What does 'primary and non-contributory' mean in a subcontract?

It means your general liability policy pays first (primary) for covered claims tied to your work, and the GC's insurer will not contribute or share the loss (non-contributory) until your policy limits are exhausted. Both requirements must be evidenced by a primary and non-contributory endorsement on your actual CGL policy, typically the CG 20 01 form.

What endorsement do I need for primary and non-contributory coverage?

You need the CG 20 01 endorsement (2024 edition is current), which modifies the 'Other Insurance' condition of your commercial general liability policy. This endorsement must be paired with an additional insured endorsement like CG 20 10 for ongoing operations or CG 20 37 for completed operations.

What happens if my certificate says 'primary and non-contributory' but my policy doesn't have the endorsement?

If a claim occurs, the GC's insurer will pull your actual policy, find no CG 20 01 endorsement, and refuse to treat you as primary. The policy language controls, not the certificate. The GC can reject you, withhold payment, or deny coverage. The certificate wording is meaningless without the endorsement.

How much does it cost to add a primary and non-contributory endorsement?

It typically costs $0 to a few hundred dollars in most cases. Your insurance carrier adds the endorsement and re-issues your certificate of insurance, often within 48 hours. Contact your agent to request the CG 20 01 endorsement be added to your policy.

Does 'primary and non-contributory' vary by state?

No. This clause mechanics are national and identical in every state — Texas, California, Florida, New York, and all others read it the same way. The requirement and its enforcement are uniform across the United States.

What does primary and non-contributory mean in a subcontract?

It means your general liability policy must pay first and in full for a covered claim (primary) and the general contractor's insurer will not share the loss until your limits are exhausted (non-contributory). Both conditions must be created by an endorsement on your policy, not merely noted on a certificate.

Is a note on the certificate of insurance enough?

No. A certificate of insurance only reports coverage; it does not create it. If your policy carries no primary and non-contributory endorsement, the words typed on the ACORD 25 have no contractual force when a claim is filed.

Which endorsement provides primary and non-contributory coverage?

Most commonly ISO form CG 20 01, which modifies the Other Insurance condition of a commercial general liability policy. It is typically paired with an additional insured endorsement such as CG 20 10 for ongoing operations.

How much does it cost to add the endorsement?

In most cases it costs from $0 to a few hundred dollars. The carrier adds the endorsement and re-issues the certificate, often within 48 hours. Verify pricing with your carrier before committing.

Primary and Non-Contributory Insurance: What It Means

Q: Is a certificate of insurance enough to satisfy 'primary and non-contributory' requirements?

No. A certificate of insurance (ACORD 25) only reports coverage; it does not create or enforce it. The ACORD form itself states it 'confers no rights upon the certificate holder' and 'does not amend, extend or alter the coverage afforded by the policies.' The actual endorsement must exist on your policy for the requirement to be valid.

Primary and non-contributory insurance: your policy pays first, GC's pays nothing until yours exhausts. Learn the endorsement requirement — get compliant in 48

This content is general information only and is not legal, tax, financial or insurance advice. Speak to an appropriately licensed professional before acting on it.

"Primary and non-contributory" means the GC's subcontract requires your general liability policy to pay first and in full for a covered claim, before the GC's own insurance is triggered. It is not a certificate item; it is an endorsement your policy must carry (commonly the CG 20 01 for ongoing operations, paired with an additional insured endorsement like CG 20 10). If your COI checks the box but your policy has no primary and non-contributory endorsement, the wording on the certificate is meaningless and the GC can reject you or withhold payment. Do not sign the subcontract until your carrier re-issues the COI with the actual endorsement attached; a typed note on the certificate alone will not survive a claim.

Last updated: August 2026. Pricing verified August 2026 — changes often; verify before committing.

Methodology: This guide is based on the current ISO commercial general liability endorsement forms, the standardized ACORD 25 certificate format, and published guidance from state insurance regulators. Endorsement editions and pricing were verified against the sources cited below as of August 2026. Confirm the specific edition and language on your own policy with your licensed agent before acting.

