Key Takeaways
- The bar is more than 50%. At exactly 50% you still recover half your damages.
- One percentage point is the whole case. The step from 50% to 51% takes a recovery to nothing.
- Below the bar, fault is a discount, not a defense. 30% at fault means 70% of your damages.
- Nobody is “assigned” a percentage early. An adjuster’s number is a negotiating position, not a finding.
- This is why small admissions matter. The fight is usually over a few points either side of the line.
What the rule actually says
Illinois uses modified comparative negligence. The rule lives in 735 ILCS 5/2-1116, and it does two separate things.
First, it reduces your damages in proportion to your share of the fault. Second, it bars recovery entirely if your share is more than 50% of the total proximate cause of the injury.
The wording matters more than almost anything else in an Illinois car accident claim. The bar is not “50% or more.” It is “more than 50%.” That single word decides whether a plaintiff who is found exactly half responsible walks away with half their damages or with nothing at all.
The arithmetic, worked
Assume damages of $200,000 proved at trial. Your share of the fault changes the outcome like this:
| Your share of fault | What you recover | Why |
|---|---|---|
| 0% | $200,000 | No reduction |
| 20% | $160,000 | Reduced by your share |
| 40% | $120,000 | Reduced by your share |
| 50% | $100,000 | Still recovers. 50% is not “more than 50%” |
| 51% | $0 | Barred entirely |
Read the last two rows together. A single percentage point is worth $100,000 in this example, and it is worth the entire case in every example. Nowhere else in an injury claim does so much turn on so small a movement.
Below the bar, fault is a discount
People often assume that any fault of their own ends the claim. It does not. Below the bar, your own share operates as a reduction and nothing more.
This is worth saying plainly because it changes behavior. Someone who believes they were partly to blame frequently never calls a lawyer at all, and a claim worth six figures after reduction is simply abandoned. Being 30% responsible for a crash does not make a claim worthless. It makes it worth 70%.
Where the percentage comes from
No one hands out percentages at the scene. A police officer does not assign them. An adjuster’s early figure is an opening position in a negotiation, not a determination of anything.
In a case that is tried, the jury apportions fault after hearing the evidence. In the far more common case that settles, the percentage is whatever the parties agree it is, which is why the evidence gathered in the first weeks shapes the number long before anyone argues about it. We set out how that happens in detail in how fault is decided in an Illinois car accident.
Why the defense aims for 51%
Because of where the bar sits, an insurer defending a claim has an unusually powerful target. It does not need to show you were mostly to blame in any ordinary sense. It needs one point over half.
That shapes the tactics you are likely to meet:
- Recorded statements that invite a small concession, such as agreeing you were “going a bit fast” or “might have looked away.”
- Seat belt arguments, which have limits. Under 625 ILCS 5/12-603.1(c), failure to wear a seat belt is not evidence of negligence and cannot be used to reduce recovery.
- Multiple small allegations stacked together, each individually minor, which together aim to cross the line.
None of this requires bad faith on the insurer’s part. It is simply where the statute puts the decisive threshold, and a defense lawyer would be doing their job badly if they aimed anywhere else.
More than one defendant
Where several drivers are at fault, apportionment does more than set your reduction. It also determines which defendants can be pursued for the whole judgment under 735 ILCS 5/2-1117, which we cover in multi-vehicle crash claims. Your own share is still measured against the total, not against any one defendant.
The deadline still applies
Being under the bar is no use if the claim is out of time. Personal injury claims run two years under 735 ILCS 5/13-202, and only one year against a local public entity or its employee under 745 ILCS 10/8-101(a). See the Illinois car accident filing deadlines.
Frequently Asked Questions
Can I recover if I was 50% at fault in Illinois?
Yes. Under 735 ILCS 5/2-1116 recovery is barred only where your share is more than 50%. At exactly 50% you recover half your damages. On $200,000 of proved damages that is $100,000.
What happens at 51% fault?
You recover nothing. The step from 50% to 51% is the difference between half your damages and none of them, which is why a single percentage point is often the most contested issue in an Illinois car accident case.
Is it worth claiming if the crash was partly my fault?
Usually yes. Below the bar, your share reduces your damages rather than defeating the claim. Someone 30% at fault still recovers 70%. Claims are frequently abandoned by people who assume any fault of their own ends the matter, and that assumption is wrong.
Who decides my percentage of fault?
A jury apportions fault in a case that is tried. In a case that settles, which is most of them, the percentage is what the parties agree. A police officer does not assign percentages, and an insurance adjuster’s early figure is a negotiating position rather than a finding.
Can not wearing a seat belt be used against me?
Not as evidence of negligence. Under 625 ILCS 5/12-603.1(c), failure to wear a seat belt is not evidence of negligence and may not be used to reduce recovery in a civil action.
Does the 51% rule apply if several drivers were at fault?
Yes, and your share is measured against the total fault rather than against any single defendant. Apportionment among defendants is governed separately by 735 ILCS 5/2-1117, which decides which of them can be pursued for the whole judgment.
Talk to an Elmwood Park car accident lawyer
Because the bar sits one point above half, an Illinois car accident case is often won or lost over a very small movement in the fault percentage. That movement is driven by evidence gathered early: scene photographs, vehicle damage, independent witnesses and, increasingly, footage.
If you were hurt in a crash in Elmwood Park, Oak Lawn, Skokie, Niles, Orland Park or anywhere in Cook County, Lawyer Furqan will take the fault argument seriously from the first week rather than waiting for the insurer to set the number.
Call 847-800-8978 or contact us online. The consultation is free, there is nothing upfront, and you owe no attorney’s fee unless we win.
Sources and authorities cited
- 735 ILCS 5/2-1116 · damages reduced by the plaintiff’s share, barred above 50%
- 735 ILCS 5/2-1117 · apportionment among multiple defendants
- 625 ILCS 5/12-603.1(c) · seat belt use is not evidence of negligence
- 735 ILCS 5/13-202 · two-year period; 745 ILCS 10/8-101(a) · one year against a local public entity
This article is general legal information about Illinois law, not legal advice, and creates no attorney-client relationship. How fault is apportioned depends on the evidence in each case, and nothing here predicts a result.
