Updated August 3, 2026. Quick answer: nearly every group long-term disability policy reduces what it pays by the amount Social Security disability pays you. The two benefits are not additive, and the policy usually requires you to apply for SSDI precisely so the offset can happen. What matters is that the offset does not end the way people expect.
How the offset works
A policy promising 60 percent of your prior income does not pay 60 percent on top of SSDI. It pays the difference. If SSDI covers part of the promised amount, the insurer pays the remainder. Your total is roughly the same either way — what changes is who pays it.
That is why the insurer cares so much that you apply. Every dollar Social Security pays is a dollar the insurer does not.
The overpayment trap
SSDI is frequently awarded months or years after the claim, with a lump sum of back benefits. During those months the insurer was paying you the full amount without an offset. When the back award arrives, the insurer is generally entitled to recover the overlap — and it can be a large, sudden demand for money that has already been spent.
The practical protection is simple and has to happen in advance: if you have a pending SSDI claim, set the likely back-benefit overlap aside rather than spending it. Ask the insurer in writing how the offset will be applied to a retroactive award, and keep the answer.
What is usually not offset
Policies differ, but individually purchased disability policies commonly do not offset against Social Security at all — the offset is characteristic of employer group cover. Read which one you have before assuming.
What happens at the end date
The LTD policy ends on its own terms, generally at 65 or full retirement age. Social Security does not end there — it converts to retirement benefits and continues for life. So the offset arrangement dissolves from one side only: the insurer stops, Social Security carries on.
The conversion at full retirement age · when the policy ends
Working while on both
Two separate sets of work rules apply at once, and they are not the same rules. Social Security has the trial work period and the reentitlement period; the policy has its own definition of disability and its own earnings provisions. Satisfying one does not protect you under the other.
How the trial work period is counted
Where to get help
Offset and overpayment disputes turn on the policy language and, for employer plans, on federal benefits law with short deadlines. Free legal aid and state protection and advocacy organisations handle these. Get the plan document first — for an employer plan you are generally entitled to request it in writing.
Honest gaps
Whether a particular policy offsets dependent benefits, cost-of-living increases, or other income sources varies by contract and we cannot tell you which yours does. We have not covered the tax treatment of LTD benefits, which depends on who paid the premium.
General information drawn from the Social Security Act, title 20 of the Code of Federal Regulations and SSA’s own published guidance, not legal advice. Entitlement turns on facts this page cannot see, and the figures change — the notice or award letter in your hand governs.