15.2 Commercial Umbrella and Excess Liability
Key Takeaways
- An umbrella provides excess limits, can drop down over an SIR for broader claims, and can restore exhausted aggregates.
- Insureds must maintain scheduled underlying limits or the umbrella treats them as if in force, shifting the gap to the insured.
- The Self-Insured Retention sits outside the limit and is not a deductible; the insured may control claims within it.
- A following-form excess policy only adds limits - it never drops down or broadens coverage.
- Umbrellas usually mirror underlying exclusions like pollution, professional liability, and employment practices.
Commercial Umbrella and Excess Liability
A commercial umbrella provides high-limit liability protection that sits above an insured's primary policies. It does three jobs: it provides excess limits over scheduled underlying policies, it may drop down to act as primary for some claims, and it broadens coverage for certain gaps. Excess liability is the simpler cousin - it follows form over the underlying policy and only adds limits.
The three functions of an umbrella
- Excess over underlying: it pays after the Commercial General Liability (CGL), business auto, and employers liability limits are exhausted.
- Drop-down for broader coverage: when a loss is covered by the umbrella but excluded by the underlying policy, the umbrella may pay subject to a Self-Insured Retention (SIR).
- Reinstating aggregates: an umbrella can respond when an underlying aggregate is depleted, effectively restoring protection.
Underlying limits and the SIR
Umbrella carriers require scheduled underlying limits - the minimums the insured must keep in force. A typical schedule:
- CGL: $1,000,000 per occurrence / $2,000,000 general aggregate
- Business Auto: $1,000,000 combined single limit
- Employers Liability: $500,000 each
If the insured fails to maintain these, the umbrella treats coverage as if the required limit were in place - the insured pays the gap.
The Self-Insured Retention (SIR) is the amount the insured pays on a claim the umbrella covers but the underlying does not. It functions like a deductible but, unlike a deductible, the insured (not the insurer) usually controls defense within the SIR layer until it is exhausted.
Table
| Layer | Limit | Who pays |
|---|---|---|
| Underlying CGL | $1,000,000 | Primary insurer |
| SIR (gap claim only) | $10,000 | Insured |
| Umbrella | $5,000,000 | Umbrella insurer |
Worked layering examples
Example A - claim covered by both. A $3,500,000 liability judgment with a $1,000,000 CGL underlying: the CGL pays its $1,000,000, the umbrella pays the remaining $2,500,000. No SIR applies because the underlying responded.
Example B - gap claim. A $400,000 loss covered by the umbrella but excluded by the CGL with a $10,000 SIR: the insured pays the $10,000 SIR, the umbrella pays $390,000.
Common exam traps
- An umbrella is not a standardized ISO form like the CGL; terms vary widely by carrier, so always read the schedule of underlying insurance.
- Umbrellas commonly exclude the same items the underlying excludes (e.g., pollution, professional liability, employment practices) - they do not magically cover everything.
- The SIR is not the same as a deductible: an SIR sits outside the limit and the insured may control the claim within it.
An insured faces a $3,500,000 liability judgment. Their CGL has a $1,000,000 per-occurrence limit and an umbrella provides $5,000,000 excess with no applicable SIR because the CGL covers the claim. How much does the umbrella pay?
Excess vs. umbrella distinction
A pure excess (following-form) policy copies the underlying policy's terms exactly and only adds limits - it never drops down or broadens. An umbrella is broader: it can drop down (subject to SIR) and cover claims the primary excludes. Expect at least one exam question testing this difference.
Aggregate exhaustion and stacking
Umbrella limits are usually occurrence and aggregate limits, like the CGL. If a series of claims erodes the underlying CGL's $2,000,000 general aggregate, the umbrella can step in to continue paying. However, the umbrella's own aggregate is finite, so a severe year of multiple large losses can still exhaust the entire tower. Producers should not assume an umbrella is bottomless - it is a fixed stack of limits.
Why insureds buy umbrellas
Severity, not frequency, drives umbrella purchases. A single catastrophic auto accident, a premises fall, or a products-liability verdict can exceed a $1,000,000 primary limit. The umbrella's high limit (commonly $5,000,000 to $25,000,000) protects the business's balance sheet. Contractual requirements also matter: leases, lender agreements, and large customer contracts frequently mandate that a vendor carry umbrella limits naming the other party as an additional insured.
Defense costs and the umbrella
When the umbrella acts as excess, the underlying insurer handles defense. When the umbrella drops down over an SIR, the umbrella insurer typically assumes the duty to defend once the SIR is satisfied, and those defense costs are usually paid in addition to the limit rather than eroding it - the opposite of most professional liability forms. Read the policy to confirm whether defense is inside or outside the limit.
Maintenance-of-underlying condition
Every umbrella contains a maintenance condition requiring the insured to keep the scheduled underlying coverage in full force. If the primary lapses, is cancelled, or carries lower limits, the umbrella does not fill that hole for free - it responds only as though the required underlying limit existed. This is one of the most heavily tested umbrella concepts, so memorize that the insured bears the gap created by inadequate underlying insurance.
Reduced-underlying-limit example
Assume the schedule requires a $1,000,000 CGL but the insured only renewed at $500,000. A covered $2,500,000 loss occurs. The umbrella pays as if the full $1,000,000 underlying applied, so it pays $2,500,000 - $1,000,000 = $1,500,000. The actual CGL pays only $500,000, leaving the insured to absorb the $500,000 gap between the required and actual underlying limits. The maintenance condition put that gap squarely on the insured.
Buffer layers and the insurance tower
When the umbrella's appetite starts above the primary - say the umbrella attaches at $2,000,000 but the CGL caps at $1,000,000 - insureds insert a buffer layer (a small excess policy) to bridge the gap. Stacking primary, buffer, umbrella, and further excess builds an insurance tower. Each layer attaches only after the layer beneath is exhausted, so producers must verify the attachment points line up with no uninsured space.