One of the most common worries people bring to a first conversation is some version of, "I think I might have been partly at fault — do I even have a case?" In Illinois, the answer is often yes. The state's comparative-fault rule is built precisely for the messy reality that crashes and falls are rarely 100% one person's fault. This post walks through how the rule works, and why the other side's insurer cares about it so much.
The modified comparative-fault rule
Illinois follows what is called a modified comparative-fault standard (735 ILCS 5/2-1116). Two things flow from it:
- The 50% bar. You are barred from recovering only if your share of the fault is more than 50%. At 50% or less, you can still recover.
- Recovery is reduced by your share. Below that line, your award is cut by your percentage of fault. Found 20% responsible? Your recovery is reduced by 20%.
A quick illustration, using round numbers rather than any promise of value: if a claim is valued at a given amount and you are assigned 30% of the fault, you would recover 70% of it. Cross past 50%, and you recover nothing. That single line is why fault is fought over so hard.
How fault gets divided among more than two people
Real crashes aren't always two-sided. Illinois allows fault to be apportioned among everyone who contributed — multiple drivers, a property owner, sometimes the injured person. In a truck case or a multi-car pileup, that division can get complicated fast, and where the percentages land often decides the outcome. Your fault is measured against the combined fault of everyone you are seeking to recover from.
Why insurers push the fault question so early
Because every percentage point of fault an adjuster can shift onto you directly reduces what the insurer pays, they have a strong incentive to build a story in which you share the blame. That is often the real purpose of the friendly call within a day or two of the crash asking for a recorded statement — before you have advice, while you are rattled, hoping you'll say something that can later be read as an admission ("I didn't see them," "I might have been going a little fast"). You are generally not required to give the other side's insurer a recorded statement, and it is reasonable to talk to a lawyer before you do. (See why talk to a lawyer first.)
Fault is investigated and argued — not conceded
The most important thing to understand is that fault is not fixed at the scene, and it is certainly not whatever the insurer decides it is. It is established through evidence: the crash report, photographs, witness accounts, vehicle damage, and where needed, reconstruction. A driver who assumes they were "probably at fault" and accepts that framing can give away a valid claim that a proper investigation would have told a very different story about.
What this means for you
Two takeaways. First, do not assume you have no case just because you might have made a mistake too — under Illinois' rule, partial fault usually means a reduced recovery, not no recovery. Second, be cautious about accepting the insurer's version of who was to blame. If you are unsure, tell Paul what happened and he will tell you where you actually stand; the consultation is free. This post is general information about Illinois law, not legal advice about your specific case.