attached. Washington's Office of the Insurance Commissioner, for example, states that you must report a phantom vehicle accident to the police within 72 hours if you are making an auto insurance claim. That is Washington's rule, and deadlines of this kind vary by state, but the general lesson applies everywhere: report the crash to police promptly, because a missing police report can undermine an otherwise valid claim.

The bottom line

Underinsured motorist coverage is the difference between absorbing the shortfall yourself and having somewhere to send the rest of the bill. It is optional in most states, must generally be offered to you, and is the kind of coverage whose value only becomes obvious on the day you need it. Check your declarations page now rather than after a crash. If you already have a claim, notify your own insurer early and do not settle with the other driver's insurer before confirming what your policy requires.