If Social Security approved your disability claim after your long-term disability insurer had already been paying you, yes, you almost certainly have to pay back some of that long-term disability money once your SSDI back pay arrives. Paying back long-term disability after SSDI is required by the offset provision in nearly every LTD policy, and you likely signed a reimbursement agreement acknowledging that obligation when your LTD claim was first approved. The good news: the amount you actually owe is usually smaller than the insurer’s first demand letter suggests, and several rules work in your favor.
Why the Insurer Gets to Ask for the Money Back
LTD policies are designed to replace a percentage of your income, not to stack on top of SSDI. Almost every policy contains an offset clause (sometimes called a reimbursement or subrogation provision) that reduces your LTD benefit dollar-for-dollar by any government disability payment you receive. While your SSDI claim was pending, the insurer paid your full LTD benefit as an advance against the SSDI it expected you to eventually win. When Social Security finally sends a retroactive lump sum, the insurer wants that advance back for the months both benefits covered.
This structure is standard in employer-sponsored group plans, which are governed by the federal Employee Retirement Income Security Act. ERISA gives insurers a recognized legal route to recover overpayments from plan participants.1U.S. Department of Labor. Compliance Assistance – Group Health and Disability Plans Benefit Claims Procedure Regulation
Which Months Actually Overlap
The insurer can only claim repayment for months where you were entitled to both LTD and SSDI at the same time. That sounds obvious, but it’s where the first big mistake often shows up in demand letters.
SSDI benefits don’t start the month you become disabled. Federal law imposes a five-month waiting period, five consecutive calendar months of disability with no SSDI payable.2Office of the Law Revision Counsel. 42 USC 423 – Disability Insurance Benefit Payments Your first SSDI check covers the sixth month after your established onset date. Your LTD, meanwhile, started after its own elimination period, often 90 or 180 days.
Say Social Security fixes your onset date in January. SSDI first becomes payable in June. Your LTD insurer started paying you in April, once its 90-day elimination period ended. April and May are not overlap months, because no SSDI was payable then. The overlap begins in June. If the insurer’s letter counts months inside the five-month waiting period, the demand is too high.
How the Repayment Amount Is Calculated
The insurer works from your Social Security Notice of Award, which states your monthly SSDI benefit and the retroactive period it covers. The gross overpayment equals the SSDI amount for each overlapping month, not the LTD amount for those months. If your SSDI benefit is lower than your LTD benefit, the insurer only gets the SSDI figure back.
A worked example: your LTD insurer paid you $2,000 a month for 18 months. Social Security then awards you $1,200 a month, retroactive for 14 of those 18 months (four months fell inside the waiting period or before your LTD started). Your SSDI lump sum is $16,800, and the gross overpayment is that same $16,800.
Many policies also contain a minimum monthly benefit, a floor that keeps your LTD from dropping to zero after the offset. A common floor is $100 a month or 10% of your pre-offset LTD benefit, whichever is greater. If your policy has one, the insurer owes you that floor for each overlap month, which trims the net overpayment. Check the summary plan description for the exact figure.
The Attorney Fee Credit That Lowers Your Bill
If a representative helped win your SSDI claim, their fee came out of your back pay before you saw a dollar of it. Under federal rules, that fee can’t exceed the lesser of 25% of past-due benefits or $9,200.3Social Security Administration. Fee Agreements The $9,200 cap has been in effect since November 30, 2024, and remains current through 2026.4Federal Register. Maximum Dollar Limit in the Fee Agreement Process
Because the insurer directly benefits from that attorney’s work (without an SSDI approval, it would keep paying full LTD indefinitely), most policies require the insurer to credit you for a proportionate share of the fee. The standard approach is pro-rata. If the attorney took 25% of your back pay, the insurer reduces its repayment demand by 25%. On a $16,800 gross overpayment, a 25% credit cuts $4,200, bringing your bill down to $12,600.
Not every insurer applies this credit on its own. Send the insurer Social Security’s documentation of the withheld fee and specifically request the credit. Other costs incurred to win the SSDI claim, such as fees for obtaining medical records, may also be deductible depending on your policy language.
Dependent Benefits: Worth Pushing Back On
When you qualify for SSDI, Social Security may also pay auxiliary benefits to your spouse or minor children based on your earnings record. Some LTD insurers try to include those family benefits in the offset, effectively reducing your LTD payment by money that was never paid to you personally.
Whether the insurer can do this depends on the policy language, and courts have gone both ways. Policies that offset payments for “loss of time” have sometimes been read to exclude dependent benefits, on the theory that those payments support the children, not the disabled worker. Broader language expressly listing “Social Security benefits payable to the employee or the employee’s dependents” gives the insurer a stronger argument.
