15.2 Commercial Umbrella and Excess Liability
Key Takeaways
- An umbrella provides excess limits AND can drop down to cover claims the underlying excludes, subject to a self-insured retention (SIR); an excess policy is follow-form and adds only limits.
- A common SIR is $10,000; it applies only when the umbrella drops down for a coverage gap, not when underlying limits are merely exhausted.
- Umbrellas require the insured to maintain scheduled underlying limits (e.g., $1M/$2M CGL).
- If the insured fails to maintain required underlying limits, the umbrella responds as if those limits were still in place, and the insured self-insures the shortfall.
- An SIR is not a deductible: it applies only on drop-down and the insured handles losses within it.
Umbrella vs. Excess — The Core Distinction
Both umbrella and excess liability policies sit above primary (underlying) coverage, but they behave differently and the exam tests the difference relentlessly.
- An umbrella does three jobs: (1) it provides excess limits above underlying policies, (2) it can drop down to pay claims the underlying excludes but the umbrella covers (subject to a self-insured retention), and (3) it broadens coverage.
- An excess policy is follow-form: it provides only additional limits above the underlying and covers nothing the underlying excludes. If the primary denies the claim, a true follow-form excess denies it too.
Mnemonic: an umbrella opens up to cover more; an excess policy is just a taller stack of the same coverage.
Commercial umbrellas commonly attach above three underlying policies at once: the Commercial General Liability (CGL), the Business Auto policy, and the Employers Liability portion of the workers compensation policy. The umbrella does not sit above workers compensation benefits (those are statutory and unlimited), only above the Employers Liability ("Part Two") side.
Limits are sold in round increments — $1,000,000, $2,000,000, $5,000,000, on up to $25,000,000 or more for large accounts. Because the umbrella attaches high, its premium per million of limit is far cheaper than primary coverage, which is why even small businesses buy one to satisfy lease or contract requirements.
The Self-Insured Retention (SIR) and Drop-Down
When an umbrella drops down to cover a claim the underlying policy excludes (so there is no primary insurance to exhaust first), the insured must pay a Self-Insured Retention (SIR) before the umbrella responds. A common SIR is $10,000.
The SIR is not the same as a deductible:
| Feature | Self-Insured Retention | Deductible |
|---|---|---|
| When it applies | Only when the umbrella drops down (no underlying coverage) | On the underlying policy regardless |
| Defense | Insured handles within SIR | Insurer typically defends |
| Affects limit | Sits below the umbrella limit | Reduces the loss payment |
Drop-down also occurs when underlying limits are exhausted by other claims — the umbrella then becomes the primary payer for new losses, but in that scenario the insured does NOT pay an SIR (the SIR only applies to coverage gaps, not exhaustion).
The SIR functions like a mini deductible the insured retains and administers itself: the insured investigates, defends, and pays losses inside the SIR, and the umbrella's duty to defend and indemnify begins only after the SIR is satisfied by an actual payment. By contrast, when the umbrella sits over a fully covered claim, defense is usually provided in addition to the umbrella limit, just like the CGL.
Another subtle point: the umbrella's coverage grant is broader than the underlying. It may cover worldwide bodily injury and property damage, blanket contractual liability, and some personal/advertising-injury offenses the CGL narrows. Where the umbrella is broader and the underlying is silent or excludes, the SIR-plus-drop-down mechanism is exactly how that extra coverage is delivered.
Required Underlying Limits (The "Schedule of Underlying")
Every umbrella conditions its coverage on the insured maintaining stated underlying limits. A typical schedule:
- CGL: $1,000,000 per occurrence / $2,000,000 aggregate
- Commercial Auto: $1,000,000 combined single limit
- Employers Liability: $500,000 / $500,000 / $500,000
If the insured fails to maintain these limits, the umbrella does not lapse — instead the umbrella responds as if the required underlying limit were still in place. The insured effectively self-insures the shortfall.
The umbrella also requires the insured to keep the underlying coverage in force and collectible. If a primary insurer becomes insolvent, most umbrellas state that the umbrella will not drop down to fill the bankrupt insurer's layer — the insured is treated as if that underlying limit were still available. This is a heavily tested gotcha: an insolvent primary does not convert the umbrella into a primary policy.
Finally, the umbrella usually contains its own aggregate limit separate from the underlying aggregates, plus a list of exclusions (e.g., workers comp benefits, pollution, professional services, owned-aircraft) that the insured cannot assume are covered just because the umbrella is "broad." The exam rewards reading the umbrella's exclusions independently of the CGL's.
Worked Example: The Self-Insurance Gap
An umbrella requires a $1,000,000 underlying CGL limit, but the insured lets the CGL drop to a $500,000 limit to save premium. A covered $3,000,000 judgment is entered.
- The umbrella treats the underlying as if it were the required $1,000,000, not the actual $500,000.
- The CGL pays its actual limit: $500,000.
- The umbrella pays above the required $1,000,000 attachment point: $3,000,000 - $1,000,000 = $2,000,000.
- The $500,000 gap between actual ($500,000) and required ($1,000,000) underlying is borne by the insured.
Total: insurer pays $500,000 (CGL) + $2,000,000 (umbrella) = $2,500,000; the insured pays the $500,000 gap out of pocket.
Contrast a clean scenario: if the insured had maintained the full $1,000,000 CGL, the CGL pays $1,000,000, the umbrella pays the next $2,000,000, and the insured pays nothing. The only variable that created the $500,000 out-of-pocket exposure was the failure to keep the underlying limit at the level the umbrella's Schedule of Underlying required. This is why agents audit underlying limits at every renewal — a primary-policy downgrade silently shifts risk back to the insured.
An insured's CGL excludes a particular advertising-injury offense, but the commercial umbrella covers it. A covered claim of that type arises. How does the umbrella respond?
An umbrella requires a $1,000,000 underlying CGL limit, but the insured carries only $500,000. A $3,000,000 covered judgment occurs. How much must the insured pay out of pocket due to the unmaintained underlying limit?