Insurers can stop writing a line of business and still carry claims for many years. Long-tail liabilities—such as casualty, workers’ compensation or certain specialty portfolios—can develop differently from the reserves originally established. Retroactive reinsurance is designed to address that reserve risk.
Munich Re describes LPT and ADC as two basic forms of retroactive reinsurance. Swiss Re similarly uses these structures to support capital efficiency, reserve certainty and legacy-portfolio management.
LPT vs. ADC at a glance
| Feature | Loss Portfolio Transfer (LPT) | Adverse Development Cover (ADC) |
|---|---|---|
| Basic structure | Retrospective quota-share style transfer of existing reserves | Retrospective excess-of-loss / stop-loss style protection |
| What is transferred? | A share of future claim payments on a defined legacy portfolio | Losses above an agreed reserve attachment point |
| Upside participation | Can share favorable as well as unfavorable development depending on structure | Generally focused on adverse development above retention |
| Main objective | Transfer reserve obligations, release capital, simplify run-off | Cap reserve deterioration and protect balance-sheet certainty |
How a Loss Portfolio Transfer works
In a simplified LPT, an insurer pays a reinsurance premium and cedes a defined portion of existing unpaid losses. The reinsurer then reimburses covered future claim payments according to the contract. The transaction can reduce the insurer’s net reserve exposure, although accounting, regulatory and collateral treatment depend on jurisdiction and structure.
How an Adverse Development Cover works
An ADC typically attaches above the insurer’s selected reserve level. If designated legacy claims develop beyond that attachment point, the reinsurer pays covered amounts up to the ADC limit. The insurer retains losses below the attachment and may retain amounts above the reinsurance limit.
Simple example
An insurer has a legacy casualty portfolio with $500 million of carried reserves. It is concerned that ultimate losses could rise materially.
- LPT approach: transfer an agreed share of the $500 million reserve portfolio to a reinsurer.
- ADC approach: keep the base reserves but buy protection that begins, for example, if covered losses exceed an agreed attachment level.
The actual economics are more complex and can include discounting, limits, corridors, co-reinsurance, claims control and collateral.
Why insurers use retroactive reinsurance
- Reduce reserve volatility from older underwriting years.
- Release regulatory or rating-agency capital, where recognized.
- Simplify a run-off or non-core portfolio.
- Support mergers, acquisitions or restructuring.
- Improve certainty around future legacy-claim payments.
- Free management resources for current underwriting.
LPT and ADC do not necessarily create legal finality
Reinsurance is generally an agreement between the insurer and reinsurer; the original insurer can remain legally responsible to policyholders. True legal finality usually requires a separate transfer mechanism permitted by applicable law. This distinction matters in run-off transactions.
Key diligence questions
Parties analyze reserve quality, claims data, inflation, social inflation, coverage disputes, latent exposures, settlement patterns, investment assumptions, claims-handling control, collateral and counterparty credit. Because the subject losses have already occurred or arisen from past exposure periods, data quality is central to pricing.
Frequently asked questions
Is an LPT the same as selling an insurance company?
No. An LPT is a reinsurance transaction covering a defined loss portfolio; ownership of the insurer does not necessarily change.
Does an ADC remove all reserve risk?
No. The insurer retains the attachment amount, losses above the limit and any excluded exposures.
Can one transaction combine LPT and ADC features?
Yes. Structured retroactive solutions can combine elements of both.
Are these products only for troubled insurers?
No. They are also used strategically for capital management, M&A, run-off simplification and balance-sheet optimization.
Sources & further reading
Reviewed October 2, 2026. LPT and ADC accounting, capital credit, collateral and legal effect depend on contract terms and jurisdiction.
