Reinsurance

Reinsurance is insurance that insurance companies purchase to protect themselves from large losses. When a carrier issues a policy, they transfer a portion of that risk to a reinsurer like Munich Re or Swiss Re. If a major claim occurs, the reinsurer pays part of it. This allows carriers to underwrite larger policies and more risky exposures than their capital alone would support.

Reinsurance operates behind the scenes and doesn't directly affect your policy terms or claims process. You file claims with your carrier, not the reinsurer. However, reinsurance indirectly benefits you by allowing your carrier to write policies with higher limits and take on more risk. It provides stability to the insurance market and helps carriers remain solvent after catastrophic events.

Insurance companies use reinsurance to manage their own risk exposure and protect their financial stability. Without reinsurance, carriers would need enormous capital reserves to cover potential large losses. Reinsurance lets carriers spread risk, underwrite policies beyond what their balance sheet could support alone, and remain solvent after catastrophic events like hurricanes or major liability claims.

Reinsurance is described two ways. By how it is arranged: treaty reinsurance covers a whole class of policies automatically under one agreement, while facultative reinsurance is placed one risk at a time. By how losses are shared: proportional reinsurance, such as quota share, splits premiums and losses by a set percentage, while non-proportional reinsurance, such as excess of loss, pays only above an agreed retention. A single program can combine these, for example a proportional treaty.

Treaty reinsurance is a single agreement that covers a defined class or portfolio of policies, so qualifying risks are reinsured automatically without reviewing each one. It gives carriers predictable, ongoing protection and lets underwriters write new business without seeking approval for every risk. Treaties are structured as either proportional or non-proportional.

Facultative reinsurance is placed for a single risk or policy and negotiated individually, and the reinsurer can accept or decline each risk it is offered. It is used for unusual, very large, or hard-to-place exposures that fall outside a treaty. Because each risk is underwritten separately, it is more labor intensive but allows tailored coverage.

Under proportional reinsurance, such as quota share, the insurer and reinsurer share premiums and losses in a fixed proportion from the first dollar. Under non-proportional reinsurance, such as excess of loss, the reinsurer pays only the part of a loss that rises above an agreed retention, up to a limit, so it responds to larger or accumulated losses rather than every claim.

Reinsurance capacity is the amount of coverage reinsurers are willing and able to provide, driven by the capital they hold and their appetite for a line of business. When capacity is abundant, reinsurance is easier to buy and prices tend to soften; when it is scarce, terms tighten. New or complex exposures like cyber, space, and advanced technology can be capacity-constrained because reinsurers have less loss history to price them.

A managing general agent, or MGA, underwrites a specialized program under authority delegated by a carrier. A fronting carrier is a licensed insurer that issues the policies and then cedes most or all of the risk to reinsurers, while remaining responsible to policyholders. Reinsurers often supply much of the capacity behind these programs, which is how specialized or emerging risks reach the reinsurance market.

Parametric reinsurance pays a preset amount when an objective, measurable trigger is met, such as a hurricane of a set wind speed or an earthquake above a chosen magnitude, rather than reimbursing the actual loss. Payouts can be fast and transparent, with the main trade-off being basis risk, the gap between the payout and the true loss. It is often used for natural catastrophes and newer perils where loss data is thin.