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Umbrella vs. Excess Liability: What to Accept on a Subcontractor's COI

By SubCover HQ · Updated Oct 29, 2026 · 3 min read

Your contract requires $2,000,000 per occurrence. The sub's certificate shows $1,000,000 of general liability and a $1,000,000 umbrella. Does that meet the requirement? Often it can, but only if the umbrella or excess policy actually sits over the right coverage and extends to you. Here's how to read that section of the certificate.

What umbrella and excess policies do

Both add limits above a sub's underlying policies, usually general liability, auto liability, and employers' liability. They pay after the underlying limit is used up. The names get used interchangeably, but there's a real difference:

• Excess liability generally follows the terms of the underlying policy ("follow form"). It adds limits but doesn't usually add coverage the underlying policy lacks.
• Umbrella liability adds limits too, and may also cover some claims the underlying policies don't, subject to a self-insured retention. Its terms are its own, so it can be broader in some places and narrower in others.

In practice, every policy is different. The form wording, not the label, decides what's covered.

Where it shows up on the ACORD 25

The "Umbrella Liab / Excess Liab" row shows which type it is, whether it's occurrence or claims-made, the policy number and dates, and the each-occurrence and aggregate limits. Check the ADDL INSD and SUBR WVD columns on this row separately. A "Y" on the general liability line doesn't carry over to the umbrella line.

Can a sub stack limits to meet your requirement?

Many contracts allow it, for example $1M general liability plus a $1M umbrella to meet a $2M requirement. Spell this out in your contract so there's no argument later. When you accept a combination, check that:

• The umbrella sits over the right policies. If you need auto or employers' liability limits too, the umbrella should list them as underlying coverage.
• It extends additional insured status to you. Many contracts require the umbrella to follow form or to name the same additional insureds as the underlying GL. Otherwise you may only have $1M of protection, not $2M.
• It's primary and noncontributory where required. If your contract requires that wording, it should apply to the umbrella as well. See primary and noncontributory explained.
• The dates line up. Umbrella and GL policies often renew on different dates. Track each expiration separately, or one will lapse unnoticed.
• The aggregate isn't shared too thin. An umbrella aggregate is shared across every job the sub works. A busy sub with a $1M umbrella aggregate may have used part of it before your claim.

When to require an umbrella at all

Higher-risk trades often carry higher total limits: roofing, structural steel, crane work, demolition, tree work, and anything involving heights or heavy equipment. Low-risk trades may not need one. Tier your requirements by trade and talk with your broker about what's typical. Our COI requirements by trade pages and the guide to insurance limits to require from subcontractors are good starting points.

Red flags

• An umbrella limit typed in with no policy number or insurer.
• "Excess" coverage that only sits over one policy when your contract requires limits on several.
• No additional insured marking on the umbrella line when your contract requires it.
• Umbrella dates that expired while the GL is still current.
• A claims-made umbrella when the rest of the program is occurrence-based, with no explanation.

What to ask the agent for

Ask for the schedule of underlying insurance, confirmation that the umbrella or excess policy extends additional insured status to the parties your contract names, and the endorsement or policy wording if your contract requires follow-form or primary and noncontributory coverage. Our free COI compliance checker lists gaps like these and drafts the email, or let SubCover HQ read each certificate, flag umbrella gaps, and track every policy date for you.

This guide is general information, not insurance or legal advice. ACORD is a trademark of ACORD Corporation; SubCover HQ is not affiliated with ACORD. Your contracts, insurance professional, and attorney determine what you should require.