A car crash leaves you with immediate problems and many questions. One thing that you might overlook is how long you have to file your case. Between gathering evidence and other important documents, being aware of how much time you have can help prepare to seek compensation.
How does the deadline work?
Illinois generally gives you two years from the crash date to file a personal injury lawsuit against the responsible driver. The same period applies whether you were driving, riding as a passenger, cycling or walking when the vehicle struck you. If the crash occurred on Aug. 10, 2024, for example, you would ordinarily need to submit your case by Aug. 10, 2026.
If you miss this window, the other driver may ask the court to dismiss your case. Unless the court accepts a legal exception, the judge may grant that request even when the driver admitted fault or your evidence strongly supports your account.
Does an insurance claim count?
Most people report a crash to an insurance company long before they consider a lawsuit, and working with an adjuster may feel like formal legal action. Illinois treats an insurance claim and a lawsuit as separate matters, so opening a case does not preserve your right to sue.
The two-year period continues while the adjuster reviews your medical records, requests statements and makes offers, even when both sides negotiate in good faith. Those discussions can last for months without producing a settlement, and neither a letter, phone call nor offer changes the filing date unless the parties sign a valid tolling agreement.
Could another deadline apply?
Illinois generally pauses the two-year period if you were younger than 18 when the crash injured you, giving you two years after your 18th birthday to file. A parent or guardian might bring the case on your behalf earlier, which may make it easier to preserve footage, witness accounts and other evidence.
The state recognizes a discovery rule that may postpone the deadline until you know or reasonably should know that you were injured and that the injury was wrongfully caused. However, courts generally treat a car crash as a sudden traumatic event, so the filing deadline usually begins on the injury date even if the full extent of the injury is diagnosed later.
Different rules apply when a government employee or vehicle causes a collision. The state generally gives you one year to sue a local public entity or employee, while a claim involving a state vehicle usually belongs in the Illinois Court of Claims, which can require written notice within one year and filing within two years.