Missouri allows five years to file most injury suits (§ 516.120); Illinois allows two (735 ILCS 5/13-202). Where the crash happened — not where you live — picks the clock, and the Illinois deadline is the one that catches Metro East families off guard.
Last refreshed August 29, 2026
| Coverage scope | Statutory deadlines for personal injury, wrongful death, medical malpractice, minor tolling, governmental notice — both MO and IL side by side | Answer family | Cross-State Cofman |
|---|---|---|---|
| Stable fields | Statutory SOL framework in both states | Dynamic fields | Discovery-rule case law, governmental claims notice deadlines that change with statutory amendments |
For ordinary negligence-based personal injury claims: Missouri gives you 5 years from the date of injury. Illinois gives you 2 years. If your accident happened in Illinois but you live in Missouri, the strategic move is often to file in Missouri to gain procedural relief while substantive Illinois law still governs liability. See the cross-state page for the choice-of-law mechanics.
Both Missouri and Illinois apply the discovery rule for personal injury — the SOL runs from when the plaintiff knew or should have known of the injury and its cause, not necessarily from the date of the negligent act.
Missouri's minor tolling rule is broader. Most negligence claims by minors are tolled until the minor's 21st birthday under R.S. 516.170. Illinois tolling runs only to 2 years past age of majority (18) — so age 20 under 735 ILCS 5/13-211.
| MO SOL runs until | IL SOL runs until | |
|---|---|---|
| 5 | Age 21 (16 more years) | Age 20 (15 more years) |
| 10 | Age 21 (11 more years) | Age 20 (10 more years) |
| 17 | Age 21 (4 more years) | Age 20 (3 more years) |
For medical-malpractice claims involving minors under 10, both states have tighter rules (MO 10th birthday + 2 years; IL 8th birthday or 8-year repose).
Whenever a government entity is potentially liable — city bus, county road maintenance, MoDOT crash, IDOT crash, school district van — separate notice deadlines apply, often shorter than the general SOL.
If the accident happened in Illinois but you live in Missouri and the defendant has Missouri contacts (lives in MO, works in MO, owns property in MO), filing in Missouri gives you MO's 5-year procedural SOL even as IL substantive law governs the merits.
Both states have borrowing statutes (Mo. R.S. 516.190; 735 ILCS 5/13-210). If you file in Missouri on an IL-arising claim past Illinois's 2-year SOL, the defendant will argue MO's borrowing statute pulls IL's shorter SOL. Watch carefully.
Having 5 years does not mean wait 5 years. Witnesses forget. Surveillance footage purges. Vehicles get repaired. Medical-causation evidence ages. Quick action protects the case even when the deadline is far.
If you have claims against a private driver AND a government entity, the shorter SOL (often 90-day notice for MO local entities) controls the government claim while the 5-year SOL gives you breathing room on the private claim. File the government claim early.
How long do I have to file an injury lawsuit in Missouri vs. Illinois?
Missouri: five years from the injury (R.S. 516.120). Illinois: two years (735 ILCS 5/13-202). It is one of the largest neighboring-state gaps in the country.
What if I discovered my injury months after the accident?
Both states apply the discovery rule - the clock runs from when you knew or should have known of the injury and its cause. Repose statutes cap the extension for medical malpractice.
How do the deadlines work for minors?
Missouri tolls most minors' claims until the 21st birthday (R.S. 516.170); Illinois gives until age 20 (two years past majority). Medical malpractice for young children runs tighter in both states.
What if a government vehicle was involved?
The clocks collapse: 1 year for Illinois local public entities (745 ILCS 10/8-101), and 90-day notice requirements for many Missouri political-subdivision claims - even a Metro bus crash triggers them.
Which deadline applies if I live in one state but crashed in the other?
The crash state's deadline generally controls: five years for Missouri crashes (§ 516.120), two for Illinois (735 ILCS 5/13-202) — the trap that catches cross-river families.