Primary and noncontributory (P&N) is a contractual insurance requirement that forces one party's liability policy to pay first — before any other coverage — and prohibits it from seeking contribution from the other party's insurer. In plain terms: when you're listed as an additional insured on a subcontractor's policy that carries P&N language, your own policy sits on the sideline unless the sub's limits are exhausted.
Who this is for: General contractors, property owners, municipalities, and any business that requires additional insured status in vendor or construction contracts.
TL;DR / Key Takeaways
- Primary means the named insured's policy responds before any coverage the additional insured carries.
- Noncontributory means the named insured's policy cannot demand the additional insured's policy share in the loss — even if both policies cover the same claim.
- The requirement is typically satisfied by adding ISO endorsement CG 20 01 (or a carrier equivalent) to a commercial general liability (CGL) policy.
- Without P&N language, two insurers covering the same loss will apply the "other insurance" clause and split costs proportionally — which can trigger your own policy and erode your limits.
- P&N is now standard in most construction subcontracts, commercial leases, vendor agreements, and government contracts.
What Does "Primary and Noncontributory" Actually Mean?
When two policies could both respond to the same liability claim, the standard ISO "other insurance" condition says the policies should share the loss proportionally or on an excess basis. Primary and noncontributory overrides that default. It works in two layers:
| Term | What it does | What changes without it |
|---|---|---|
| Primary | Named insured's policy pays first, dollar one | Policies negotiate or split at the outset |
| Noncontributory | Named insured's policy never asks the AI's insurer to chip in | Other insurer may be required to contribute its share |
| Combined (P&N) | Named insured's policy exhausts before AI's policy is even touched | Both policies can be triggered immediately |
The practical effect: a general contractor named as an additional insured on a subcontractor's $1M CGL policy with P&N language will not see its own policy touched for a covered claim that falls within the sub's limits.
Which Endorsement Satisfies Primary and Noncontributory?
Most carriers use an ISO form or a proprietary equivalent. The most widely recognized is:
- CG 20 01 04 13 — "Primary and Noncontributory – Other Insurance Condition" (ISO Commercial General Liability)
- Some carriers write manuscript or proprietary endorsements with equivalent language
How to Add P&N to a CGL Policy in 4 Steps
- Identify the contract requirement. Read the upstream contract (subcontract, lease, vendor agreement) to find the exact AI and P&N language required — including which entity must be named.
- Request the endorsement from your broker. Ask for ISO CG 20 01 or the carrier's equivalent. Some carriers include P&N in their blanket additional insured endorsements; confirm which specific form applies.
- Confirm the certificate. The certificate of insurance (ACORD 25) should reference the P&N endorsement in the Description of Operations box. The certificate alone is not proof of the endorsement — request a copy of the actual form.
- Deliver and retain documentation. Send the COI and endorsement copy to the upstream party before work begins. Keep copies for your records — they matter if a claim is ever disputed.
How Primary and Noncontributory Interacts with Other Insurance Clauses
Every liability policy contains an "other insurance" provision that governs what happens when two policies cover the same loss. Without P&N, the other insurance clause typically creates one of three outcomes:
| Scenario | Result without P&N | Result with P&N |
|---|---|---|
| Sub and GC both have CGL | Policies prorate the loss by their respective limits | Sub's policy pays in full; GC's policy untouched |
| Sub's policy has lower limits than the loss | GC's policy picks up the excess | Same — GC's policy still excess, but sub's pays first |
| Sub's policy is claims-made; GC's is occurrence | Both may argue the other should respond first | P&N resolves priority; sub's policy is primary |
| One policy has a SIR (self-insured retention) | SIR may delay the other policy's obligation | Sub's SIR still applies; GC's policy remains excess |
Important nuance: P&N endorsements typically apply only to the extent the named insured is liable. If the additional insured's (GC's) sole negligence causes the loss, the sub's P&N policy will not cover it — coverage for additional insureds is generally limited to vicarious or shared liability.
What Coverage Is and Is Not Affected
P&N is a priority-of-payment rule, not a coverage grant. It does not expand what the underlying policy covers.
P&N applies to: - Commercial General Liability (CGL) — occurrence and claims-made forms - Commercial Auto Liability (sometimes required separately)
P&N does NOT apply to (and cannot override): - Workers' compensation policies (statutory coverage; separate rules govern) - Property/inland marine policies - Umbrella/excess policies (unless specifically endorsed — confirm with your carrier) - Pollution liability or professional liability (these are separate policy lines)
Real-World Example: Electrical Subcontractor on a Commercial Build
Scenario (illustrative — not a guarantee of coverage):
A commercial GC in Texas hires an electrical subcontractor for a $2.8M office fit-out. The subcontract requires the sub to name the GC as an additional insured on a $1M per-occurrence CGL policy and to provide P&N.
During rough-in, an electrician inadvertently causes a fire that damages the building shell. The property owner sues the GC and the sub jointly. The claim is valued at $480,000.
