Glossary term
Excess of Loss Reinsurance
Excess of loss reinsurance pays when an insurer's covered loss exceeds a specified retention or attachment point.
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What Is Excess of Loss Reinsurance?
Excess of loss reinsurance is a reinsurance arrangement where the reinsurer pays covered losses above a specified amount. The insurer keeps losses up to its retention or attachment point, and the reinsurer responds above that layer, subject to contract limits.
It is commonly used to protect insurers from severe individual losses, catastrophe events, or unexpectedly large claim concentrations.
Key Takeaways
- Excess of loss reinsurance is triggered above a stated retention.
- It can apply per risk, per occurrence, or on an aggregate basis.
- The insurer keeps the first layer of loss.
- Contract wording determines limits, exclusions, reinstatements, and covered events.
Retention and Layers
The structure is easiest to understand as layers. The insurer pays the lower layer. The reinsurer pays the covered excess layer. Additional reinsurers may cover higher layers.
Layer | Who Pays |
|---|---|
Ground-up loss below retention | The primary insurer. |
Loss above retention | The reinsurer, up to its limit. |
Loss above reinsurance limit | The insurer or another higher reinsurance layer. |
Excluded loss | Depends on contract exclusions and coverage terms. |
How Insurers Use It
An insurer might buy excess of loss reinsurance to manage catastrophe risk, high-severity liability claims, large property losses, or volatility in a specific line of business. The coverage can reduce earnings volatility and protect capital.
Unlike quota share reinsurance, excess of loss reinsurance does not automatically share every premium and every loss proportionally. It is designed around severity above a threshold.
What to Watch
Important terms include the attachment point, limit, covered lines, loss occurrence definition, reinstatement provisions, exclusions, and whether coverage is per risk, per occurrence, or aggregate.
Layered Risk Transfer
Excess of loss reinsurance is built around layers. The insurer keeps losses up to a retention amount, and the reinsurer pays covered losses above that amount up to a stated limit. For example, a contract might cover losses above $5 million and up to $25 million for a defined class of business.
This structure is useful when the insurer is comfortable with ordinary claims but wants protection against severe claims, catastrophe events, or unusually large accumulations. It can stabilize earnings and protect capital without transferring every small loss.
Per-Risk and Catastrophe Use
Excess of loss coverage can apply to a single risk, a single event, or an aggregate pattern of losses depending on the contract. Per-risk coverage might protect against one very large insured loss. Catastrophe excess of loss coverage might protect against many claims arising from the same hurricane, wildfire, earthquake, or other event.
The contract wording matters. Retentions, limits, reinstatements, exclusions, event definitions, and claims handling terms determine how much protection the insurer actually has when losses arrive.
Capital and Pricing Context
For insurers, excess of loss reinsurance is a capital management tool. It can reduce the chance that one event overwhelms surplus, but it also has a cost. If reinsurance prices rise, insurers may retain more risk, change underwriting standards, or raise premiums.
For policyholders, the reinsurance arrangement is usually indirect. Still, reinsurance availability can affect whether insurers are willing to write coverage in catastrophe-exposed markets and at what price.
Why Retention Matters
The retention is the amount the insurer keeps before reinsurance responds. A higher retention can reduce reinsurance cost but leaves the insurer exposed to more loss. A lower retention can provide more protection but may be expensive or unavailable in hard reinsurance markets.
Choosing the layer is therefore a capital decision. The insurer is deciding how much volatility it can absorb and how much severe-loss protection it is willing to buy from the reinsurance market.
The Bottom Line
Excess of loss reinsurance is a risk layer above an insurer's retained loss. It helps insurers absorb large claims without transferring every ordinary loss.