Every current or prospective captive owner has at least one simple thing in common. They believe they manage their risk better than the commercial market gives them credit for and they want to retain premium dollars that have previously been lost to the carrier. While this sentiment is often correct, the need to be insulated from an unavoidable catastrophic loss can be invaluable in protecting the captives balance sheet. This is where reinsurance comes in.
Reinsurance is the tool that can limit the catastrophic loss the captive. It determines how much volatility the captive retains, and how confidently the captive can grow into new lines and larger retentions over time. For captive owners, understanding reinsurance is central to how the captive is capitalized and how to confidently sleep at night knowing you aren't one large loss away from insolvency.
The simplest definition of reinsurance is "insurance for insurance companies". With reinsurance, an insurer transfers a portion of risk to another insurer, the reinsurer, in exchange for a share of the premium. The insurer transferring the risk is known as the ceding company. The policyholder is almost never aware of the transaction; their policy, claims process, and relationship with the issuing insurer remain unchanged.
Reinsurance generally takes one of two forms. Quota share and excess of loss (XoL). In a quota share arrangement, the reinsurer takes a percentage of premium and pays a defined percentage of every loss. In a non-proportional arrangement, often called excess of loss, the ceding company retains losses up to a defined retention and the reinsurer responds to losses above it. Reinsurance can also be placed on a treaty basis, covering an entire book or line of business, or on a facultative basis, negotiated risk by risk.
Captives frequently sit on both sides of this relationship. In a fronted program, the fronting carrier issues the policy, and cedes the risk to the captive through a reinsurance agreement. The captive becomes the reinsurer in that transaction and can then purchase its own reinsurance to protect against losses beyond what it can comfortably absorb. Understanding which role the captive occupies at each layer is crucial in understanding reinsurance, and how to structure it appropriately.
Reinsurance and excess insurance are frequently confused because both respond to losses above a certain threshold. The distinction lies in who is buying the coverage and whose balance sheet is being protected.
Excess insurance is purchased by the insured. The insured buys a primary policy, then buys excess or umbrella coverage to sit above the primary limit and responds once that limit is exhausted. The excess insurer issues a policy directly to the insured, and the coverage expands the total limits available to pay third parties or the insured's own losses. Excess insurance adds capacity to the insurance program.
Reinsurance is purchased by an insurer. The contract runs between the ceding company and the reinsurer, and the insured generally has no direct rights under it. Reinsurance does not increase the limits available to the policyholder. Instead, it changes how losses within those limits are funded behind the scenes, stabilizing the insurer's results and protecting its capital.
The Key Distinction: Excess insurance protects the insured by adding limits above the primary program. Reinsurance protects the insurer by sharing the losses it has already agreed to pay. For a captive owner, excess insurance is a decision about how much total coverage the business needs in total. Reinsurance is a decision about how much risk the captive retains.
The two often coexist in the same program. A parent company might have its captive write a primary layer, purchase commercial excess coverage above the captive's limit, and have the captive buy reinsurance to limit its exposure within the primary layer. Each piece serves a different purpose, and each is priced and regulated differently.
For most captives, reinsurance conversations center on two forms of non-proportional protection, commonly referred to together as spec and agg.
Specific reinsurance, sometimes called per-occurrence or per-claim protection, caps the captive's exposure to any single loss. The captive retains each claim up to a specific retention, and the reinsurer responds to the portion of an individual loss above it. Specific protection is the captive's defense against severity: the single catastrophic claim, the large verdict, or the unexpected event that would otherwise consume years of accumulated surplus in one policy period.
Aggregate reinsurance, often structured as aggregate stop loss, caps the captive's total retained losses over a policy period. Once the sum of retained losses reaches the aggregate attachment point, the reinsurer responds to the excess. Aggregate protection is the captive's defense against frequency: a year in which no single claim is catastrophic, but the accumulation of ordinary claims runs well beyond what was expected and funded.
Used together, specific and aggregate reinsurance put a boundary around the captive's worst-case outcome. The specific retention limits the damage any one claim can do, and the aggregate attachment limits the damage the year as a whole can do. That boundary is what allows the captive owner, the regulator, and the fronting carrier to evaluate the captive's capital position with confidence.
