15.2 Commercial Umbrella and Excess Liability
Key Takeaways
- An umbrella sits above scheduled underlying limits, provides drop-down coverage broader than the underlying, and fills gaps subject to a self-insured retention (SIR)
- Excess liability follows form and only increases limits; it does NOT broaden coverage or drop down to new perils
- The umbrella requires the insured to maintain scheduled underlying limits; failure makes the insured the de facto self-insurer of that layer
- The SIR applies to gap losses (covered by umbrella but not underlying); for losses covered underlying, the underlying limit must exhaust first
Three layers of liability
Large commercial accounts build a tower of liability limits. The exam tests three distinct functions:
- Primary / underlying - the first-dollar coverage (CGL, Commercial Auto, Employers Liability) subject to its own per-occurrence and aggregate limits.
- Umbrella - sits above the scheduled underlying coverages, provides additional limits, and can be broader than the underlying.
- Excess - increases limits only.
The critical distinction: a commercial umbrella does three jobs - (a) adds limits over the underlying, (b) drops down to provide coverage when an underlying aggregate is exhausted, and (c) provides broader coverage for losses the underlying excludes (subject to a self-insured retention). Excess liability does only job (a): it follows the underlying form and simply stacks limit on top.
Self-insured retention (SIR)
When the umbrella covers a loss that the underlying policy does not cover (a gap), the insured first pays a self-insured retention (SIR) - often $10,000 or $25,000 - before the umbrella responds. The SIR is the insured's deductible-equivalent for gap losses. For losses that ARE covered by the underlying, no SIR applies; instead the underlying limit must be exhausted first.
Maintenance of underlying limits
The umbrella names a schedule of underlying insurance with required limits (for example, CGL at $1,000,000 occurrence / $2,000,000 aggregate; Auto at $1,000,000; Employers Liability at $1,000,000). The maintenance-of-underlying-insurance condition requires the insured to keep those limits in force.
Trap: if the insured lets underlying coverage lapse or buys lower limits, the umbrella still responds only as if the required underlying were in place. The insured becomes the self-insurer of the difference. The umbrella does NOT drop down to pay the underlying's job just because the insured underbought.
Drop-down: two scenarios
- Aggregate exhausted by prior claims: if the $2,000,000 CGL aggregate is used up by earlier losses, the umbrella drops down and acts as primary for a new covered occurrence.
- Coverage gap (excluded underlying): if the loss is excluded by the CGL but covered by the umbrella, the insured pays the SIR, then the umbrella pays.
| Feature | Umbrella | Excess (follow-form) |
|---|---|---|
| Adds limits | Yes | Yes |
| Broader than underlying | Yes (with SIR) | No |
| Drops down when aggregate exhausted | Yes | Sometimes |
| Covers gaps the underlying excludes | Yes | No |
Worked tower example
A contractor builds this tower:
- Primary CGL: $1,000,000 per occurrence
- Umbrella: $5,000,000 per occurrence, $10,000 SIR
- Excess (follow-form): $5,000,000 over the umbrella
Scenario A - covered by both layers. A judgment of $4,000,000 arises from a covered occurrence. The CGL pays its $1,000,000 limit; the umbrella pays the remaining $3,000,000. No SIR applies because the loss is covered by the underlying. The excess layer is untouched.
Scenario B - gap loss. A $2,000,000 loss is covered by the umbrella but excluded by the CGL. There is no underlying limit to exhaust, so the insured pays the $10,000 SIR, and the umbrella pays $1,990,000.
Scenario C - exhausted aggregate. Earlier claims used the entire CGL aggregate. A new $3,000,000 covered occurrence hits. The umbrella drops down and pays as primary, exhausting toward its $5,000,000 limit; no SIR applies because the loss type is a covered underlying peril.
Exam instinct: read whether the loss is (1) covered by the underlying - then exhaust the underlying limit; or (2) a gap - then apply the SIR.
A loss is covered by the commercial umbrella but specifically excluded under the insured's CGL. The umbrella carries a $10,000 self-insured retention. How does payment work?
An insured was required to maintain $1,000,000 CGL underlying but bought only $500,000. A $2,000,000 covered occurrence happens. How does the umbrella respond?
Self-Insured Retentions and the Drop-Down Feature
When an umbrella covers a loss that the underlying policy does not (an exposure the primary excluded but the umbrella does not), the umbrella drops down to act as primary, but only after the insured satisfies a self-insured retention (SIR), commonly $10,000 or $25,000. The SIR functions like a deductible the insured pays before the umbrella responds for these non-concurrent claims.
| Term | Meaning |
|---|---|
| Umbrella | Excess over underlying plus broader coverage that can drop down (subject to SIR) |
| Excess (follow-form) | Adds limit only; exactly mirrors the underlying terms, no drop-down |
| SIR | Insured-retained amount before the umbrella pays a dropped-down claim |
| Maintenance of underlying | Insured must keep required primary limits in force or self-insure the gap |
Worked point: with required underlying CGL of $1,000,000 and a $5,000,000 umbrella, a covered $1,000,000 ground-up CGL loss is paid entirely by the primary. A $4,000,000 loss exhausts the primary's $1,000,000 and the umbrella pays the remaining $3,000,000. If the insured carried less than the required underlying limit, the insured - not the umbrella - absorbs the shortfall.
Concurrency and Following Form vs. Self-Contained Umbrellas
Umbrellas differ in how closely they track the underlying policies, which the exam tests.
| Umbrella type | Behavior |
|---|---|
| Following-form | Adopts the exact terms of the underlying policy - limit only |
| Self-contained (stand-alone) | Has its own terms; may be broader or narrower than underlying |
| Umbrella (broadest) | Excess plus drop-down for non-concurrent exposures (subject to SIR) |
Exam Trap: A pure excess (following-form) policy adds only limit and cannot drop down - if the underlying excludes a loss, the follow-form excess also excludes it. Only a true umbrella drops down to act as primary for covered losses the underlying does not reach, and then only after the insured pays the self-insured retention.