Illinois UM/UIM Claims: 7 Things to Know

Last Updated: June 11, 2026

If you were hit by an uninsured or underinsured driver in Illinois, your own auto policy may pay you through uninsured motorist (UM) and underinsured motorist (UIM) coverage. Illinois law requires every auto policy to include UM coverage and offer UIM coverage at the same limits. Notice deadlines can be as short as 10 business days.

You did everything right. You carried insurance, drove carefully, kept your eyes on the road, and then someone slammed into you who either had no insurance at all or had the bare minimum of coverage that doesn’t begin to cover what you’re going through. Now what?

The short version: in Illinois, your own car insurance is built to step into the at-fault driver’s shoes when that driver can’t pay. That’s what uninsured motorist (UM) and underinsured motorist (UIM) coverage is for. But how those claims work, what triggers them, what deadlines apply, what the insurance company has to offer you, and where adjusters try to trip people up, is a different story for every case. This guide walks you through what we have seen in central-Illinois UM/UIM claims and what you need to know before you sign anything.

What is uninsured motorist (UM) coverage under Illinois law?

Uninsured motorist coverage is the part of your own auto policy that pays you when the at-fault driver has no liability insurance. It is fault-based, meaning you still have to prove the other driver caused the crash and caused your injuries. But instead of collecting from that driver’s insurance company (because there isn’t one), you collect from your own.

Uninsured motorist coverage is bodily-injury protection that turns on the negligence of the uninsured driver. In practical terms, that means your UM claim is essentially the same case you would have brought against the at-fault driver, same proof of fault, same proof of injury, same proof of damages, just filed against your own carrier.

UM coverage in Illinois typically pays for:

Medical bills from the crash
Lost wages and lost earning capacity
Pain and suffering
Loss of a normal life
Future medical care related to crash injuries

If the other driver was uninsured, meaning the policy lapsed, the car was never insured, or the driver was never on a policy at all, UM is the first place to look.

How is underinsured motorist (UIM) coverage different from UM?

Underinsured motorist coverage fills the gap when the at-fault driver has some insurance, just not enough. In Illinois, the minimum bodily-injury liability limits a driver is allowed to carry are $25,000 per person and $50,000 per accident. If your medical bills alone blow past $25,000, and serious crash injuries often do, that minimum policy will not cover what you’ve actually lost.

UIM coverage is designed for that gap. Here’s how it works in plain English:

The at-fault driver’s insurer pays out their policy limits (say, $25,000).
You then look at your UIM limits (say, $100,000).
Your UIM coverage pays the difference, up to your limit, minus what the at-fault driver already paid.

So a $100,000 UIM policy with a $25,000 setoff (a reduction for what the at-fault driver paid) gives you up to $75,000 more on top of the at-fault driver’s limits. UIM is not extra free money, it stacks on top of what the at-fault driver’s insurance pays, up to your own UIM limits.

One thing many drivers do not realize: UM and UIM are usually separate but related coverages on the same policy, and Illinois requires the insurance company to offer UIM at the same limits as your liability coverage. Many people accept the offer without understanding it, then forget they have it.

What does 625 ILCS 5/143a require every Illinois auto policy to include?

Illinois has put the UM/UIM rules directly into the Vehicle Code. The key statute is 625 ILCS 5/143a, which sets the floor for what every Illinois auto policy must contain.

Here’s what the statute does in plain terms:

Mandatory UM coverage. Every auto liability policy sold in Illinois has to include uninsured motorist bodily-injury coverage at no less than the state minimum limits, currently $25,000 per person and $50,000 per accident.
Mandatory UIM offer. Insurers must offer underinsured motorist coverage at the same limits as your liability coverage. You can decline it in writing, but they cannot quietly leave it off the policy.
Hit-and-run protection. UM coverage in Illinois applies to a driver who hit you and fled, subject to the physical-contact rule explained below.
Anti-stacking limits. The statute also controls how multiple UM/UIM policies interact when more than one is available.