How much reinsurance to buy is based on risk tolerance, and risk tolerance begins with an honest assessment of the captive's capital, the parent companies balance and its commitment to risk management. Surplus is the captive's cushion against adverse results, risk management is the predictability of these results. The question every captive owner should be able to answer is how large a loss, or how poor a year, the captive can absorb without impairing its surplus, triggering a capital call from the parent.
Capital is only part of the answer. Risk tolerance also reflects the parent organization's appetite for volatility. Some parent companies are comfortable with meaningful swings in captive results because they view the captive as a long-term funding vehicle and have the financial strength to ride out a difficult year. Others need the captive's results to be predictable, because volatility in the captive flows through to consolidated financial statements, budgets, or stakeholder expectations. Two captives with identical surplus can reasonably arrive at very different reinsurance programs because their parents think about risk differently.
Other parties also shape the answer. Domicile regulators review a captive's reinsurance program as part of its business plan and ongoing solvency oversight. Fronting carriers evaluate the captive's retained exposure when setting collateral requirements, since the fronting carrier remains responsible to policyholders if the captive cannot pay. A well-designed reinsurance program can strengthen the captive's position in both conversations.
The practical output of this assessment is a set of retentions. The specific retention should be sized so that a single large loss is painful but survivable. The aggregate attachment should be sized so that an unfavorable year, well beyond expectations, still leaves the captive adequately capitalized. Retentions set too low mean the captive pays reinsurers to absorb losses it could have funded itself. Retentions set too high mean the captive is exposed to outcomes its surplus was never built to withstand.
There is no universal rule for when a captive should purchase reinsurance, but several circumstances make the case particularly strong.
A newly formed captive has not yet had time to build surplus. Its capital is typically close to the minimum required by the domicile and the business plan, and a single adverse loss early in its life can set the program back years. Reinsurance allows a young captive to write meaningful premium while its surplus matures, and to grow its retentions as its balance sheet strengthens.
Lines of business exposed to large, infrequent losses, such as commercial auto liability, general liability in litigious jurisdictions, and excess liability layers, are natural candidates for specific protection. In the current social inflation environment, the gap between an expected loss and a worst-case verdict has widened significantly, and a captive retaining these lines without a severity backstop is taking on more tail risk than its loss history may suggest.
When a captive adds a line of business, it often does so with less loss history than it has for its established lines. Actuarial projections carry more uncertainty, and that uncertainty is itself a risk. Aggregate protection in particular can give the captive room to learn how a new line behaves before committing its full surplus to it.
In a fronted program, the fronting carrier's collateral requirements are driven in large part by the captive's retained exposure. A reinsurance program that caps the captive's worst case can support a more efficient collateral conversation, freeing capital that would otherwise be tied up in letters of credit or trust arrangements.
Reinsurance is not free, and more is not always better. A mature, well-capitalized captive writing predictable, high-frequency, low-severity exposures may find that the cost of reinsurance exceeds the value of the protection. In that case, the captive's own surplus may be the more efficient source of risk capital. The goal is not to eliminate volatility entirely, but to transfer the portion of volatility the captive cannot or should not carry.
Not all captive owners will elect to purchase reinsurance as they will want to retain 100% of the risk and premium. Those that want to "stair-step" their way up the risk spectrum, may initially elect to purchase reinsurance to limit their total exposure to catastrophic loss.
Captives Insure is able to provide both specific and aggregate reinsurance for captive programs. Because Captives Insure already structures the programs it fronts, we have direct visibility into the exposures, loss experience, and retentions that drive reinsurance pricing. That allows reinsurance to be evaluated alongside the fronting arrangement rather than as a separate, disconnected placement.
This capability is designed to complement the work of the captive's existing advisors. Captive managers, brokers, and actuaries remain central to setting retentions, evaluating alternatives, and aligning the reinsurance program with the captive's business plan. Captives Insure's role is to provide a responsive pricing option for spec and agg protection that fits cleanly within the program being built.
Captives Insure works alongside captive managers, brokers, and advisors to provide AM Best-rated fronting paper and specific and aggregate reinsurance pricing for captive programs.
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