The person who decides who caused your crash never saw it happen. Even worse, they get paid by the other side.
That’s the reality of assigning fault in a car accident. The person weighing blame, initially, is not a judge, not even the officer who wrote the report, but an insurance adjuster incentivized to pay out as little as possible. Understanding how these insurance companies determine fault matters in Illinois more than in most places.
Why? The percentage they pin on you controls every dollar you can recover.
One careless sentence on a phone call can move that number the wrong way. A car accident lawyer in Marion can keep their math honest.
Here’s how the adjuster investigates a crash and what the “51-percent rule” means for your money. We’ll also touch on why the police report isn’t the final word, and other tricks to watch for along the way.
The Role of the Insurance Claims Adjuster in Determining Fault
The adjuster is more or less an investigator whose client already has a rooting interest. The insurance adjuster investigation process starts within days of the crash, and it’s real detective work: reading documents, interviewing the drivers, studying dents.
The evidence for car accident liability usually includes:
- The police report and any citations issued at the scene
- Statements from both drivers, which is where people get in trouble
- Photos, dash cam footage, and nearby security video
- Witness accounts, ideally from strangers with no stake in the outcome
- Vehicle damage patterns, since a crushed rear bumper tells its own story about who hit whom
- Black box data from newer cars, showing objective speed and braking numbers in the seconds before impact
At the end, the adjuster assigns each driver a percentage of the blame. It’s important to think of that percentage number not as a neutral finding but more as an opening position. After all, it’s been calculated by someone whose employer profits when more of the blame lands on you.
How Illinois Modified Comparative Negligence Laws Impact Your Claim
Illinois runs on a system of modified comparative negligence, and the math is brutally simple. If you are 50 percent or less at fault, you can recover damages, minus your share of the blame.
But once your share of blame crosses 51 percent, you get nothing.
So, let’s do the math with some examples. If you sustain $100,000 in damages and the insurance adjuster deems you 20 percent at fault, your recovery is cut to $80,000.
At 40 percent fault, your recovery is cut to $60,000. But at 51 percent? Your recovery is zero. That’s why insurance adjusters will fight tooth and nail to increase your percentage of fault. Each percentage point they can pin on you translates to a full grand on a claim of $100,000.
If they can push you just one point past 50 percent, your whole claim disappears.
This is actually a minor improvement on Illinois’ previous system. The old contributory negligence rule barred recovery for any fault at all. Today’s version is friendlier, but the incentive to inflate your share never went away.
Why the Police Report Is Not the Final Word on Fault
The officer who worked on your crash showed up after it happened. They spent maybe an hour at the scene and wrote up their informed opinion. Is this useful? Absolutely.
Is it binding? No.
The police report vs insurance fault question trips people up in both directions. Insurers can reject a report that favors you, but they can also argue against a report that doesn’t.
A traffic ticket works the same way. It’s strong evidence of negligence, but not an automatic verdict on civil liability. A lawyer can often show that the violation had little to do with why the collision occurred. When the report is wrong or thinly supported, attorneys push back with their own investigation.
Sometimes they even bring in an accident reconstruction expert who can rebuild the crash from skid marks, crush depth, and black box data.
Common Insurance Company Tactics to Shift Blame to You
The charming, sympathetic adjuster calling to “get your side of things” is running a play. One of their standard tactics is to request a recorded statement from you as early as possible, while you’re still rattled and medicated. The adjuster can then mine your statement for admissions of fault.
An apology, even just to be polite, or saying “I never saw the other car,” or even a shrugging guess about your own speed, can boomerang back months later with a higher percentage of fault dropped on you.
You’ve got to be careful with the paperwork, too. A blanket medical records authorization looks routine, but it allows the insurance company to dig through decades of your medical history. They’re looking for any pre-existing condition to blame you for your injuries.
Beware also the fast settlement offer, the one that arrives before you’ve finished physical therapy. That fast, lowball offer is betting you don’t yet know what your claim is really worth.
Remember: You are not required to give a recorded statement to the other driver’s insurance company, nor should you sign anything until your lawyer has read it.
Their Math Isn’t Your Verdict
An adjuster you’ll never meet has put a number on your crash. Everything about the process that produced that number favored the company paying the bill. It’s probably less than fair to you.
Prince Law Firm has spent years contesting those numbers for injured people across southern Illinois. We build the independent evidence that moves fault percentages back where they belong. When the insurer won’t budge, we haul the case into a Marion courtroom.
If the insurance company is calling you about the problem, speak with an attorney before you accept their version. Their math protects their money.
Yours should protect you.
