15.2 Commercial Umbrella and Excess Liability
Key Takeaways
- An umbrella provides excess limits above underlying policies AND can drop down to cover certain claims the underlying excludes, subject to a self-insured retention (SIR).
- An excess (follow-form) policy adds only additional limits above the underlying and covers nothing the underlying excludes.
- The self-insured retention is the amount the insured pays out of pocket when the umbrella drops down to cover a claim with no underlying coverage; it functions differently from a deductible.
- Umbrellas require the insured to maintain stated minimum underlying limits (e.g., CGL $1M/$2M, auto $1M CSL, employers liability $500K); failing to maintain them makes the insured pay as if the underlying were intact.
- Umbrella limits commonly run $1M to $25M+ at relatively low cost because the underlying policies pay first, making large umbrella claims infrequent.
Umbrella vs. Excess — The Core Distinction
Both umbrella and excess liability policies sit above the primary (underlying) coverage and add limits. The exam-critical difference is breadth of coverage.
| Feature | Umbrella | Excess (Follow-Form) |
|---|---|---|
| Coverage scope | May be broader than underlying | Follows the underlying exactly |
| Drop-down | Yes — covers some claims the underlying excludes | No — limits only |
| Own policy language | Has its own terms and conditions | Adopts the underlying terms |
| SIR | Applies when it drops down | Usually none |
| Premium | Slightly higher | Slightly lower |
Quick Answer: An umbrella equals extra limits plus drop-down for some excluded claims (above an SIR). An excess policy equals extra limits only, mirroring the underlying.
The Three Functions of a Commercial Umbrella
1. Excess Over Underlying Limits
When an underlying limit is exhausted, the umbrella pays above it. Example: the CGL limit is $1,000,000, the umbrella is $5,000,000, and a covered judgment is $3,500,000. The CGL pays $1,000,000 and the umbrella pays the remaining $2,500,000.
2. Drop-Down Coverage
When a claim is covered by the umbrella but not by the underlying policy, the umbrella drops down to respond — but only after the insured pays the self-insured retention (SIR). Example: the umbrella covers worldwide liability the CGL excludes. With a $10,000 SIR and a $250,000 covered claim, the insured pays $10,000 and the umbrella pays $240,000.
3. Restoring Reduced Aggregates
When the underlying aggregate has been partly eroded by earlier claims, the umbrella can sit over the reduced limit so the insured is not left with a coverage gap mid-term.
The Self-Insured Retention vs. a Deductible
The SIR is the insured's retained amount that applies only when the umbrella drops down — that is, when there is no underlying coverage for the claim. Two distinctions matter:
- A deductible is subtracted from a covered loss and erodes the limit in some forms; the insurer pays the claimant and seeks the deductible back from the insured.
- An SIR is paid by the insured directly before the umbrella's coverage attaches. The insured, not the insurer, handles the first dollars (and sometimes the defense) within the SIR.
When the umbrella is acting as true excess (the underlying responds), no SIR applies — the underlying limits attach directly to the umbrella.
Required Underlying Limits — The Maintenance Trap
Every umbrella schedules minimum required underlying limits. Typical requirements:
| Underlying Coverage | Common Required Limit |
|---|---|
| CGL | $1,000,000 occurrence / $2,000,000 aggregate |
| Business Auto | $1,000,000 combined single limit |
| Employers Liability | $500,000 each accident |
Trap: If the insured fails to maintain the required underlying limit (e.g., buys only $500,000 of CGL when $1,000,000 is required), the umbrella does not drop down to fill the missing $500,000. The umbrella pays as if the full required underlying limit were in place, and the insured absorbs the difference. This protects the umbrella insurer from being pulled down into the primary layer.
Worked Layering Example
A $2,000,000 covered judgment, CGL required and maintained at $1,000,000 per occurrence, umbrella $5,000,000:
- CGL pays $1,000,000
- Umbrella pays $1,000,000 (its limits attach immediately above the underlying — no SIR because the underlying responds)
- Insured out of pocket: $0 (other than premium)
Now change the facts: the insured carried only $600,000 CGL. The CGL pays $600,000, the umbrella still attaches at the required $1,000,000, so it pays $1,000,000 above that point — and the insured personally absorbs the $400,000 gap between $600,000 and $1,000,000.
How an Umbrella Works
A commercial umbrella provides excess limits over scheduled underlying policies (CGL, business auto, employers liability) and can drop down to provide broader primary coverage for some claims the underlying excludes - subject to a self-insured retention (SIR). It is the high-limit catastrophe layer that protects a business from a judgment that exhausts primary limits.
Three Functions of the Umbrella
| Function | What It Does |
|---|---|
| Excess | Pays above the underlying limit once it is exhausted |
| Broadening (drop-down) | Provides coverage the underlying lacks, after the SIR |
| Reinstatement of aggregates | Effectively restores limits the underlying aggregate eroded |
The Self-Insured Retention
When the umbrella drops down to cover a loss the underlying does not insure, the insured first pays a self-insured retention (SIR) - an out-of-pocket amount functioning like a deductible for those broadening claims. The SIR does not apply to losses also covered by the underlying (the underlying limit applies there). Distinguishing SIR (umbrella drop-down) from deductible (primary policy) is a frequent exam point.
Required Underlying Limits and "Following Form"
The umbrella requires the insured to maintain stated underlying limits (for example, $1M CGL each occurrence, $1M auto CSL, $1M/$1M/$1M employers liability). If the insured lets underlying coverage lapse or carries less, the umbrella treats the underlying as still in place and the insured self-insures the gap.
Most umbrellas are "following form" for excess (mirroring the underlying terms) but apply their own broader insuring agreement plus a list of umbrella exclusions for drop-down claims. A candidate should know that a personal umbrella functions the same way over a homeowners/PAP base, and that umbrellas typically exclude workers' comp, professional liability, and intentional acts.
A claim is covered by the commercial umbrella but excluded by the underlying CGL. The umbrella has a $25,000 self-insured retention and the covered claim is $300,000. How much does the umbrella pay?
An umbrella requires $1,000,000 of underlying CGL but the insured carries only $700,000. A $2,000,000 covered judgment occurs. How much must the insured absorb out of pocket due to failure to maintain underlying limits?