The reason the statute matters: when the insurance company tells you a particular coverage “doesn’t apply” or “isn’t available,” the first place to look is the language of 5/143a, not the marketing brochure your agent gave you. Adjusters sometimes interpret coverage more narrowly than the statute actually permits.

What deadlines apply, and why is the 10-business-day notice rule a trap?

UM/UIM claims have an internal deadline that is much shorter than the lawsuit deadline. Illinois personal-injury cases generally have a two-year statute of limitations, but many auto policies impose a separate notice requirement of just 10 business days for hit-and-run or uninsured motorist claims involving an unidentified vehicle.

Per claim-handling practice (chapters 16–19), this 10-business-day reporting deadline is one of the most common ways UM/UIM claims get denied. The pattern goes like this:

A driver is hit by an unknown vehicle that flees the scene.
They go to the ER, focus on their injuries, talk to family, maybe wait a week or two to figure out what happened.
By the time they call their own carrier, the 10-business-day clock has run.
The insurer denies the UM claim on late-notice grounds, even though the driver never knew the clock was running.

This deadline is often buried in policy language most people never read. The two takeaways:

Report any hit-and-run or unidentified-vehicle crash to your own insurer immediately, same day if you can, definitely within 10 business days. File a police report the same day.
Do not assume the two-year lawsuit clock is the only deadline. Your policy’s internal notice provisions can cut your claim off long before the statute of limitations does.

For a fuller walk-through of how the major deadlines interact, see our guide to hit-and-run accidents in Illinois.

Does UM cover hit-and-run accidents in Illinois? (The physical-contact rule)

Yes, but Illinois imposes a physical-contact requirement when the at-fault vehicle is unidentified. If a driver fled and you cannot identify them, your UM claim usually requires proof that the unidentified vehicle physically struck your vehicle (or another vehicle that struck yours in a chain).

The reason for the rule is straightforward: without it, anyone who lost control on a curve could claim a “phantom vehicle” cut them off, and insurers would have no way to test the story. The physical-contact requirement gives the carrier a physical-evidence anchor for the claim.

What this means in practice (drawn from claim-handling practice, chs. 16–19):

Paint transfer, dents, scrape patterns, and debris matching the other vehicle can all establish contact.
A witness who saw the contact can substitute for physical evidence in some cases, but it is the harder road.
A “swerve to avoid” with no contact at all is the classic disputed scenario. Insurers routinely deny these.

If you were forced off the road by a vehicle that never touched yours, do not assume your UM claim is dead, but understand you have an uphill fight, and document everything you can about the other vehicle.

What if the uninsured driver wasn’t in the car when I was hurt? (The Aryaine Jad rule)

UM coverage in Illinois can reach further than the moment of impact. The Illinois Appellate Court addressed this directly in Aryaine Jad v. Economy Fire & Casualty Co. (Ill. App. 1996), where the court extended UM coverage to a swerve-to-avoid scenario involving a pedestrian, who was the uninsured driver of a disabled vehicle abandoned on the Interstate.

The facts mattered: the uninsured driver had pulled over, gotten out, and was crossing or standing on the roadway when the insured driver swerved to avoid hitting him and was injured. The carrier argued there was no “use of a vehicle” because the uninsured driver was no longer in his car. The court disagreed, abandoning a disabled, uninsured vehicle on an Interstate is a “reasonable and foreseeable consequence of vehicle use,” and the UM coverage applied.

The Aryaine Jad takeaway: do not let an adjuster talk you out of a UM claim with a too-narrow reading of “arising out of the use of a motor vehicle.” Illinois courts have read that phrase to include foreseeable consequences of how an uninsured driver used (or stopped using) their vehicle. If your situation involves an abandoned car, a disabled vehicle, or another fact pattern outside a textbook collision, get the case-law analysis done before you accept a denial.

How much can I recover for property damage without collision coverage?

