Commercial Umbrella and Excess Liability

Why Umbrellas Exist

A commercial umbrella provides high limits of liability above the insured's primary policies (CGL, commercial auto, employers liability) and can also drop down to cover claims the primary excludes. It is the workhorse of large-account liability and a heavily tested topic because students confuse it with true excess coverage.

Three layers operate together:

• Primary policies - first dollars, e.g., $1,000,000 CGL occurrence limit
• Umbrella - sits above the primary and broadens coverage
• Self-insured retention (SIR) - the deductible-like amount the insured pays on claims the umbrella covers but the primary does not

Umbrella vs. Excess - The Key Distinction

This comparison appears on nearly every P&C exam:

A follow-form excess policy copies the underlying policy's terms exactly - if the primary excludes a loss, the excess excludes it too. A true umbrella is broader: when a covered claim falls outside the primary, the umbrella drops down and pays after the insured satisfies the SIR.

Self-Insured Retention in Action

The SIR is the heart of umbrella drop-down. It applies only to losses the umbrella covers but the underlying policy does NOT.

Worked example. A business carries a $1,000,000 CGL and a $5,000,000 umbrella with a $25,000 SIR.

1. Covered by both: A $1,400,000 covered judgment. CGL pays its $1,000,000 limit; the umbrella pays the excess $400,000. No SIR applies because the primary responded.
2. Covered by umbrella only (drop-down): A $300,000 claim the CGL excludes but the umbrella covers. The insured pays the $25,000 SIR, and the umbrella pays the remaining $275,000.

Note: when the primary policy responds, the umbrella attaches at the primary's exhausted limit, not at the SIR.

Maintenance of Underlying Insurance

Umbrella policies require the insured to keep stated underlying limits in force (the schedule of underlying insurance). If the insured lets a primary lapse or reduces its limit, the umbrella treats the required underlying limit as if it were still collectible - the insured, not the umbrella, absorbs the gap.

Example. The umbrella requires a $1,000,000 underlying CGL. The insured nonrenews the CGL. A $2,000,000 covered loss occurs. The umbrella responds only for amounts above $1,000,000, paying $1,000,000; the insured personally absorbs the first $1,000,000 as if the primary were still in place. This penalizes failure to maintain underlying coverage.

Common Exam Traps

• Aggregate erosion: Once the CGL general aggregate is exhausted by earlier claims, the next claim has no primary to pay. The umbrella then drops down subject to the SIR, not at the full underlying limit.
• Defense costs: Umbrellas usually pay defense for drop-down claims but may share or sit silent when the primary is defending.
• Auto exposure: Personal injury from a covered auto can reach the umbrella once the commercial auto limit is exhausted - umbrellas commonly sit over CGL, auto, AND employers liability.

Finally, an umbrella is NOT a substitute for primary coverage; it assumes the schedule of underlying insurance stays in force.

What Umbrellas Cover and Exclude

A true umbrella broadens the primary in two ways. First, it gives higher limits over scheduled underlying policies. Second, it provides broader coverage for liability that the primary excludes but the umbrella insures - the drop-down feature - after the insured pays the SIR.

Despite the breadth, umbrellas carry their own exclusions, including:

• Workers compensation and statutory benefits (an umbrella sits over employers liability, not the comp benefits themselves)
• Liability assumed under certain contracts beyond defined insured-contract terms
• Pollution, professional services, ERISA, and intentional/expected injury (often by exclusion or limited grant)
• Care, custody, and control of property in many forms

The exam expects you to recognize that an umbrella is high-limit liability protection - it never adds first-party property coverage.

Stacking the Tower - A Full Worked Tower

Large accounts stack multiple layers into a liability tower. Consider a $1,000,000 primary CGL, a $5,000,000 umbrella, and a $10,000,000 follow-form excess layer above the umbrella, all responding to one covered judgment of $14,000,000.

• Primary CGL pays its $1,000,000.
• Umbrella pays the next $5,000,000 (taking the total to $6,000,000).
• Excess layer pays the next $8,000,000 of its $10,000,000 limit (taking the total to $14,000,000).

The insured collects the full $14,000,000 with $2,000,000 of excess limit still unused. Each layer attaches only after the layer beneath it is exhausted. This vertical-exhaustion logic - and identifying which layer pays a given slice - is a favorite exam construct, so practice tracing dollars from the bottom up.

Umbrella limits are written as a single per-occurrence and aggregate amount; unlike the CGL there is usually no separate products or per-location aggregate. When the umbrella aggregate is exhausted, no further coverage exists until renewal, which is why high-hazard accounts buy excess layers above the umbrella rather than relying on the umbrella alone.