Illinois gives you 2 years from the date of injury to file a personal injury lawsuit, under 735 ILCS 5/13-202. The rule is straightforward for most claims, but the state's fault system is where most disputes actually happen.
The Standard 2-Year Deadline
Most negligence-based personal injury claims in Illinois — car accidents, slip and falls, dog bites, product liability — fall under this standard two-year window, measured from the date of the injury. As in most states, missing the deadline generally results in dismissal of the claim regardless of its underlying merit.
Modified Comparative Fault: The 51% Bar
Illinois uses modified comparative fault with a 51% bar. If you're found 50% or less at fault for your own injury, you can recover damages reduced by your fault percentage; at 51% or more, you recover nothing. Because Illinois is a true at-fault (tort) state rather than a no-fault state, there's no separate injury-severity threshold to clear before suing for pain and suffering — the fault determination is typically the central issue.
💡 Because there's no no-fault threshold standing between you and a lawsuit in Illinois, disputes here tend to center on the fault percentage and the value of your damages — making documentation of both liability and injury impact especially important.
Why the Deadline and the Fault Rule Both Matter
Even a claim filed well within the two-year deadline can be reduced or eliminated by an unfavorable fault determination. Building your case — evidence, witness statements, medical documentation — as early as possible protects you on both fronts.
Frequently Asked Questions
How long do I have to file a personal injury lawsuit in Illinois?
Generally 2 years from the date of injury under 735 ILCS 5/13-202.
What is Illinois's comparative fault rule?
Modified comparative fault with a 51% bar — you recover reduced damages at 50% fault or less, and nothing at 51% or more.
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