A claim does not usually die in a courtroom. It dies on a calendar, months before anyone argues about who was at fault or what a torn shoulder is worth, and the person holding the claim frequently has no idea it happened until an adjuster stops returning calls. The deadlines that matter are not one deadline. They are a stack of them, running at different speeds, some set by statute, some set by the county, and some set by the insurance policy itself. A careful reader checks all five early, writes the dates down, and works backward from the earliest.
1. The state limitation period, and which one applies to you
Every state sets a window for filing suit on a personal injury claim, and a separate one, often shorter or differently triggered, for wrongful death. The ranges vary widely between states, which means a rule a friend in another state repeats confidently may be wrong for you by a full year or more. What a careful reader checks is not just the number but the trigger: the date of the crash, the date of death, or the date of appointment of an estate representative. Confirm the figure against your own state's statute rather than a national summary, because the summaries flatten exactly the distinctions that decide cases.
2. Notice deadlines when a public entity is involved
If the other vehicle was a city bus, a county truck, a school district van, or a state trooper's cruiser, the ordinary limitation period is no longer the first deadline you face. Most states require a formal written notice of claim to the government entity within a period measured in months, sometimes as little as a few, and failure to file it can bar the claim entirely even though years remain on the statute. The notice usually has required contents: the claimant, the date, the location, the nature of the injury, and the amount demanded. Filing it with the wrong office can be treated as not filing it at all.
3. Discovery rules, and injuries that surface late
Some injuries are obvious at the scene. Others, a herniated disc that shows on imaging weeks later, a traumatic brain injury identified only after a neuropsychological evaluation, arrive after the clock has been running. Many states apply a discovery rule that starts the period when the injury and its cause were known or reasonably should have been known, though states apply it narrowly in ordinary motor vehicle cases where the collision itself was plainly the cause. Treat the discovery rule as an argument you might need rather than a schedule you can rely on, and keep the medical record dated and specific so the argument is available if you ever have to make it.
4. Tolling for minors, and why it cuts both ways
When the injured person is a child, most states toll the limitation period so that it does not begin, or does not expire, until some period after the child turns eighteen. That is genuinely protective, and it means a claim for a hurt eight-year-old may still be viable long after a parent's own claim from the same crash has expired. Two cautions belong next to it. Tolling for minors frequently does not extend a government notice deadline, and a parent's claim for the child's medical expenses may run on the ordinary adult schedule. Check both separately rather than assuming the child's protection covers the household.
5. The insurer's own timelines, which are contractual rather than legal
Your own policy imposes duties that have nothing to do with the statute: prompt notice of the accident, cooperation, an examination under oath if requested, and proof of loss submitted within a stated period. This matters most for uninsured and underinsured motorist coverage, medical payments coverage, and personal injury protection benefits, where some policies also set a contractual suit limitation shorter than the state's. Missing a proof-of-loss date rarely ends a claim against the at-fault driver, but it can end the coverage you were counting on to bridge the gap. Read the conditions section, note every date, and send documents in a way that produces a receipt.
Motor vehicle crash reporting and safety oversight sit with the National Highway Traffic Safety Administration, but no federal agency will tell you when your particular claim expires. Do the arithmetic yourself, in writing, on a single page: the crash date, the state period, any notice deadline, the child's eighteenth birthday if one applies, and the policy conditions. Then set your reminders well ahead of the earliest date on the page, because the whole point of checking early is having room to act.