Illinois UM property-damage protection is capped, and the cap is low. If your auto policy does not include collision coverage, the UM property-damage limit you can recover from your own carrier for damage caused by an uninsured driver is capped at $3,500 (per claim-handling practice, chs. 16–19).

That cap surprises a lot of people. If an uninsured driver totals your $20,000 vehicle and you don’t carry collision, your own policy pays just $3,500 of the property damage. The rest is theoretically recoverable from the uninsured driver personally, but that is the entire reason this problem exists. If the driver couldn’t afford insurance, they almost never have the assets to pay a property-damage judgment.

Two practical points:

Collision coverage is the real fix. If you carry collision, your own carrier pays the full repair or fair-market value of the vehicle (minus the deductible), then chases the at-fault driver themselves through subrogation, that is, the insurer’s right to step into your shoes and try to recover what it paid.
Deductible-recovery is a separate mechanism. When your collision coverage pays out, the insurer may recover its money and your deductible from the at-fault driver. That deductible-recovery money is supposed to come back to you, but it does not always happen automatically. Ask.

Property damage is usually the easier part of a UM claim to resolve. The hard part is the bodily-injury piece, which is where adjusters earn their reputation.

How do I stack UM/UIM coverage across multiple policies or vehicles?

Stacking, combining multiple UM/UIM coverages to cover a single loss, is partly available in Illinois and partly restricted. Whether you can stack depends on the language of your policy or policies and the specific anti-stacking provisions in 625 ILCS 5/143a.

The general framework looks like this:

Intra-policy stacking (multiple cars on the same policy): often limited or barred outright by anti-stacking language. The insurer will usually try to apply the single highest limit, not the sum.
Inter-policy stacking (separate policies, yours plus, say, a household resident’s): sometimes available, particularly for an injured passenger who can look to the host driver’s UM and to a resident-relative policy.
Excess vs. primary disputes: when more than one policy covers the same injured person, the insurers fight among themselves about which policy is primary and which is excess. The injured person should not get caught in that fight, but often does.

The bottom line: do not assume the limits on the policy in front of you are the only limits available. Pull every household auto policy, every commercial auto policy if any vehicle involved was owned by an employer, and any umbrella policy. Coverage stacking analysis is the single biggest under-the-hood factor that changes a UM/UIM claim’s value.

Should I accept the insurer’s first UM offer?

Almost never. First offers on UM and UIM claims are routinely below the case’s actual settlement value, and adjusters know it. claim-handling practice (chs. 12–14) describes the adjuster’s negotiation posture on UM claims this way: the carrier is not just defending, it is, in effect, both your insurer and your adversary. That creates a built-in conflict the adjuster manages by anchoring low and waiting to see whether you push back.

Patterns we have seen on UM/UIM claims in central Illinois:

Initial offers anchored to the medical-bill total only, with no real value attached to pain, suffering, or loss of a normal life.
Disputes over whether all the medical treatment was “necessary”, particularly chiropractic care, pain management, or extended physical therapy.
Aggressive use of recorded statements early on, before the injured person has all their records or even knows what their injuries are.
Soft requests for medical authorizations that are broader than the law requires, fishing trips for pre-existing conditions.

If you have not yet given a recorded statement, do not give one without talking to a lawyer first. If you have, that is not the end of the world, but it changes how the case is built.

One more thing worth knowing: in a UM claim, your contract with your own insurer obligates you to cooperate. There is a difference between cooperating (giving information the contract requires) and volunteering (giving statements that can be used to reduce your claim). A Peoria attorney who has handled UM cases against the carrier on the other end of the phone knows the line.

When should I call a Peoria UM/UIM lawyer?

Call before you give a recorded statement, before you sign any release, and as soon as you know the at-fault driver is uninsured or underinsured. The early decisions on a UM/UIM case, notice timing, recorded statements, medical authorizations, demand structure, drive the outcome more than the closing negotiation does.

