Comparative Fault in Illinois: Can You Still Recover If You Were Partially at Fault?

The most common question after a car accident: can I recover if I was partly to blame? Maybe you were going a few miles over the speed limit when the other driver ran a red light. Maybe you were distracted for a moment before the collision. The other driver’s insurer will almost certainly raise these facts — and plenty of people assume that any fault on their side kills the claim entirely.

In Illinois, that’s not how it works.

Illinois uses modified comparative fault

Under 735 ILCS 5/2-1116, Illinois follows a modified comparative negligence system. The rule: you can recover damages as long as your share of fault does not exceed 50%. If you are 50% or less at fault, your recovery is reduced by your percentage of responsibility. If you are 51% or more at fault, you recover nothing.

This is sometimes called the “51% bar” — and it changed relatively recently. Before August 2023, Illinois used a “greater than 50%” threshold, meaning a plaintiff who was exactly 50% at fault could still recover. The current rule is stricter: at 51% or above, you’re barred.

Here’s what that looks like with real numbers. Say you’re in a crash with $100,000 in damages. A jury determines you were 30% at fault for following too closely, and the other driver was 70% at fault for making an unsafe lane change. Your recovery would be reduced by 30% — so you’d receive $70,000 instead of $100,000. If those numbers were reversed — you at 70% and the other driver at 30% — you’d recover nothing.

How fault is actually determined

Fault allocation isn’t mechanical. It’s judgment — made by a jury at trial or negotiated during settlement. The Illinois Pattern Jury Instructions (IPI 21.01 and B21.02) guide juries in assigning percentages of fault based on the evidence presented.

Factors that commonly influence fault allocation include traffic violations (running a red light, speeding, failure to yield), distracted driving, impairment, failure to maintain a proper lookout, and whether either driver took evasive action. Physical evidence matters: vehicle damage patterns, skid marks, surveillance footage, and witness statements all play into how fault gets divided.

Insurance adjusters make their own fault assessments using similar evidence. Their evaluation directly affects settlement offers. If an adjuster assigns you 25% comparative fault, they’ll typically reduce their offer by that amount — and you need to understand that framework to evaluate whether their number is reasonable or inflated.

Common scenarios where comparative fault comes up

Comparative fault isn’t limited to cases where both drivers clearly did something wrong. It often comes up in situations that feel less obvious:

Intersection collisions. One driver runs a stop sign, but the other was exceeding the speed limit. Both contributed to the severity of the crash, even if only one caused the initial collision.

Rear-end accidents. Illinois recognizes a rebuttable presumption that the rear driver is at fault. But if the lead driver stopped abruptly without warning or was driving with non-functioning brake lights, some fault may shift forward.

Seatbelt non-use. Illinois law (625 ILCS 5/12-603.1) requires seatbelt use. While the failure to wear a seatbelt doesn’t cause the accident, it may be relevant to the severity of injuries — and the defense will argue it should reduce damages.

Pedestrian and bicycle cases. A pedestrian jaywalking or a cyclist riding against traffic may bear some fault even when a driver acted negligently. The question is always about proportional responsibility.

Why comparative fault matters for your settlement

The practical impact: if the insurer argues you were partially at fault, it reduces what they pay. They will make this argument whenever facts support it. Adjusters are trained to identify comparative fault angles early in the claims process and factor them into reserve-setting and valuation.

Ignoring comparative fault arguments doesn’t kill them. It weakens your credibility. The stronger move — how we handle cases at our Peoria car accident practice — is to acknowledge the argument, address it with evidence, and frame the fault allocation accurately rather than pretending it doesn’t exist.

Frequently Asked Questions

If I was partially at fault for a car accident in Illinois, can I still file a claim?

Yes, as long as your share of fault is 50% or less. Under Illinois’s modified comparative fault system (735 ILCS 5/2-1116), your recovery is reduced by your percentage of fault but not eliminated. At 51% or above, you’re barred from recovering.

Who decides how much fault I have?

If the case goes to trial, a jury assigns fault percentages guided by the Illinois Pattern Jury Instructions. In settlement negotiations, the insurer’s adjuster makes their own assessment based on the available evidence. Your attorney can challenge that assessment with documentation, expert analysis, and legal argument.

Does a traffic ticket after an accident prove I was at fault?

Not automatically. A traffic citation is evidence that may be considered, but it doesn’t conclusively establish fault for purposes of a civil claim. The circumstances of the accident — including what both drivers did — determine fault allocation. A citation for speeding, for example, doesn’t mean you caused the accident if the other driver ran a red light.

If you’ve been in an accident and the other side is blaming you — or if you’re not sure how fault might be divided — the Peoria personal injury lawyers at Parker & Parker can review the facts and give you an honest assessment. It’s a free conversation.

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Comparative Fault in Illinois: Can You Recover If Partially at Fault?