The full ERISA LTD timeline, from denial to lawsuit
Every deadline this site describes fits into one sequence. Here is the whole claim lifecycle in one place, with the regulation behind each step.
Reading about the 180-day appeal deadline, the plan's decision deadlines, and deemed exhaustion separately can make the overall process harder to picture. Here is how the pieces fit together for a typical disability claim, each step sourced to the same regulation, 29 CFR 2560.503-1.
Step one: the plan decides your initial claim, generally within 45 days of receiving it, extendable by up to two further 30-day periods for a maximum of 105 days, each extension requiring notice before the prior period expires. Step two: if the claim is denied, the plan must give you at least 180 days from your receipt of that denial to file an internal appeal, a floor your specific plan document may extend but never shorten. Step three: once you appeal, the plan generally must decide within 45 days, extendable once by up to 45 more days for special circumstances, for a maximum of 90 days.
Step four depends on your plan's structure: some plans require only the one appeal above, others require a second internal appeal, and each appeal gets its own 45-day decision window rather than sharing one. Only once every appeal your plan requires is complete, or the narrow deemed-exhaustion exception applies, does a federal lawsuit under ERISA become the available next step, and that lawsuit is generally limited to the record built during the internal appeal, which is why building your evidence file during the appeal matters more than anything that happens afterward.
Step five is the deadline that is easiest to assume does not exist. A plan or policy can set its own cut-off for starting the lawsuit, a contractual limitations period, and for a disability claim the regulation requires the final denial notice to "describe any applicable contractual limitations period that applies to the claimant's right to bring such an action, including the calendar date on which the contractual limitations period expires for the claim." That date is not calculable from anything on this page: it comes from your plan document and it is stated in your notice. Finishing the appeal opens the door to court, but it does not hold the door open indefinitely.
Why the early steps matter most
Every stage after the initial denial depends on what happened before it. A missed appeal deadline generally forecloses the claim entirely. Evidence not submitted during the appeal is generally unavailable later, in front of a court applying a standard of review that itself depends on a single sentence in your plan document. And a missed contractual limitations period ends the case just as completely, without anyone reading the record you spent the appeal building. Treat the appeal, not the eventual lawsuit, as the stage where the claim is actually won or lost, and read every notice you receive for the dates it is required to give you.