15.2 Commercial Umbrella and Excess Liability
Key Takeaways
- An umbrella sits above scheduled underlying policies (CGL, auto, employers liability), providing higher limits AND broader drop-down coverage.
- True excess (following-form) only raises limits and follows the underlying terms exactly; it does not drop down for new exposures.
- The self-insured retention (SIR) is the deductible an umbrella applies to losses not covered by any underlying policy.
- Umbrellas require the insured to maintain scheduled underlying limits; failing to do so makes the insured self-insure the gap, not the umbrella.
- Defense costs under an umbrella are usually outside the limit until the umbrella drops down, then they may erode the SIR.
Umbrella vs excess - the core distinction
Both a commercial umbrella and an excess liability policy provide limits above a primary policy, but they are not the same product.
| Feature | Commercial Umbrella | Excess (following-form) |
|---|---|---|
| Raises underlying limits | Yes | Yes |
| Broadens coverage (drop-down) | Yes, for gaps not covered below | No |
| Self-insured retention (SIR) | Yes, for non-underlying losses | Rare |
| Own coverage terms | Yes (its own insuring agreement) | No - follows the primary form |
An umbrella does two jobs: (1) it provides additional limits over the scheduled underlying policies, and (2) it drops down to provide coverage for claims the underlying policy excludes, after the insured satisfies a self-insured retention (SIR). A pure following-form excess policy only does job one - it raises the limit and adopts the underlying policy's exact terms, exclusions, and conditions.
Required underlying limits and maintenance
An umbrella is sold above a schedule of underlying insurance - commonly CGL, business auto, and employers liability. The umbrella states the limits the insured must maintain, e.g.:
| Underlying policy | Required limit |
|---|---|
| CGL | $1,000,000 per occurrence / $2,000,000 aggregate |
| Business Auto | $1,000,000 CSL |
| Employers Liability | $500,000 |
If the insured lets a scheduled underlying limit lapse or buys less than required, the umbrella still attaches as if the required underlying limit were in place - the insured, not the insurer, eats the gap. This is the maintenance condition and it is a frequent exam trap.
Attachment point worked example
A contractor has a $1,000,000 CGL and a $5,000,000 umbrella. A covered judgment is $3,500,000.
- CGL pays its limit: $1,000,000
- Umbrella pays the excess: $3,500,000 - $1,000,000 = $2,500,000
- Umbrella limit remaining: $5,000,000 - $2,500,000 = $2,500,000
Now suppose the loss is a type excluded by the CGL but covered by the umbrella (a drop-down), with a $10,000 SIR. On a $3,500,000 loss the umbrella pays from the first dollar above the SIR: $3,500,000 - $10,000 = $3,490,000 (within the $5,000,000 limit). The SIR functions like a deductible the insured retains because no underlying policy responds.
An insured carries a $1,000,000 CGL but the umbrella's schedule requires a $1,000,000 underlying limit. The insured non-renews the CGL and carries no primary at all. A $2,000,000 covered judgment occurs. How does the umbrella respond?
Self-insured retention and defense
The SIR applies only to losses that no underlying policy covers. When an underlying policy does respond, there is no SIR - the umbrella simply sits on top after the underlying limit is exhausted. When the umbrella drops down to fill a gap, the insured first pays the SIR, then the umbrella responds.
Defense cost treatment is a distinguishing feature:
- While an underlying policy is defending, the umbrella usually is not providing a defense and its limit is unaffected.
- When the umbrella drops down (no underlying defense), the umbrella provides the defense; depending on the form, defense may be in addition to the limit or may erode the SIR.
Common umbrella exclusions
Even a broad umbrella excludes certain exposures, pushing them to specialty markets:
- Workers' compensation benefits (use WC; the umbrella sits over employers liability only)
- Professional liability / E&O (needs separate professional policy)
- Owned-aircraft and watercraft beyond stated limits
- Pollution (largely excluded; needs environmental coverage)
- Care, custody, or control / damage to the insured's own property
The takeaway: the umbrella broadens general liability exposures, but it is not a substitute for professional liability, pollution, or workers' compensation coverage.
How limits stack and the loss travels upward
Visualize a covered liability loss as a column that fills from the bottom. The primary policy (CGL) pays first up to its per-occurrence limit. Once exhausted, the loss moves into the umbrella layer, which pays up to its limit. If a buyer needs even more capacity, an excess layer can sit above the umbrella, following the umbrella's terms. A $25,000,000 program might be built as a $1,000,000 CGL primary, a $5,000,000 umbrella, and two $10,000,000 following-form excess layers stacked on top.
Note the aggregate behavior. The CGL aggregate can be exhausted by several smaller claims during the year; when that happens, the umbrella may drop down to act as primary for later claims (subject to the SIR) because there is no underlying limit left. This is a different drop-down than the coverage-gap drop-down, and the exam may test both.
Personal umbrella contrast
Do not confuse the commercial umbrella with the personal umbrella, which sits over a personal auto and homeowners policy. The mechanics rhyme - higher limits, drop-down with a retention for non-underlying claims, required underlying limits - but the personal form covers personal exposures (auto, residence, libel/slander) rather than business operations. A question that mentions a business auto, CGL, or employers liability schedule is pointing to the commercial umbrella.
Distinguishing the two products on the exam
When a question asks which form 'broadens coverage and can drop down,' the answer is the umbrella. When it asks which form 'merely increases limits and adopts the underlying terms with no new coverage,' the answer is following-form excess. The SIR appears only on the umbrella, and only for losses no underlying policy covers.