15.2 Commercial Umbrella and Excess Liability

Commercial Umbrella and Excess Liability

A Commercial Umbrella sits on top of one or more underlying liability policies (typically the CGL, business auto, and employers liability under workers compensation) and does three jobs: it provides excess limits above the underlying policies, it drops down to provide broader coverage for some claims the underlying excludes (subject to a self-insured retention), and it fills gaps when an underlying aggregate is exhausted. A pure Excess Liability policy, by contrast, only adds limits and follows the underlying terms ('follow form') — it does not broaden coverage or drop down for excluded claims.

The three layers

The Self-Insured Retention (SIR) is the umbrella's signature feature. It applies only when the umbrella covers a loss that the underlying policy does not cover at all (a drop-down). It is not a deductible on covered underlying claims — those flow straight through after the underlying limit is used up.

Required underlying limits

The umbrella demands the insured maintain stated minimum underlying limits (a schedule of underlying insurance). If the insured fails to maintain them, the umbrella treats the gap as if the underlying limit were still in place — the insured self-insures the shortfall.

Worked numeric — a covered claim, underlying maintained:

• CGL each-occurrence limit: $1,000,000
• Umbrella limit: $5,000,000
• Covered judgment: $3,500,000
• CGL pays $1,000,000; umbrella pays the excess $2,500,000

Worked numeric — underlying NOT maintained:

• Required underlying CGL: $1,000,000
• Insured actually carried only $500,000
• Covered judgment: $3,500,000
• CGL pays $500,000; the insured must absorb the $500,000 gap (the difference up to the required $1,000,000); the umbrella then pays only the $2,500,000 excess above the required $1,000,000 attachment point.

The umbrella never punishes itself for the insured's failure to maintain underlying limits — it pays as if the schedule were honored.

Umbrella vs. Excess: The Three Functions

A commercial umbrella does three things, and the exam tests the distinction from a plain excess policy. It (1) provides additional limits above the underlying CGL/auto/employers-liability; (2) drops down to act as primary when an underlying aggregate is exhausted; and (3) provides broader coverage for some claims not covered by the underlying policy, subject to a self-insured retention (SIR). A pure excess policy only adds limits and follows form — it does neither (2)'s drop-down for non-covered claims nor (3)'s broadening.

The SIR and Underlying Limits Requirement

When the umbrella covers a loss the underlying policy excludes, the insured first pays a self-insured retention (e.g., $10,000) — the umbrella's "deductible" for gap claims. The umbrella also requires the insured to maintain stated underlying limits; if the insured lets underlying coverage lapse, the umbrella pays only what it would have paid over the required underlying limit, leaving the insured exposed for the gap. Worked example: $1M underlying exhausted, $4M umbrella, $3M judgment over the underlying — the umbrella pays the $3M.

Concurrency and Following Form

A pure excess "following form" policy adopts the terms, conditions, and exclusions of the underlying policy and simply adds limits — if the underlying excludes a peril, the excess does too. A true umbrella is broader than the underlying schedule, which is why it can drop down for some non-covered claims subject to the SIR. The exam asks you to pick which structure provides new coverage versus only more limit — umbrella broadens, excess follows form.

Drop-down and the SIR in action

The true power of an umbrella appears when it covers a loss the underlying excludes. Suppose the CGL excludes a particular liability but the umbrella does not. There is no underlying limit to exhaust first, so the insured pays the SIR and the umbrella pays the rest up to its limit.

Worked numeric — drop-down over an SIR:

• Umbrella SIR: $10,000
• Covered judgment (excluded by CGL, covered by umbrella): $750,000
• Insured pays SIR: $10,000
• Umbrella pays: $740,000

This is the difference between an umbrella and a follow-form excess policy: a follow-form excess would also exclude the loss because it mirrors the CGL, leaving the insured with the entire $750,000.

Concurrent vs successive and defense

• Defense costs: in the underlying CGL, defense is usually outside the limits. Once the underlying is exhausted, the umbrella typically pays defense for claims it covers, and those costs may be inside or outside the umbrella limit depending on the form — read the declarations.
• Aggregate drop-down: if an underlying aggregate (e.g., the CGL products-completed-operations aggregate) is exhausted by prior claims, the umbrella drops down to act as primary for subsequent covered claims, subject to the SIR.
• Excess vs umbrella exam cue: if the question says the policy 'follows form' and only adds limits, it is excess; if it 'broadens coverage and drops down' it is an umbrella.