Is There a Time Limit to File a UM or UIM Claim?
After a crash involving an uninsured or underinsured driver, it’s easy to assume there’s only one deadline to worry about, but UM and UIM claims usually come with their own separate clock.
The short answer
Yes. Beyond the general statute of limitations for filing a lawsuit, most auto policies include their own contractual notice requirements for uninsured and underinsured motorist (UM/UIM) claims, often requiring prompt notice to your own insurer after an accident. These internal deadlines can be shorter than a state’s lawsuit statute of limitations, and missing them can jeopardize the claim even if you’d still be within the general legal deadline.
Why there are two separate deadlines
A UM or UIM claim is really a claim against your own insurance company under your own policy contract, even though it arises from someone else’s negligence. That contractual relationship means the policy itself can impose notice and filing requirements, separate from whatever a state’s statute of limitations says about suing another driver. So while the general injury lawsuit deadline might run for a few years, the policy’s own requirement to notify the insurer of a potential UM/UIM claim can be considerably shorter, sometimes measured in months.
What “prompt notice” usually means
Policies often use language requiring notice “as soon as practicable” or within a specific window after the accident. This exists partly because your own insurer, standing in the shoes of the uninsured driver for purposes of the claim, wants the chance to investigate while evidence is fresh — similar to why any insurance claims adjuster prefers early notice on any type of claim. Waiting too long can weaken the insurer’s ability to investigate and can, in some cases, become grounds to dispute the claim on procedural grounds separate from its actual merits. Understanding how filing an insurance claim works more generally can help set expectations for what prompt notice actually involves.
How this interacts with the underlying accident claim
If the accident also involves a claim against the at-fault driver’s own insurer, that claim runs on its own statute of limitations timeline, which is often longer and governed by state law rather than the policy contract. It’s possible to be well within the deadline to sue the at-fault driver while having already missed a shorter internal deadline for notifying your own insurer of a UM/UIM claim. This is part of why understanding how an underinsured motorist claim’s value is calculated matters early on — the calculation and the claim itself depend on timely notice being given in the first place, not just eventual filing of a lawsuit.
What to weigh
- Read your own policy’s notice language. The specific wording and timeframe vary by insurer and by state.
- Report promptly even if fault is unclear. Early notice preserves options even before all the facts are settled.
- Track more than one deadline. A lawsuit deadline against the at-fault driver and a notice deadline to your own insurer are not the same clock.
The takeaway
Because UM and UIM claims are grounded in your own policy contract rather than only state lawsuit deadlines, they typically carry additional, often shorter, notice requirements. Treating notice to your own insurer as an early, separate task after any accident involving an uninsured or underinsured driver helps avoid losing a claim to a technicality rather than its actual facts.