What To Do After a Rear-End Car Accident in Missouri or Illinois?

Getting rear-ended is stressful enough on its own. The impact, the adrenaline, the damage to your car, and then you find out the driver who hit you has no insurance, or not enough to cover what they did to you. Now what?

This happens more often than most people realize. Industry estimates put Missouri’s uninsured driver rate at roughly 13-15%, with Illinois somewhat lower. That means something close to 1 in 7 Missouri crashes could involve a driver with no coverage to pay for your injuries, your lost wages, or the pain that lingers long after the crash.

Here’s the good news, and it’s better than most people expect: if you’re a Missouri driver, you almost certainly already have coverage for this exact situation, whether you know it or not. Missouri and Illinois law both provide clear paths to compensation, and knowing how to use them changes everything.

Why Do So Many Drivers Have No Insurance?

Both states require minimum liability insurance. But requiring it and enforcing it are two different things. Policies lapse, people drive on suspended licenses, and some never buy coverage at all.

Missouri minimum requirements (25/50/25):

• $25,000 bodily injury per person
• $50,000 bodily injury per accident
• $25,000 property damage
• Plus uninsured motorist coverage of $25,000 per person / $50,000 per accident

Illinois minimum requirements (25/50/20):

• $25,000 bodily injury per person
• $50,000 bodily injury per accident
• $20,000 property damage
• Plus uninsured motorist coverage

Even drivers who do carry insurance may be underinsured. A $25,000 policy limit disappears fast when a rear-end crash causes a spinal injury, a traumatic brain injury, or requires surgery and months of physical therapy.

Your Options After Being Hit by an Uninsured Driver

1. Uninsured Motorist Coverage (UM): Your Strongest Tool

Uninsured Motorist coverage is part of your own policy. It steps in when the at-fault driver has no insurance, or flees the scene in a hit-and-run.

In Missouri, UM bodily injury coverage is mandatory. Under RSMo § 379.203, every auto liability policy issued in Missouri must include uninsured motorist coverage of at least $25,000 per person and $50,000 per accident. Unlike some states, Missouri drivers cannot opt out of this baseline protection. (A policyholder may decline UM limits above the statutory minimum, but never the minimum itself.)

That’s a genuinely important point: most Missouri drivers already have UM coverage and don’t realize it. Check your declarations page.

Missouri courts have also strengthened this protection. Anti-stacking clauses in UM policies have been invalidated as against public policy, meaning if you insure multiple vehicles, you may be able to combine UM limits for a larger recovery. Ambiguous policy language is generally construed in favor of the insured, not the insurer.

In Illinois, UM coverage is also mandatory under 215 ILCS 5/143a. Every auto policy issued in Illinois must include uninsured motorist protection.

A UM claim after a rear-end crash can cover:

• Medical expenses beyond what health insurance pays
• Lost wages during your recovery
• Pain and suffering
• Future treatment and rehabilitation
• Emotional distress and reduced quality of life

2. Underinsured Motorist Coverage (UIM)

If the at-fault driver has some insurance but not enough, Underinsured Motorist coverage may fill the gap once their limits are exhausted.

Important distinction: UIM is not required in Missouri. It’s optional coverage you must purchase separately. Many drivers assume UM and UIM are the same thing, but they are not. Pull out your declarations page and check for both.

Critical warning: You typically need written consent from your own insurer before settling with the at-fault driver’s insurance company. Settling first can void your UIM claim entirely. This single mistake has cost injured people six-figure recoveries, and it’s one of the strongest reasons to involve an attorney early.

3. A Direct Lawsuit Against the At-Fault Driver

You can sue an uninsured driver directly. But there’s a practical reality: someone who couldn’t afford insurance often has no assets or income to collect from. A judgment you can’t enforce is just paper.

An attorney can assess whether the driver has assets worth pursuing, or whether your UM claim is the faster, more reliable route.

What To Do Immediately After the Crash?

1. Call 911. An official police report is essential to both your UM claim and any lawsuit. Never skip this, even for a seemingly minor crash.

2. Document everything. Photograph vehicle damage, road conditions, skid marks, and visible injuries. Get the other driver’s name, plate number, and any insurance information. Collect witness names and numbers.

3. Don’t admit fault. Even an instinctive “I’m so sorry” can be used against you. Both states apply comparative fault rules.

4. Notify your own insurer promptly. Report the crash and confirm whether your policy includes UM and UIM. Stick to facts, and don’t speculate about injuries or fault.

5. Get medical attention right away. Adrenaline masks symptoms. Rear-end collisions are notorious for whiplash, soft tissue damage, and spinal injuries that don’t hurt for hours or days. Prompt treatment creates the medical record linking your injuries to the crash.

6. Talk to a lawyer before giving a recorded statement. You are not required to give one before speaking with an attorney. What you say can and will be used to limit your claim.

