In the world of insurance, risk is inevitable. No matter how much preparation and mitigation is done, certain unforeseen events can cause loss and damage. This is where reinsurance comes into play – the process of transferring a portion of insurance risk from one insurer to another insurer. Reinsurance agreements come in many types, and this article will provide an overview of the most common ones.

Proportional Reinsurance

Proportional reinsurance, also known as pro rata reinsurance, involves a proportional sharing of risk and premium between the primary insurer and the reinsurer. In this type of agreement, the reinsurer agrees to accept a specific percentage of each policy issued by the primary insurer, and in turn, is responsible for paying an equal percentage of any claim that arise.

Non-Proportional Reinsurance

Non-proportional reinsurance, on the other hand, involves the reinsurer taking on a certain portion of the risk in exchange for a guaranteed payout. This can be done through excess of loss or stop-loss reinsurance. With excess of loss reinsurance, the reinsurer agrees to pay any claims exceeding a certain amount, while stop-loss reinsurance involves the reinsurer taking on claims up to a certain limit.

Facultative Reinsurance

Facultative reinsurance is a per-policy based agreement where the insurer seeks out a reinsurer to take on a particular risk, typically for large or complex risks. This type of reinsurance is typically negotiated on a case-by-case basis, with the reinsurer providing a quote for each specific policy.

Treaty Reinsurance

Treaty reinsurance is an agreement where the reinsurer agrees to accept a specific type of risk from the primary insurer, usually for a defined period. This type of reinsurance is commonly used for smaller risks, with the reinsurer providing a set risk limit.


Reinsurance is a crucial aspect of the insurance industry, and understanding the different types of reinsurance agreements is important for both insurers and reinsurers. The choice of agreement ultimately depends on the type of risk involved, the level of coverage required, and the financial goals of both parties. By implementing the right reinsurance agreement, insurers can mitigate risk and provide a greater level of protection to their policyholders.