Primary and Non-Contributory: Which Policy Pays First

Of the three standard insurance requirements in a commercial contract, primary and non-contributory is the one people quote most and understand least. It's two separate promises bundled into one phrase, and together they decide a simple but important question: when a claim hits two policies at once, whose pays first — and does yours get to make theirs chip in?

The problem it solves

Say you've added a general contractor to your policy as an additional insured. A claim arises from your work, and now two policies could respond: yours (where the GC is an additional insured) and the GC's own general liability policy.

Left alone, the standard "Other Insurance" condition in each policy tries to sort this out — and it often lands on proportional sharing, where both insurers contribute to the loss. That's exactly what the GC doesn't want: they required you to add them precisely so they *wouldn't* have to burn their own coverage and loss history on a claim tied to your work.

"Primary and non-contributory" overrides that default.

What each word means

• Primary — your policy pays first on the covered claim, before the additional insured's own insurance is drawn on at all.
• Non-contributory — your insurer won't seek contribution from the additional insured's policy. It can't turn around and demand the GC's carrier pay its share.

Put them together and your coverage responds first and in full for the party you agreed to protect, and their own policy stays out of it. For a general contractor managing dozens of subcontractors, that's the whole point — the risk (and the claims history) stays with the party whose work caused the loss.

The endorsement that delivers it

The common ISO form is CG 20 01 — *Primary and Noncontributory – Other Insurance Condition*. It amends the policy's Other Insurance condition so the coverage applies on a primary and non-contributory basis for a person or organization the named insured is required by written contract to cover that way.

Without the endorsement (or equivalent policy wording), you're relying on the default Other Insurance condition — and a carrier can push to split the claim proportionally, which is the outcome the contract was trying to prevent.

What it does *not* do — the costly misconception

This is where contracts go wrong. Primary and non-contributory is often thrown into the same sentence as additional insured and waiver of subrogation, and businesses assume one endorsement covers all of it. It doesn't:

• CG 20 01 does not add anyone as an additional insured — that's a separate endorsement (see the types of additional insured endorsements).
• It does not waive subrogation — that's the separate waiver of subrogation endorsement.
• It does not extend completed-operations coverage — if the contract wants post-completion protection, that still needs the completed-operations additional insured form (CG 20 37).

Each requirement is a distinct question answered by a distinct endorsement. A contract that asks for all three needs all three attached — and, as always, a certificate of insurance doesn't prove any of them; only the endorsements on the policy do.

The three-part package

It's cleanest to think of the standard commercial-contract insurance requirements as a set, each answering a different question:

• Additional insured — is the other party covered under my policy?
• Primary and non-contributory — does my policy pay first, without making theirs share?
• Waiver of subrogation — can my insurer come after them after it pays?

Together they move the risk of your work onto your policy — which is the whole purpose of the insurance section of a contract. The same alignment matters in contractual liability and for contractors specifically.

Our approach

At Cory Washington & Co., we make sure "primary and non-contributory" isn't just words on a certificate — we confirm the endorsement is actually on your policy, written for the parties your contract requires, and we line it up with the additional insured and waiver of subrogation endorsements so all three requirements are genuinely in force. The goal is simple: when a claim tied to your work hits, your policy responds the way the contract says it will — first, in full, and without a fight over who pays.

Lining up a contract's insurance requirements, or unsure what your policy actually carries? Request a quote or a policy review and we'll read the endorsements with you.

Frequently Asked

This article is general information for business owners, not insurance or legal advice, and does not bind or alter coverage. Policy terms, eligibility, and pricing vary by carrier and state — confirm specifics with our licensed team before making decisions.