If dependent benefits are in the offset, look up the exact definition of “other income” or “deductible sources of income” in your policy. Ambiguous language should be read in your favor. Dependent benefits for a spouse and two children can add hundreds of dollars a month to the offset, so this is worth fighting over.
Checking the Demand Letter
The insurer’s repayment letter usually arrives within a few weeks of your SSDI award and typically gives you 30 days to pay. Before writing a check, compare every number to your Social Security Notice of Award: the overlap dates, the monthly SSDI amount, the attorney fee credit, and the minimum benefit. Errors skew toward the insurer more often than you would expect.
Common mistakes to watch for:
- Wrong overlap start date. Months inside the SSDI five-month waiting period are counted, even though no SSDI was payable then.
- Missing attorney fee credit. The gross overlap is billed without reducing for the fee your representative already took.
- Dependent benefits included. Family auxiliary payments are added to the offset without policy language that clearly supports it.
- No minimum benefit applied. The floor payment your policy guarantees during the overlap months is ignored.
The usual way to settle is paying the confirmed amount directly out of your SSDI lump sum. If you can’t cover it in full, call the insurer before the deadline and ask about a payment plan or an installment deduction from your ongoing monthly LTD benefit. Don’t ignore the demand: the insurer can suspend your future LTD payments entirely until the debt is resolved, and under ERISA it can pursue legal action.
Limits on What the Insurer Can Collect
Insurers have a contractual right to repayment, but federal law limits how they can enforce it. Social Security benefits are protected by an anti-alienation provision that blocks any creditor from garnishing, levying, or attaching them.5Office of the Law Revision Counsel. 42 US Code 407 – Assignment of Benefits Your insurer can’t intercept the SSDI payment at the source. It can ask you to pay voluntarily or file a lawsuit to recover the funds once they’re in your hands.
Even in court, ERISA restricts insurers to “equitable relief,” which generally means pursuing specifically identifiable funds rather than your general assets.6Office of the Law Revision Counsel. 29 USC 1132 – Civil Enforcement The Supreme Court clarified in 2016 that if a beneficiary already spent the disputed funds on ordinary expenses like food, services, or travel, the money becomes untraceable and the insurer loses its ability to reach the person’s other assets.7Justia Law. Montanile v. Board of Trustees of National Elevator Industry Health Benefit Plan If the SSDI lump sum is still in your bank account or you used it to buy a car, the insurer can assert an equitable lien against those traceable assets.
None of this is a strategy to spend down your lump sum. But if you genuinely used the money for living expenses before the demand came, your exposure may be more limited than the letter suggests. An ERISA attorney can evaluate whether the insurer’s claim survives the traceability requirement.
Don’t Overpay Taxes on Money You Gave Back
If your employer paid the LTD premiums (typical for group plans), the LTD benefits you received were taxable, and you already paid taxes on them. Now you’re returning some of that money. Without a correction, you’ll be taxed on income you didn’t keep.
Federal law provides relief through the “claim of right” doctrine. If the amount you repay is more than $3,000, you can choose between two methods and use whichever gives you a lower tax bill:8Internal Revenue Service. Publication 525 – Taxable and Nontaxable Income
- Itemized deduction. Deduct the repaid amount as an other itemized deduction on Schedule A for the year you repaid it.
- Tax credit. Recalculate what your tax would have been in the earlier year if you had never received that income, then take the difference as a credit against your current year’s tax.
The credit method often wins when the repayment is large relative to your current income, because it effectively refunds tax at the rate you originally paid. If the repayment is $3,000 or less, the deduction was eliminated for tax years after 2017 and no credit is available at that level.9Office of the Law Revision Counsel. 26 US Code 1341 – Computation of Tax Where Taxpayer Restores Substantial Amount Held Under Claim of Right A tax professional familiar with disability benefits can run both calculations before you file.
Individual Policies Work Differently
Everything above assumes an employer group LTD policy under ERISA, which is the common scenario. If you bought an individual disability policy directly from an insurer, ERISA doesn’t apply. State insurance and contract law governs instead, ambiguities are generally construed against the insurer, and state-law remedies like bad-faith claims may be available. The Supreme Court’s ERISA traceability limits don’t automatically protect you, because the insurer would sue under state contract law. Offset provisions in individual policies vary more widely than in group plans, and some individual policies don’t offset SSDI at all. If you have an individual policy and a repayment demand, consult an attorney who handles insurance disputes in your state.