Dismissal, almost without exception
If a personal injury lawsuit is filed in Missouri after the applicable statute of limitations has run — the general five-year deadline under RSMo § 516.120, or the shorter two-year rule for medical malpractice — the court will almost always dismiss the case as time-barred. This happens regardless of how strong the underlying claim actually is or how serious the injury turned out to be.
Courts apply these deadlines strictly
Statutes of limitations exist specifically to create a firm, predictable cutoff, and Missouri courts generally enforce them that way. Being close to the deadline, or having a sympathetic reason for the delay that doesn't fit a recognized legal exception, isn't on its own a basis for a court to excuse a late filing.
A deadline genuinely worth watching
Missouri's five-year general deadline is among the longest in the country — but it has been the target of repeated legislative efforts to cut it down to two years, with a bill in the 2026 session continuing that push. None of these efforts has become law as of today, so the five-year deadline still governs current injuries, but anyone relying on the longer window should stay aware that lawmakers keep trying to shorten it going forward.
A distinctive risk for claims involving minors
Because Missouri's tolling rule for minors points to a different age depending on whether a claim is an ordinary injury claim (age 21) or a medical malpractice claim (age 18, or even age 12 for very young children), assuming the wrong tolling rule applies is a genuine way to miscalculate a deadline by years. See our guide to Missouri's age-21-versus-age-18 tolling split for exactly how this works.
Negotiations end along with the legal leverage behind them
One of the more painful practical consequences: once the statute of limitations has actually run, an insurance company has no legal obligation to keep negotiating, to make any offer, or to pay anything at all — even if settlement talks were active and seemingly productive right up until the deadline passed.
If there's any doubt at all
Because the consequence of missing a deadline is generally permanent, and because Missouri's rules genuinely differ depending on the type of claim involved, the only reliable way to know where things actually stand is to confirm the exact date with a licensed Missouri attorney as early as possible.