Primary and noncontributory insurance explained

Why the order of insurance matters

When a claim involves two parties who both have insurance, the policies need a way to decide which one pays and in what order. Each liability policy contains an other insurance condition that sets out how it responds when other coverage also applies.

Without contract terms or endorsements that change the default, two insurers covering the same claim may share the loss, argue over who goes first or each point to the other. That can slow down defense and settlement and draw the client’s own insurance into a claim caused by your work.

Primary and noncontributory wording settles the question in advance. It tells both parties and both insurers that your policy will respond first and alone, up to its limits, for claims covered by the additional insured endorsement.

What primary means

Primary means your policy responds before any other policy available to the additional insured. If the client is sued over your work and qualifies as an additional insured on your policy, your insurer defends and pays first. The client’s own insurer steps in only if your limits are exhausted or the claim falls outside your coverage.

Standard general liability policies already treat themselves as primary in many situations, but the other insurance condition also contains exceptions that can make your policy excess over other coverage the additional insured has. That is why contracts ask for explicit language.

What noncontributory means

Noncontributory means your insurer will not seek contribution from the additional insured’s own insurance. Even if the client’s policy might also cover the claim, your insurer agrees not to ask it to share the cost.

Primary alone is not enough for most clients. A policy can respond first but later seek a share of the cost from other insurers. Noncontributory closes that door, which is why contracts usually require both words together.

A simple example

Imagine a cleaning contractor working in an office building under a contract with the property manager. A visitor slips on a wet floor and sues both the contractor and the property manager. The property manager is an additional insured on the contractor’s general liability policy.

If the contractor’s policy includes primary and noncontributory wording that matches the contract, the contractor’s insurer defends the property manager and pays a covered settlement up to its limits, without asking the property manager’s insurer to share. If the wording is missing, the two insurers may each argue that the other should pay first or that the cost should be split, which can delay the defense and leave the property manager reporting a claim on its own policy.

The example is simplified, and the actual outcome depends on the policy wording, the contract and the facts of the claim.

Why contracts require it

Clients, owners and landlords want claims arising from your work paid by your insurance, not theirs. Claims on their own policies can raise their premiums, erode their limits and complicate their renewals. Primary and noncontributory wording protects their loss history and keeps their coverage available for their own risks.

The requirement is standard in construction subcontracts and increasingly common in service agreements, facility contracts and commercial leases. It almost always appears alongside additional insured and waiver of subrogation requirements.

How the endorsement works

ISO publishes an endorsement titled Primary and Noncontributory Other Insurance Condition, numbered CG 20 01. Many insurers use it or their own equivalent, and some include primary and noncontributory language inside a blanket additional insured endorsement.

These endorsements generally apply only when two conditions are met. The other party must be an additional insured on your policy, and you must have agreed in a written contract that your insurance will be primary and noncontributory. If either condition is missing, the default other insurance rules apply.

Because the endorsement depends on additional insured status, the two must line up. A primary and noncontributory endorsement does little for a party who is not an additional insured, and an additional insured endorsement without primary and noncontributory language may leave your policy excess in some situations.

Umbrella and excess policies

Many contracts require primary and noncontributory treatment on the umbrella or excess policy as well. Umbrella forms handle this in different ways. Some follow the underlying policy terms automatically, some contain their own other insurance language and some need a separate endorsement.

If the contract requires the umbrella to respond before the client’s own umbrella, check the umbrella form specifically. A primary and noncontributory endorsement on the general liability policy does not automatically change the umbrella.

Ask your broker to confirm in writing how the umbrella will respond to a claim involving the additional insured, and keep that confirmation with the contract.

Common gaps

Problems with primary and noncontributory requirements usually surface when a certificate is reviewed or after a claim is filed. The most frequent gaps are predictable.

• The certificate says primary and noncontributory but the policy has no matching endorsement.
• The blanket endorsement requires a written contract signed before the loss, and the contract was signed late.
• The endorsement applies to general liability but the contract also requires it on auto or umbrella.
• The party named in the contract is not an additional insured, so the endorsement does not apply to them.
• The contract language asks for broader treatment than the endorsement provides.

How it fits with indemnity and waivers

Primary and noncontributory wording is one part of a risk transfer package. Additional insured status gives the client rights under your policy. Primary and noncontributory wording decides the order of payment. A waiver of subrogation stops your insurer from pursuing the client afterward. The indemnity clause in the contract sets out your own promise to defend and pay for certain claims.

Each piece is checked separately. A contract can be satisfied on additional insured status but fail on primary and noncontributory wording, or the other way round. Reviewing all of them together before signing avoids last minute certificate problems.

Primary and noncontributory on auto policies

Commercial auto policies have their own other insurance provisions. Contracts that involve driving on a client’s behalf, transporting goods or operating on a client’s premises may ask for primary and noncontributory auto coverage. Many auto insurers address this through blanket or scheduled endorsements, and wording varies by insurer.

Primary and noncontributory checklist

• Confirm the contract requires additional insured status and primary and noncontributory wording together.
• Check that your general liability policy includes a matching endorsement, blanket or scheduled.
• Check the umbrella and auto policies if the contract mentions them.
• Make sure the contract is signed before work begins so blanket conditions are met.
• Ask for a copy of the endorsement if the client requests proof.
• Recheck the endorsements at every renewal.