Excess Liability Insurance

Overview

Excess liability insurance provides an additional layer of liability coverage that sits above one or more underlying (primary) policies. When a claim exhausts the limits of the underlying policy, the excess policy responds to cover the remaining damages up to its own limit. Excess liability is often confused with umbrella liability, but there are important differences in how the two coverages function.

How It Works

An excess liability policy is designed to follow form — meaning it adopts the same terms, conditions, definitions, and exclusions as the underlying policy it sits above. It does not broaden coverage; it simply extends the available limits.

For example, if a contractor has a $1,000,000 general liability policy and a $5,000,000 excess liability policy, a covered claim that results in a $3,500,000 judgment would be paid as follows:

• The primary GL policy pays the first $1,000,000
• The excess policy pays the remaining $2,500,000

Key characteristics of excess liability:

• Follow-form: Mirrors the underlying policy's terms — no broader, no narrower
• Specific attachment: Attaches above a named underlying policy with specific limits
• No drop-down: If the underlying policy is exhausted by prior claims or does not cover a particular loss, the excess policy generally does not drop down to fill the gap
• Layered structure: Multiple excess policies can be stacked (first excess, second excess, etc.) to build very high total limits

This contrasts with umbrella liability, which may broaden coverage beyond the underlying policy and may drop down to cover claims that the underlying policy excludes.

Compliance Relevance

Excess liability is common in COI compliance, particularly for high-risk contracts:

• High-limit requirements: When a contract requires $5M, $10M, or more in liability limits, the vendor typically meets this through a combination of primary coverage and one or more excess layers
• Follow-form verification: Compliance teams should confirm that the excess policy follows the form of the underlying GL, auto, and employers liability policies — otherwise there may be gaps in the excess layer
• Proper attachment: The excess policy should attach directly above the underlying policy limits, with no gap between them
• Schedule review: Reviewing the excess policy's schedule of underlying insurance confirms proper alignment

On a COI, excess liability is shown in the umbrella/excess section. Compliance platforms should verify that combined primary and excess limits meet the contract's total limit requirements.