Why Your Own Insurer May Fight You?

Here’s what catches people off guard: in a UM claim, your own insurance company becomes the opposing party. Insurers minimize payouts, including to their own policyholders.

Common tactics:

• Claiming your injuries are pre-existing or unrelated
• Arguing a rear-end impact was “too minor” to cause your injuries
• Disputing medical bills or lost wage calculations
• Delaying, hoping you’ll accept a low offer out of frustration
• Demanding excessive documentation to wear you down

These are strategies, not accidents. An experienced St. Louis car accident lawyer knows how to counter each one.

What Compensation Can You Recover?

Through a UM claim, a UIM claim, or a lawsuit, the goal is the same: full compensation for what the crash cost you.

• Emergency medical care and hospital bills
• Follow-up treatment, surgery, physical therapy
• Lost wages during recovery
• Loss of future earning capacity
• Pain and suffering
• Emotional distress
• Vehicle and property damage

If your injuries are catastrophic, such as spinal cord damage, TBI, paralysis, or permanent disability, the value of your claim can be substantial. Never accept a first offer without understanding what your case is actually worth.

For more on how these claims work generally, see our guide to rear-end collision claims in St. Louis.

Frequently Asked Questions

Does Missouri require uninsured motorist coverage on every auto policy?

Yes. Under RSMo § 379.203, every auto liability policy issued in Missouri must include UM bodily injury coverage of at least $25,000 per person and $50,000 per accident. This baseline cannot be rejected. Most Missouri drivers have it without realizing it, so check your declarations page.

Is underinsured motorist (UIM) coverage also required in Missouri?

No. UIM is optional in Missouri and must be purchased separately. This is a common and costly misunderstanding.

What if the uninsured driver who rear-ended me fled the scene?

Hit-and-run crashes are generally covered by UM in both states. Missouri law recognizes UM claims even without physical contact, as long as the vehicle can be identified. Report the incident to police and notify your insurer promptly, and document any partial plate, vehicle description, or witness account.

Can I file a UM claim and sue the uninsured driver at the same time?

Often yes, but with important restrictions. Settling with the at-fault driver’s insurer without first notifying your own insurer can void your UIM coverage. These claims must be coordinated carefully.

How long do I have to file?

Missouri’s personal injury statute of limitations is five years; Illinois is two. But your insurance policy may impose much shorter notice deadlines, sometimes as little as 30 days for hit-and-run. Don’t rely on the statute of limitations alone.

What if my own insurer denies or lowballs my UM claim?

You can demand arbitration under your policy terms, file a complaint with the Missouri or Illinois Department of Insurance, or pursue a bad faith claim if the insurer acted unreasonably. Missouri’s vexatious refusal statute (§ 375.420) can add interest, attorney’s fees, and a statutory penalty when an insurer refuses payment without reasonable cause.

Award-Winning Personal Injury Lawyer Recognized for Excellence

At Mutrux Firm Injury Lawyers, our results speak through the voices of our clients and now, through the honors we’ve earned in the community. Tyson Mutrux was proudly awarded Best Attorney in Columbia for 2025 by Inside Columbia Magazine, a recognition that reflects not only legal skill but also the deep trust of those we serve in Missouri.

A lawyer’s reputation speaks volumes about their ability to handle cases effectively. Whether you need legal representation for a personal injury claim, dog bite settlement, car crash claim, slip and fall or any other legal matter, choosing an attorney with a proven track record is essential.

Reading online reviews, client testimonials, and industry recognitions can help you gauge a lawyer’s credibility. Tyson Mutrux has built a strong reputation in Missouri, earning a 10.0 Superb rating on Avvo and recognition from Expertise as one of the Best Medical Malpractice Lawyers in St. Louis (2020).

Additionally, he has been honored by The National Trial Lawyers’ “Top 40 Under 40” for his dedication to achieving the best possible outcomes for his clients. His attention to detail, strong communication skills, and history of satisfied clients are reflected in numerous positive Google reviews.

You can also connect with us directly on Google to see reviews, updates, and more:

Mutrux Firm Injury Lawyers – St. Louis

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We serve clients across Missouri and Illinois, with dedicated offices in St. Louis and Columbia.

Hit by an Uninsured Driver? We Can Help.

You did everything right. You carried insurance, followed the rules, and someone else’s irresponsibility left you hurt and facing an uncertain recovery. You shouldn’t have to fight that battle alone.

Mutrux Firm Injury Lawyers represents rear-end and uninsured motorist claimants across St. Louis, Columbia, and throughout Missouri and Illinois. We know how insurers operate, and we’ll fight your own insurance company just as hard as we fight the at-fault driver.

Free case investigation. No fees unless we win.

📞 Call (888) 550-4026 🌐 www.tysonmutrux.com 📍 Serving Missouri & Illinois