15.2 Commercial Umbrella and Excess Liability

Three Jobs of a Commercial Umbrella

A commercial umbrella does three distinct things, and the exam tests all three:

1. Excess limits - it sits above the underlying policies (CGL, Business Auto, Employers Liability) and pays after their limits exhaust.
2. Drop-down - if an underlying aggregate is exhausted by other claims, the umbrella drops down to act as primary for covered losses.
3. Broader coverage - it may cover some claims the underlying policy excludes; for those gaps the insured pays a self-insured retention (SIR) before the umbrella responds.

This third job is what separates a true umbrella from a plain excess policy. An excess (or "follow-form") policy only increases limits and follows the underlying terms exactly - same exclusions, no drop-down for coverage gaps. An umbrella is broader than the schedule beneath it.

The Layered Tower

Think of liability limits as a vertical tower. Each layer pays only after the layer below is exhausted.

Worked Loss Example

A covered judgment of $8,500,000 hits a risk with the tower above:

• Primary CGL pays its full $1,000,000
• Umbrella pays the next $5,000,000 (exhausting $1M-$6M)
• First excess pays the remaining $2,500,000 (of its $6M-$16M layer)

The insured pays nothing out of pocket because an SIR applies only to claims not covered by the underlying policy. Here the loss was covered below, so the umbrella attaches at the underlying limit, not at an SIR.

SIR, Drop-Down, and Maintenance of Underlying

The self-insured retention is the umbrella's deductible-like amount that applies to a loss the umbrella covers but the underlying policy does not. A typical SIR is $10,000-$25,000. It is not a deductible on covered-below claims; for those, the underlying policy is the retained amount.

Drop-down occurs in two situations:

• The underlying aggregate has been used up by earlier claims, leaving no primary limit for a new loss - the umbrella drops to primary.
• The umbrella covers a peril the underlying does not (drop-down to fill a gap, subject to the SIR).

The umbrella requires the insured to maintain underlying coverage at scheduled limits. If the insured lets the CGL lapse or buys lower limits than required, the umbrella treats the missing primary as if it were still in place - the insured eats the gap. This "maintenance of underlying insurance" condition is a frequent exam trap.

Schedule of Underlying Insurance

Every commercial umbrella attaches a schedule of underlying insurance listing each required primary policy and its limits. Typical scheduled minimums are:

If the insured carries an employers liability limit of only $100,000 when the umbrella requires $500,000, the umbrella attaches at $500,000 and the insured self-funds the $100,000-$500,000 gap. The schedule is also why an umbrella renewal often forces the insured to raise a sub-limit on the primary - the umbrella will not sit on a thinner base than scheduled.

Quick Answer: The umbrella attaches at the SCHEDULED underlying limit, never at whatever the insured actually bought if it is lower.

Aggregate Erosion and the Per-Occurrence/Aggregate Split

Umbrellas, like the CGL beneath them, carry both per-occurrence and aggregate limits. Multiple claims in a policy year draw down the aggregate. Once the umbrella aggregate is exhausted, no further coverage exists that year regardless of remaining per-occurrence capacity.

Worked Aggregate Example

An umbrella has a $5,000,000 per-occurrence limit and a $5,000,000 aggregate. Three covered occurrences hit the umbrella layer in one year: $3,000,000, $1,500,000, and $2,000,000.

• Occurrence 1 pays $3,000,000 (aggregate remaining $2,000,000)
• Occurrence 2 pays $1,500,000 (aggregate remaining $500,000)
• Occurrence 3 needs $2,000,000 but only $500,000 of aggregate remains

The umbrella pays $500,000 on the third loss; the excess layer above then responds for the portion still within an open layer, and any uncovered remainder falls on the insured. This is why high-frequency operations buy larger aggregates rather than relying on per-occurrence size.

Umbrella vs. Excess vs. Bumbershoot - Exam Distinctions

The terms are not interchangeable, and the exam exploits the confusion:

• Umbrella - excess limits PLUS broader coverage PLUS drop-down; pays gaps over an SIR.
• Excess / follow-form - additional limits ONLY; mirrors the underlying terms and exclusions exactly; no drop-down for coverage gaps.
• Bumbershoot - a marine/ocean umbrella covering hull, P&I, and general liability for shipowners; tested only as a recognition item.

A further trap is the defense cost treatment: over an underlying policy the umbrella usually pays defense in addition to its limit while the underlying responds, but once the umbrella drops down to act as primary, defense may erode the limit. Read whether the umbrella is functioning as true excess or as drop-down primary before allocating defense.

Exam Tip: Personal umbrellas and commercial umbrellas share the drop-down/SIR logic, but commercial umbrellas always reference a SCHEDULE of underlying business policies - never assume Homeowners-style automatic underlying.