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🛡️ '''Excess casualty insurance''' is a form of [[Definition:Liability insurance | liability insurance]] that provides coverage above the limits of a [[Definition:Primary insurance | primary insurance]] policy, specifically within the casualty lines — encompassing [[Definition:General liability insurance | general liability]], [[Definition:Automobile liability insurance | automobile liability]], [[Definition:Employers' liability insurance | employers' liability]], and similar exposures. Unlike standard policies that respond from the first dollar (or after a deductible), excess casualty coverage sits in a higher layer and only triggers once the underlying policy's limits have been exhausted. This makes it a critical tool for businesses and organizations whose potential liability exposures could far exceed what a single primary policy can absorb.

⚙️ The mechanics hinge on a layered coverage structure. A policyholder purchases a primary casualty policy with a set limit — say, $1 million — and then buys an excess casualty policy that attaches at or above that limit, providing additional capacity of $5 million, $10 million, or more. The excess [[Definition:Insurance carrier | carrier]] generally follows the terms and conditions of the underlying policy, a principle known as "following form," though some excess policies contain their own independent terms. When a covered claim surpasses the primary limit, the excess layer responds up to its own stated limit. In complex commercial accounts, multiple excess layers may be stacked in a [[Definition:Tower of insurance | tower]], with each successive [[Definition:Excess layer | excess layer]] attaching where the one below it leaves off. [[Definition:Underwriting | Underwriters]] pricing excess casualty business evaluate not only the insured's risk profile but also the adequacy and stability of the underlying coverage.

💡 For mid-size and large commercial insureds, excess casualty insurance is often non-negotiable. A single catastrophic [[Definition:Bodily injury | bodily injury]] verdict or a mass [[Definition:Tort | tort]] event can generate damages well beyond primary policy limits, and without excess coverage, the organization's balance sheet absorbs the remainder. From the [[Definition:Insurance broker | broker's]] perspective, structuring an appropriate casualty tower — selecting carriers, negotiating attachment points, and ensuring no gaps between layers — is one of the more demanding aspects of a large account placement. For insurers and [[Definition:Reinsurer | reinsurers]], excess casualty is a line where [[Definition:Loss development | loss development]] can be long-tailed and volatile, making disciplined [[Definition:Reserving | reserving]] and [[Definition:Actuarial analysis | actuarial analysis]] essential to profitability.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Excess layer]]
* [[Definition:Excess liability]]
* [[Definition:Umbrella insurance]]
* [[Definition:Primary insurance]]
* [[Definition:Casualty insurance]]
* [[Definition:Excess of loss]]
{{Div col end}}

Definition:Excess casualty insurance - Revision history

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