Glossary

Excess liability

Liability coverage that pays only after the limits of underlying policies are used up, adding limit above them without necessarily broadening the terms.

Also called: excess liability insurance, excess policy, excess layer, excess coverage

Excess liability is a layer of limit stacked on one or more underlying liability policies. It pays only after the underlying limit has been exhausted by covered payments, and then continues up to its own limit. The point where it starts paying is the attachment point.

Most excess policies are written follow form: they adopt the underlying policy's terms and exclusions and add limit and nothing else. An umbrella can be broader. It may cover claims the underlying policy does not, and may drop down when an underlying aggregate is used up, subject to a self-insured retention. People use the two words loosely, so read the form, not the label.

Say a contractor carries a $1 million primary CGL and a $4 million excess policy that follows form (a hypothetical). A $3.5 million verdict leaves the primary paying $1 million and the excess paying $2.5 million. If the primary excludes the claim, the excess excludes it too.

Watch the exhaustion wording. Some excess policies require the underlying limit to be paid by the underlying insurer itself, which complicates a settlement that closes a gap with the insured's own money. Confirm that the underlying limits listed in the excess policy match what you actually carry.

umbrella vs excess liability makes the comparison in depth, and the How much umbrella coverage do I need? sizes the total.

Last reviewed October 10, 2026

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Related terms

Umbrella policy A liability policy that adds limits above underlying general liability, auto and employers' liability policies and may cover some claims they do not. Following form An excess or umbrella policy that adopts the terms, conditions and exclusions of the policy beneath it, except where its own wording says otherwise. Attachment point The loss amount at which an excess, umbrella or reinsurance layer starts paying, normally the top of the underlying limits or retention beneath it. Self-insured retention (SIR) The amount of a loss the insured must pay itself, often including defense costs, before the insurer's liability policy begins to pay. Per-occurrence limit The most a liability policy will pay for all damages arising from a single occurrence, however many people are hurt or claims are made.

Related guides

Assault and battery exclusions What an assault and battery exclusion or sublimit removes from a liability policy, which businesses get one, and how to negotiate, price and plan around it. Commercial umbrella insurance How a commercial umbrella adds liability limits above your CGL, auto and employers' liability, when it drops down, what it excludes, and how to size it. Coverage litigation and declaratory judgment actions: when you and your insurer end up in court How insurers and policyholders sue over coverage, what a declaratory judgment action decides, why courts often wait, and what to do if your insurer files one. Employees driving their own cars for work: who is liable? When an employee crashes a personal car on a work errand, driver and employer can both be liable. Whose insurance pays first, the gaps and a policy to adopt. How much liability insurance does a business need? Most small businesses start at $1 million per occurrence and $2 million aggregate. What pushes limits higher, when an umbrella fits, and a worked example. The largest commercial liability insurers (2025) The 25 largest U.S. writers of NAIC's other liability line - general, umbrella, professional, D&O, cyber and more - by 2025 direct premiums written.

Related insurers

Allianz Commercial Allianz's commercial arm (formerly AGCS, absorbing Fireman's Fund); large corporate property, casualty, marine, aviation and specialty cover through brokers. Allied World Fairfax-controlled Bermuda specialty insurer writing excess casualty, D&O, healthcare, environmental and property for midsize and large U.S. accounts. Arch Insurance U.S. arm of Bermuda-based Arch Capital; specialty, E&S and (since buying Allianz's book in 2024) middle market P&C through brokers, MGAs and programs. Aspen Insurance Bermuda specialty insurer and reinsurer owned by Apollo funds from 2019 and by Sompo since February 2026; known for excess casualty, professional lines and E&S. AXA XL AXA's commercial and specialty division, built on XL Group (bought 2018); writes liability, excess, property and specialty lines for mid-size and large firms. AXIS Capital Bermuda-based specialty insurer selling E&S casualty and property, professional, management, cyber and construction lines to mid-size and large U.S. firms.

Related tools

How much umbrella coverage do I need? Score the exposures that drive large liability claims, apply any contract-required limit and check your primary limits to get a starting umbrella range.

Related en español

¿Cuánto seguro de responsabilidad civil necesita su negocio? Casi todo negocio pequeño empieza con $1 millón por ocurrencia y $2 millones en el agregado. Qué sube los límites, cuándo conviene un paraguas y un ejemplo. Empleados que manejan su propio auto por trabajo: ¿quién responde? Si un empleado choca su auto personal en un mandado de trabajo, él y el empleador pueden responder. Qué seguro paga primero, los huecos y qué política adoptar. Seguro paraguas comercial (commercial umbrella) Cómo un paraguas comercial suma límites sobre su CGL, auto y responsabilidad patronal, cuándo baja a primario, qué excluye y cómo dimensionarlo.