How to add additional insured status to a policy

When you sign a lease, a subcontract or a vendor agreement, the insurance clause will almost always say that the other party is to be named as an additional insured on your general liability policy. What they are asking for is a right to be defended and indemnified by your carrier if someone sues them because of something you did: a customer of yours who falls in the shared lobby and sues the landlord, an apprentice on another trade injured by your crew who sues the general contractor, a festival-goer burned at your booth who sues the organiser. Without the endorsement, those parties turn to their own carriers, and then their own carriers turn to you under the indemnity clause in the same contract. With it, the claim goes to your carrier first and stays there.

The request is routine and the endorsement is usually inexpensive. What goes wrong is precision: the clause asks for a specific kind of additional insured status, the policy is endorsed with a different kind or with nothing at all, and the certificate papers over the difference until a claim exposes it. This guide sets out how to read the request, which endorsement answers it, and how to make sure the policy actually contains what the certificate says.

What to gather first

The endorsement has to match a document, so start with the documents.

• The contract, lease or permit with the insurance clause and the indemnification clause both marked; they work together and the carrier will read both.
• The exact legal name and address of the party to be added, and of any others the clause sweeps in, such as the owner, the lender, the property manager or the city.
• Your general liability policy with its current endorsements, to see whether a blanket additional insured endorsement is already attached.
• The same for the commercial auto and the umbrella, since some clauses ask for additional insured status on those as well.
• The certificate the other party has asked you to complete, if they have supplied a template with the wording they expect.
• The date the work or the lease begins, because the endorsement has to be in force before the loss, and the contract has to be signed before it too.

Step one: work out what the clause is actually asking for

Additional insured is a category, not a single endorsement, and the clause usually specifies which member of the category it wants, sometimes by form number. The main distinctions are these. Ongoing operations coverage protects the other party for claims arising while your work is in progress; completed operations coverage protects them for claims arising after your work is finished, which for a contractor is where the serious claims live, and it is a separate endorsement that many policies do not include by default. A landlord's lease asks for a different endorsement again, one written for managers or lessors of premises, which covers the landlord for claims arising from your use of the space you rent.

Then there are the modifiers. Primary and noncontributory means your policy pays first and does not ask the other party's policy to share; without it, two policies covering the same party argue about proportion. A waiver of subrogation, often requested in the same sentence, is a separate endorsement that stops your carrier from recovering from the other party after paying a claim. A per-project aggregate keeps a claim on one job from depleting the limit available on another. Each of these is a distinct endorsement with a distinct charge, and a clause that names all of them is asking for four or five changes to the policy, not one.

Step two: choose blanket or scheduled

A scheduled endorsement names a specific party for a specific project or premises, and is added each time a contract requires it. It is exact, it costs a fee per addition, and it takes days each time. A blanket endorsement grants additional insured status automatically to any party the named insured is required by a written contract to add, without naming them, and is added once for the policy year. For any business that signs more than a couple of contracts a year, the blanket form is the sensible purchase; a general contractor's subcontractor in the Phoenix or Las Vegas construction market may be asked for a dozen certificates a season, and a scheduled endorsement for each would cost more in fees and delay than the blanket does in premium.

The blanket form has a condition that matters: the status exists only where a written contract, signed before the loss, requires it. A handshake agreement, an email exchange or a contract signed after the injury does not trigger it. Blanket endorsements also vary in scope; some cover ongoing operations only, and completed operations needs its own blanket form or a specific endorsement. Ask which your policy has and read the wording. Where a clause names a party the blanket form would not reach, for instance a lender or an owner with no contract with you, a scheduled endorsement for that party fills the gap.

Step three: understand what the status does and does not do

Additional insured status covers the other party only for liability arising out of your work or your use of their premises. Current endorsement forms generally limit it further to liability caused in whole or in part by your acts or omissions, so the other party's own sole negligence is not covered even though older forms sometimes covered it; a contract that demands coverage for the other party's sole negligence is asking for something modern forms rarely give, and the clause should be negotiated rather than promised. The status does not cover the other party for their own operations unrelated to you, does not cover their employees' injuries, and does not extend to their professional liability.