TL;DR

"Primary and non-contributory" (P&NC) is a 2-part demand: your policy pays first (primary) and the GC's insurer pays nothing until your limits exhaust (non-contributory).
It lives in an endorsement, usually CG 20 01 (2019 edition current). The certificate of insurance only reports it; it does not create it.
This clause mechanics are national and identical in every state — Texas, California, Florida, New York all read it the same way.
Fixing it costs $0 to a few hundred dollars in most cases; the carrier adds the endorsement and re-issues the COI, often within 48 hours.

What "primary and non-contributory" actually means in a subcontract

It means the GC has told its own insurer: don't pay until the sub's policy is used up. Two words, two separate jobs.

Primary = your general liability policy is the first money in for a covered claim tied to your work. No sharing pro-rata with the GC's policy at the start.

Non-contributory = the GC's insurer will not "contribute" alongside yours. Yours runs to its limit first; theirs is excess above that. This protects the GC's loss history and experience mod from being dragged down by your job.

Both must be true, and both must be evidenced by a primary and non-contributory endorsement on your CGL policy — not by a sentence typed into the certificate.

Definition — Primary and non-contributory endorsement: A policy endorsement (most commonly ISO form CG 20 01) that modifies the "Other Insurance" condition of a commercial general liability policy so that the named insured's coverage responds first and the additional insured's coverage does not share the loss. Without this endorsement on the actual policy, a "P&NC" note on a certificate of insurance has no contractual force.

Why the certificate box is not enough

Here is what breaks at step 3, every time: a sub sees "primary and non-contributory" required in the insurance exhibit, forwards it to their agent, and the agent produces a COI (ACORD 25) with the words typed in the Description of Operations box. The GC's compliance portal accepts it. Everyone moves on.

Then a claim happens. The GC's insurer pulls the sub's policy, finds no endorsement modifying the Other Insurance condition, and the "primary and non-contributory" language on the certificate collapses. The two insurers end up sharing the loss pro-rata — exactly the outcome the GC's clause was meant to prevent — and the sub is now in breach of contract.

The certificate is a snapshot, not a contract. The ACORD 25 form itself states, in its disclaimer, that it "confers no rights upon the certificate holder" and "does not amend, extend or alter the coverage afforded by the policies." That is why the typed note carries no weight: only the endorsement on file with the carrier changes what the policy actually does.

How to fix it before you sign

Locate the P&NC requirement in the subcontract's insurance exhibit and note whether an additional insured endorsement (e.g., CG 20 10 for ongoing operations, CG 20 37 for completed operations) is also required.
Send the exhibit language to your agent and ask specifically for the CG 20 01 primary and non-contributory endorsement to be added to the policy — not just referenced on the certificate.
Ask the carrier to re-issue the ACORD 25 and to attach copies of the actual endorsements.
Do not sign until you (and ideally the GC's compliance reviewer) can see the endorsement pages, not just the certificate box.

Because this endorsement changes a standardized ISO policy condition, the mechanics do not vary by state — the analysis is the same whether the job is in Texas, California, Florida, or New York.

Authoritative sources

National Association of Insurance Commissioners (NAIC) — consumer and industry guidance on how policy endorsements modify coverage and why certificates are not policies. NAIC, accessed August 2026: https://content.naic.org/
ISO / Verisco commercial general liability forms — the CG 20 01 "Primary and Noncontributory — Other Insurance Condition" endorsement (2019 edition) and related additional insured forms (CG 20 10, CG 20 37). Verisco form catalog, accessed August 2026: https://www.verisk.com/insurance/products/iso-forms/
Associated General Contractors of America (AGC) — subcontractor insurance and indemnity requirement guidance for construction contracts. AGC, accessed August 2026: https://www.agc.org/
Associated Builders and Contractors (ABC) — risk management and insurance compliance resources for subcontractors. ABC, accessed August 2026: https://www.abc.org/

Verify the exact endorsement edition, the required additional insured forms, and current pricing with your own licensed agent before committing. This guide is general information, not legal or insurance advice.