15.2 Commercial Umbrella and Excess Liability

What an umbrella does

A commercial umbrella sits above a business's primary liability policies (commercial general liability, business auto, and employers' liability) to provide high catastrophic limits. It performs two jobs at once: it pays excess over the underlying limits, and it can drop down to cover a few claims the underlying policies exclude. The exam draws a sharp line between a true umbrella (which can broaden coverage and drop down) and a pure excess liability policy (which only adds limit and follows the underlying form exactly).

Three ways an umbrella responds

1. Excess over underlying — when a claim is covered by both the umbrella and the underlying CGL, the umbrella pays only after the underlying limit is exhausted.
2. Drop-down for excluded claims — when a loss is covered by the umbrella but not the underlying policy, the umbrella pays after the insured satisfies the self-insured retention (SIR), which functions like a deductible for coverage gaps.
3. Drop-down after aggregate erosion — if the underlying aggregate has been used up by earlier claims, the umbrella can step into the primary position for a later covered loss.

The SIR (commonly $10,000 or $25,000) applies only to the drop-down situations — never when the umbrella is simply paying excess over a still-intact underlying limit.

Required underlying limits

Umbrellas demand scheduled underlying limits so there is no gap between the primary policy and the umbrella attachment point. Typical minimums:

If the insured lets an underlying policy lapse or carries less than the schedule requires, the umbrella treats the required limit as if it were in place — meaning the insured self-insures the difference. This 'self-insured gap' is a favorite exam trap.

Worked attachment numeric

A contractor carries a $1,000,000 CGL each-occurrence limit and a $5,000,000 commercial umbrella with a $10,000 SIR. Two scenarios:

• Scenario 1 (covered by both): A $3,000,000 covered judgment. The CGL pays its $1,000,000; the umbrella pays the remaining $2,000,000. No SIR applies because the umbrella is excess over an intact underlying limit.
• Scenario 2 (umbrella-only coverage): A $400,000 claim excluded by the CGL but covered by the umbrella. The insured pays the $10,000 SIR, and the umbrella pays $390,000.

Maximum recovery from the umbrella in either case cannot exceed its $5,000,000 limit, and the umbrella never pays the underlying limit on the insured's behalf in Scenario 1.

Excess liability vs. umbrella — the testable distinction

• A following-form excess policy adopts the exact terms of the underlying CGL. If the CGL excludes a loss, the excess excludes it too; there is no drop-down and no SIR.
• A stand-alone (non-following-form) excess has its own terms and may be broader or narrower than the underlying form.
• A true umbrella is broader than the underlying policies and can drop down via the SIR.

When a question describes a policy that 'only adds limits and follows the primary,' it is excess, not umbrella; when it 'fills gaps subject to a retention,' it is an umbrella.

Common umbrella exclusions and the maintenance condition

Even though the umbrella is broad, it carries its own exclusions: workers' compensation and employers' liability statutory benefits, owned-aircraft and watercraft beyond stated lengths, professional liability, pollution beyond limited carve-backs, employment practices, and expected or intended injury.

The umbrella also imposes a maintenance-of-underlying-insurance condition: the insured must keep the scheduled underlying coverage in force with the same terms. A breach of this condition does not void the umbrella but reverts the insured to the self-insured-gap rule, so the umbrella attaches as though the required underlying limit were collectible. This is why producers audit underlying renewals every year.

Aggregate erosion and stacking

The umbrella's drop-down for aggregate erosion is a frequent exam topic. Assume a CGL with a $2,000,000 general aggregate. Two earlier claims pay $1,200,000 and $800,000, exhausting the aggregate mid-year. A new $500,000 covered claim arrives. The CGL is tapped out, so the umbrella drops down and pays the $500,000 from dollar one (subject to its SIR for the now-uncovered layer).

Note the umbrella's limit can be written as a single occurrence/aggregate or as a per-project structure; you cannot 'stack' the same umbrella limit across multiple policy years for one occurrence. Each occurrence is governed by the limit in force when the loss takes place under the policy's trigger.

Self-Insured Retention and the Drop-Down Mechanics

When an umbrella covers a loss that the underlying policy does not (a gap), the insured must first satisfy a self-insured retention (SIR) — a deductible-like amount the insured pays before the umbrella responds. This differs from the situation where underlying coverage exists: there the umbrella simply sits excess above the underlying limit with no SIR.

The exam tests drop-down: an umbrella may drop down to act as primary (after the SIR) when the underlying policy does not apply, but it will not drop down merely because the insured failed to maintain the required underlying limits — in that case the umbrella pays as if the underlying limits were still in force, and the insured absorbs the difference. Recognizing the maintenance condition's consequence is a frequent multi-step umbrella question.