Specific situations where calling early matters most:

The crash was a hit-and-run, and you have not yet reported it to your own carrier.
The at-fault driver has $25,000 / $50,000 minimum limits and your medical bills are heading anywhere near $25,000.
You’re not sure what UM or UIM limits you carry.
The at-fault driver was uninsured and your own adjuster is asking for a recorded statement.
You were a passenger in someone else’s vehicle and don’t know whose UM/UIM applies.
The carrier has denied the claim on a coverage technicality, physical contact, “arising out of,” late notice, or anti-stacking.

Parker & Parker handles UM and UIM claims throughout the Tenth Judicial Circuit, Peoria County, Tazewell County, and the surrounding central-Illinois counties, and works with clients first treated at OSF Saint Francis, UnityPoint Methodist, and the regional trauma centers along the I-74 corridor.

If you’d rather talk it through before deciding, that’s what the free consultation is for. Robert Parker leads the firm’s personal-injury practice, with Parker & Parker handling accepted cases as a firm.

Hit by an Uninsured or Underinsured Driver? Let’s Talk.

Robert Parker has handled UM/UIM claims across central Illinois. The consultation is free and there is no fee unless we recover for you. Call (309) 673-0069 or schedule a free consultation today.

For broader context on how a Peoria personal-injury case is built from first call through verdict or settlement, our central-Illinois personal-injury team can walk you through the whole arc.

Frequently Asked Questions

Does my UM coverage pay me if I was hit by a driver who let their policy lapse the day before?

Yes. UM coverage applies whenever the at-fault driver has no liability insurance in effect at the time of the crash, whether the policy lapsed, was canceled, was never bought, or simply did not cover that driver. The reason the driver is uninsured does not change your right to file a UM claim against your own policy.

Can the insurance company raise my rates if I file a UM or UIM claim?

An Illinois insurer is not supposed to raise your rates on a not-at-fault claim, including a UM or UIM claim where the other driver was responsible. If you see a rate change after a UM/UIM payout, ask in writing what the rating reason is. Talk to a lawyer if the answer is vague or shifts.

What if the at-fault driver had insurance, but the policy is denying coverage?

A driver whose own carrier is denying coverage, for example, because the driver was excluded from the policy, was driving without permission, or violated a policy condition, may be treated as uninsured for UM purposes. Coverage disputes between the at-fault driver and their insurer are common, and your UM coverage can sometimes step in while that dispute plays out.

I was a passenger in a friend’s car when an uninsured driver hit us. Whose UM coverage applies?

Usually the host vehicle’s UM coverage is primary for an injured passenger. If that coverage is not enough to cover your injuries, you may also be able to reach UM coverage on a policy where you are a named insured or a resident relative. This is the classic stacking scenario, and the analysis is policy-specific. Pull every household auto policy before you settle.

How long do I have to file a UM or UIM lawsuit in Illinois?

Lawsuit deadlines on UM and UIM claims can be controlled by the policy as well as by Illinois statute, and the policy deadlines are sometimes shorter than the general two-year personal-injury statute of limitations. Some policies also require arbitration rather than a courtroom trial. Read the UM/UIM section of your declarations and policy, or have a lawyer read it, before assuming you have two years.

If the at-fault driver paid the $25,000 minimum policy, does that mean I cannot collect anything from my UIM?

No. That is exactly the situation UIM coverage was built for. If your injuries and damages exceed $25,000 and your UIM limits are higher, UIM picks up the difference (your UIM limits minus the at-fault driver’s payment). Many drivers settle for the at-fault $25,000 without ever opening their own UIM claim, and that is money left on the table.

Does Illinois UM coverage pay for pain and suffering, or only medical bills?

UM coverage in Illinois is bodily-injury coverage and pays the same categories of damages a jury would award against the uninsured driver in a lawsuit, medical bills, lost wages, pain and suffering, loss of a normal life, and future medical care, up to your policy limits.

Uninsured Motorist Claims in Illinois: 7 Things to Know (2026)