How Insurers Build LTD Reserves
The moment a long-term disability claim is approved, the insurer sets aside money for its entire expected future cost. Almost everything an insurer does on a disability file makes sense once you understand that number.
What a reserve is
A long-term disability claim is not an expense in the month it is paid. It is a commitment that may run for years or decades. So when a claim is approved, the insurer books a reserve: the present value of all the payments it expects to make on that claim over its expected duration.
That reserve is charged against the plan’s experience immediately, not gradually. On a small group, this is why a single approved LTD claim can reshape a renewal in a way that no amount of dental utilisation ever would.
Expected duration
How long the insurer expects the claim to run, drawn from actuarial tables and adjusted for diagnosis, age, occupation and the contract’s definition of disability.
Duration assumptions are where reserves are most sensitive. A change in expected duration moves the reserve far more than a change in the monthly benefit amount.
Present value
Future payments discounted back to today’s dollars using an assumed interest rate.
A falling discount rate raises reserves across an insurer’s whole block, independent of anything happening on your plan.
Reserve release
What happens when a claim closes earlier than assumed — the unused portion of the reserve is released back and improves the plan’s experience.
This is the mechanism behind return-to-work economics. Closing a claim early does not just stop payments; it releases the reserve behind them, which is a much larger number.
Pooling of disability claims
On small groups, disability reserves are frequently pooled rather than charged fully to the group’s own experience.
Ask explicitly how disability is treated on your plan. If it is pooled, a claim will not hit your renewal the way you fear. If it is not, one claim can dominate several years of experience.
Reserves are built on assumptions — duration, discount rate, likelihood of recovery. When a file’s real circumstances diverge from those assumptions and nobody updates the file, the reserve stops reflecting reality. That is as likely to work against the plan as for it.