- Without P&N: The sub's CGL and the GC's CGL each apply their "other insurance" clause. Since both policies have $1M limits, they prorate 50/50. The GC's insurer pays $240,000, depleting $240,000 of the GC's own limits and triggering the GC's claims history.
- With P&N: The sub's CGL responds first for the full $480,000. The GC's policy is never touched. The GC's loss history and limits remain intact — a meaningful competitive advantage at renewal.
Realistic COI/endorsement cost impact: Adding a P&N endorsement to a subcontractor's CGL typically costs $50–$300 per policy year, depending on carrier and trade. Some carriers include it in the base premium when blanket additional insured language is purchased.
Frequently Asked Questions
What is primary and noncontributory in insurance?
Primary and noncontributory is a policy provision — usually added by endorsement — requiring the named insured's liability policy to pay first on any covered claim involving an additional insured, without seeking contribution from the additional insured's own insurer.
Is P&N the same as being named as an additional insured?
No. Additional insured status grants coverage on the named insured's policy. P&N determines payment priority when the additional insured also has its own coverage. You can be an additional insured without P&N; the contract may require both.
Does P&N apply to umbrella or excess policies?
Not automatically. Most umbrella policies follow the terms of the underlying CGL, but P&N language must typically be requested separately for umbrella/excess coverage. Always verify whether the upstream contract requires P&N at the umbrella layer.
How do I verify that a subcontractor's policy actually has P&N?
Request a copy of the actual endorsement — not just the certificate. ISO form CG 20 01 (or the carrier's equivalent) should appear in the policy documents. Certificates can reference endorsements in the Description of Operations box, but the certificate itself is not evidence of coverage.
Can a carrier refuse to add P&N?
Some carriers limit or exclude P&N in certain industries or occupancy classes. If a carrier won't add it, the sub may need to find a different carrier — or the GC may need to negotiate alternate contract language. An independent broker can help identify markets that routinely write P&N.
Does P&N protect against the additional insured's own negligence?
No. Additional insured coverage under a CGL is typically limited to liability arising out of the named insured's operations. If the GC (AI) is solely negligent, the sub's policy — even with P&N — will not respond to that portion of the claim.
Is "primary and noncontributory" required by law?
No. It is a contractual requirement, not a statutory one. However, it is now so common in construction, real estate, and government contracting that declining it can be a barrier to winning work.
What if the certificate says P&N but the endorsement isn't there?
The policy controls, not the certificate. If a claim arises and the endorsement is missing, the carrier can apply the standard "other insurance" provision. This is a known source of coverage disputes — always verify the actual endorsement form.
Why Work with Morrow on P&N Requirements
- We place with multiple carriers. As an independent agency, Morrow shops P&N-compliant CGL across a broad panel of admitted and E&S markets, so you aren't locked into one carrier that may resist adding the endorsement.
- Fast certificate and endorsement turnaround. Construction contracts move quickly. Morrow issues ACORD certificates and endorsement copies same-day in most cases — minimizing project delays caused by missing compliance documents [Morrow to confirm].
- Contract language review. We read upstream contracts and flag AI, P&N, waiver of subrogation, and limits requirements before you bind, so you know exactly what endorsements are needed.
- Claims advocacy. If a coverage dispute arises over P&N priority, Morrow advocates on your behalf — coordinating with the carrier and, when necessary, connecting you with coverage counsel.
- Trade-specific expertise. From general contractors to specialty trades (electrical, HVAC, roofing), we understand the standard contract language each trade encounters and structure policies accordingly.
Get a Quote
Ready to confirm your CGL has the primary and noncontributory language your contracts require? Morrow reviews your contract requirements and shops the right markets.
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Licensed commercial P&C insurance agency | Placing coverage with A-rated admitted and surplus lines carriers | [Morrow to confirm: licensed states, NPN, and carrier panel]
Related Pages
- Commercial General Liability Insurance — the base policy where P&N is most commonly endorsed
- Additional Insured vs. Certificate Holder — understanding the difference between AI status and certificate-only listing
- Waiver of Subrogation Explained — another common contractual insurance requirement often paired with P&N
- Construction Insurance — how P&N, AI, and other contract requirements apply to GCs and subcontractors
- Certificate of Insurance (COI) — what a COI can and cannot prove about your coverage
Author: Sarah Kincaid, CPCU, CIC — Commercial Lines Coverage Specialist with 14 years of experience placing construction and contractor liability programs across admitted and surplus lines markets.
Published: June 2026 | Last updated: June 2026
Sources: - Insurance Services Office (ISO), CG 20 01 04 13 — Primary and Noncontributory endorsement form - ISO Commercial General Liability Coverage Form CG 00 01 - Insurance Information Institute (III) — Commercial Liability Insurance resources - National Association of Insurance Commissioners (NAIC) — commercial lines consumer guidance - American Institute for CPCU / Insurance Institute of America — CGL coverage analysis