It also does not add limit. The additional insured shares your per-occurrence and aggregate limits, so a large claim brought against a landlord or a general contractor as your additional insured reduces what is left for claims against you. This is why the same clauses that ask for the status also ask for higher limits and a per-project aggregate; the two requests are connected, and a business adding several additional insureds should look again at its aggregate and consider an umbrella. Finally, the status lives on the policy that grants it: general liability endorsements do not reach the auto policy, and the umbrella follows the underlying policies only if its own wording says so.

Step four: add it, prove it and keep the file

Send the clause to your agent and ask for the specific endorsements it requires, by form or by description: ongoing and completed operations, primary and noncontributory, waiver of subrogation, per-project aggregate, and the equivalents on auto and umbrella where the clause asks for them. Ask for the endorsement documents themselves, not just a certificate, and read the schedule on each to confirm the party's name, the project, and the dates. Only then have the certificate issued, with the additional insured column ticked on the relevant rows and the description box reflecting what is actually attached.

Keep the signed contract, the endorsements and the certificate together, by counterparty, for as long as a claim could arise, which for completed operations is years after the job ends. When the policy renews, a blanket endorsement carries forward if it is renewed with the policy; scheduled endorsements may need to be re-added, and a general contractor's compliance department will ask for a fresh certificate at every policy anniversary during the project. If your own business hires subcontractors, mirror the process: require additional insured status on their policies with the same endorsements your customer demanded of you, and collect their endorsements as evidence, not only their certificates.

Common mistakes

Additional insured disputes almost always come down to one of these.

• Relying on the certificate's description box while the policy has no endorsement behind it.
• Adding ongoing operations coverage when the contract demanded completed operations too.
• Signing the contract after the work started and finding the blanket endorsement's written-contract condition was not met on the day of the loss.
• Promising primary and noncontributory in the certificate without buying the endorsement.
• Naming the wrong entity, such as the property manager instead of the owner, or a trade name instead of the legal name.
• Adding a dozen additional insureds and never revisiting the aggregate limit they all share.
• Assuming a general liability endorsement covers the auto and umbrella policies as well.
• Adding a party and then dropping the coverage at renewal while the completed work is still out in the world.

A worked example

Suppose a Henderson HVAC subcontractor with a general liability policy at $1,000,000 per occurrence and $2,000,000 aggregate signs a subcontract for a medical office build-out whose clause demands additional insured status for the general contractor and the building owner, for ongoing and completed operations, primary and noncontributory, with a waiver of subrogation and a per-project aggregate. The policy already carries a blanket ongoing-operations endorsement. Say the agent adds a blanket completed-operations endorsement for $250, primary and noncontributory wording for $100, a blanket waiver of subrogation for $150 and a per-project aggregate for $300, and issues a certificate with the endorsements attached after the subcontract is signed and before the crew arrives. Two years after completion a condensate line the subcontractor installed leaks into a lower suite and the tenant sues the owner and the general contractor for $180,000 of damage. Both tender to the subcontractor's carrier, which accepts the tender under the completed-operations endorsement, defends them, and settles from the subcontractor's per-project aggregate, leaving the aggregate on the subcontractor's other jobs untouched. Without the completed-operations endorsement both tenders would have been declined and both parties would have pursued the subcontractor under the indemnity clause. The figures are hypothetical.

How to use this

Send us the clause and the current policy and we will identify which endorsements it actually requires, add them across the carriers we represent in Arizona, Nevada, Utah and Idaho, and issue the certificate only when the endorsements are on the policy. If the policy already carries the blanket forms the clause needs, the answer is a certificate and nothing more, and we will say so before charging for anything.