Contracts That Require an Umbrella: What the Clause Means and How to Meet It

When a contract requires umbrella or excess coverage, check four things: the limit (per occurrence and aggregate), whether the other party must be an additional insured on the umbrella, whether coverage must be primary and noncontributory, and whether the umbrella must follow form over the underlying policies. In Washington, construction indemnity is limited by RCW 4.24.115, and your umbrella and stop-gap should match what you agree to.

By Trella Commercial · Updated October 5, 2026

The short version

Contracts set the floor. The highest umbrella limit any client, landlord, or general contractor requires is your minimum.
Additional insured status must reach the umbrella. Being named on your general liability policy does not automatically extend to the umbrella.
Primary and noncontributory means your policies pay before the other party's insurance, including at the umbrella layer.
Follow form requirements mean the umbrella should not be narrower than the underlying policies the contract relies on.
Washington indemnity rules: construction and motor carrier contracts cannot make you indemnify the other party's sole negligence, and any waiver of your workers comp immunity must be specific and negotiated (RCW 4.24.115). That waiver is where stop-gap and the umbrella matter.

Reading the requirement, term by term

Contract language	What it means	How to meet it
"Umbrella or excess liability of not less than $X per occurrence and aggregate"	A minimum limit above your primary policies	An umbrella at or above $X, with underlying limits matching the schedule
"Additional insured" on the umbrella	The other party is covered by your umbrella	An umbrella whose terms extend to parties who are additional insureds on your underlying policies
"Primary and noncontributory"	Your coverage pays before theirs	Endorsements on the underlying policies, and an umbrella that follows them
"Follow form"	The umbrella matches the underlying terms	A follow-form umbrella or excess, or confirmation the umbrella is no narrower where it counts
"Waiver of subrogation"	Your insurers will not sue the other party after paying	Endorsements on general liability, auto, workers comp or stop-gap, and the umbrella
"Per project aggregate"	Each project gets its own general liability aggregate	An endorsement on the general liability policy the umbrella sits on
"Completed operations for X years"	Coverage after the work ends	Continuous general liability and umbrella with products-completed operations

Who requires umbrellas, and what they usually ask for

Party	Typical requirement
General contractors	Umbrella limits scaled to the project, additional insured for ongoing and completed operations, primary and noncontributory, waiver of subrogation
Property managers and landlords	Umbrella over general liability, additional insured status for the owner and manager
Commercial clients and facilities	Umbrella limits in master service agreements, often with auto requirements
Municipalities and public owners	Umbrella and additional insured requirements in permits and contracts
Event venues	Event-specific limits and additional insured status

Washington indemnity rules that interact with your umbrella

Rule	Detail
Sole negligence	In construction, design, survey, and motor carrier contracts covered by RCW 4.24.115, indemnifying the other party for its sole negligence is void
Concurrent negligence	Indemnity is enforceable only to the extent of your own negligence, and only if the agreement specifically and expressly provides for it
Waiver of Title 51 immunity	Allowed only if the agreement specifically and expressly provides for it and it was mutually negotiated
Insurance consequence	A valid waiver can make your employee's injury a claim against you through indemnity, which stop-gap and the umbrella must be ready to cover

Before you sign

Send the full contract to your broker, not just the insurance exhibit.
Compare the required limit with your umbrella and your underlying limits.
Confirm additional insured status reaches the umbrella.
Check indemnity and immunity waivers against your stop-gap and umbrella.
Negotiate what does not fit: limits far above your size, unusual endorsements, or unlimited indemnity.
Get the certificate right, listing the umbrella and its endorsements.

Common questions

Does my umbrella cover additional insureds?

Only if its terms extend coverage to parties who are additional insureds on your underlying policies. Confirm this before signing a contract that requires umbrella coverage for the other party.

What does follow form mean in a contract?

That the umbrella or excess policy should provide coverage on the same terms as the underlying policies. A contract requiring follow form wants the umbrella to be no narrower than the general liability and auto policies it sits on.

What is primary and noncontributory?

A requirement that your insurance pays before the other party's insurance, which does not share the loss. It is usually met with endorsements on your general liability policy, and the umbrella should follow.

Can a Washington contract make me indemnify the other party for their own negligence?

Not for their sole negligence in construction, design, survey, and motor carrier contracts covered by RCW 4.24.115, and only to the extent of your own negligence in concurrent negligence cases.

Can I waive my workers comp immunity in a contract?

In those Washington contracts, yes, but only if the agreement specifically and expressly provides for it and the waiver was mutually negotiated. If you agree to it, make sure stop-gap and your umbrella cover the resulting liability.

Sources

This page is general information, not legal advice. Have contracts reviewed by counsel and your broker before signing. Reviewed October 2026.

More in this guide

Commercial Umbrella and Excess Insurance for Washington and Idaho Businesses
The complete guide this page is part of.
Umbrella vs Excess Liability Insurance: The Difference and Which You Need
Commercial umbrella and excess liability policies both add limits above your general liability, auto, and employers liability, but they work differently. How follow-form excess and umbrella coverage differ, drop-down coverage, retentions, and how to stack them.
What a Commercial Umbrella Covers and What It Does Not
What a commercial umbrella policy covers above your general liability, auto, and employers liability, the claims it can pick up that underlying policies exclude, the standard exclusions (professional, cyber, EPLI, pollution), and the terms to compare.
How Much Commercial Umbrella Coverage Does a Business Need?
How to size a commercial umbrella limit for a Washington or Idaho business: vehicles, premises, products, contract requirements, the assets at risk, large jury verdicts, and how Washington and Idaho fault and damages rules affect the number.
What Drives the Cost of a Commercial Umbrella
Why commercial umbrella premiums vary so much: vehicles, industry, revenue, claims history, underlying limits, and the limit you buy. How additional millions are priced and practical ways to lower the cost without creating gaps.
Washington Stop-Gap and Your Umbrella: The Employers Liability Gap
Why Washington employers need stop-gap employers liability under a commercial umbrella: L&I immunity, when employees can still sue (deliberate intention and contractual waivers under RCW 4.24.115), umbrella underlying requirements, and how to match limits.
Umbrella Underlying Insurance Requirements: The Schedule, Minimum Limits, and Gaps
How a commercial umbrella's schedule of underlying insurance works, the minimum limits it requires for general liability, auto, and employers liability, and the mismatches that leave businesses paying the difference themselves.
Commercial Auto and Your Umbrella: Minimums, Fleets, and Employees' Cars
Why vehicles drive most commercial umbrella decisions: Washington and Idaho minimum auto limits, federal trucking minimums, hired and non-owned auto, employees driving their own cars, and how to line up auto and umbrella limits.
Umbrella Insurance for Rental Property Owners and LLCs
How umbrella coverage works for landlords and real estate investors in Washington and Idaho: personal umbrellas vs commercial umbrellas for rentals, properties held in LLCs, named insured mistakes, and how to cover owners and entities together.
Personal vs Commercial Umbrella: Why Business Owners Need Both, Coordinated
The difference between a personal umbrella and a commercial umbrella, why each excludes what the other covers, where business owners fall into the gap between them, and how to coordinate the two.
Umbrella Insurance for Contractors in Washington and Idaho
Commercial umbrella insurance for contractors in Washington and Idaho: what general contractors and owners require, completed operations, trucks and equipment, Washington stop-gap and immunity waivers in subcontracts, and residential or height exclusions to check.

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