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🏗️ '''Insurance tower''' is a layered structure of [[Definition:Insurance coverage | coverage]] in which a large or complex [[Definition:Risk | risk]] is divided vertically into successive tiers — each held by one or more [[Definition:Insurance carrier | insurers]] or [[Definition:Reinsurer | reinsurers]] — so that no single entity bears the entire exposure. The lowest layer, known as the [[Definition:Primary insurance | primary]] or [[Definition:Working layer | working layer]], attaches at the [[Definition:Retention | insured's retention]] and responds first when a [[Definition:Loss | loss]] occurs. Above it sit one or more [[Definition:Excess insurance | excess]] layers, each with its own [[Definition:Attachment point | attachment point]] and [[Definition:Policy limit | limit]], stacking upward until the total tower reaches the desired aggregate capacity. This architecture is fundamental to [[Definition:Commercial insurance | commercial]] and [[Definition:Specialty insurance | specialty]] lines — particularly [[Definition:Property insurance | property]], [[Definition:Casualty insurance | casualty]], and [[Definition:Directors and officers liability insurance (D&O) | D&O]] programs — where single-carrier capacity rarely matches the magnitude of the exposure.

⚙️ Constructing a tower is a collaborative exercise typically led by an [[Definition:Insurance broker | insurance broker]] or [[Definition:Wholesale broker | wholesale intermediary]] who negotiates terms with multiple markets. Each layer has its own [[Definition:Premium | premium]], informed by [[Definition:Actuarial analysis | actuarial analysis]] of the probability that losses will penetrate to that altitude. Lower layers command higher rates per unit of limit because they face greater [[Definition:Loss frequency | loss frequency]], while higher [[Definition:Excess layer | excess layers]] price more for [[Definition:Loss severity | severity]] risk — catastrophic or [[Definition:Shock loss | shock]] events that breach multiple tiers. The terms across layers are ideally coordinated through [[Definition:Follow form | follow-form]] provisions so that coverage intent remains consistent from bottom to top, though each participating [[Definition:Underwriter | underwriter]] negotiates its own [[Definition:Policy terms and conditions | terms and conditions]], [[Definition:Exclusion | exclusions]], and pricing.

📐 Tower design carries strategic implications for both the insured and the markets. For the buyer, the goal is to secure adequate total limits at an efficient blended cost, balancing how much risk to retain at the bottom against the incremental expense of higher layers. For participating carriers, position in the tower dictates the risk-return profile: [[Definition:Lead insurer | lead]] markets on lower layers have more influence over [[Definition:Claims handling | claims handling]] and [[Definition:Loss adjustment | settlement]], while upper-layer participants may have limited involvement until a major loss triggers their coverage. Market dynamics — such as capacity availability after a heavy [[Definition:Catastrophe loss | catastrophe loss]] year — can compress or expand towers, and [[Definition:Reinsurance | reinsurance]] placements often mirror the layered approach, creating parallel towers that transfer portions of each layer further into the global risk transfer chain.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Excess insurance]]
* [[Definition:Attachment point]]
* [[Definition:Primary insurance]]
* [[Definition:Layered program]]
* [[Definition:Lead insurer]]
* [[Definition:Follow form]]
{{Div col end}}

Definition:Insurance tower - Revision history

PlumBot: Bot: Creating new article from JSON