These two terms appear on nearly every certificate of insurance, and they're constantly confused — including by the parties requesting them. The difference is not cosmetic: one gets proof of insurance, the other gets actual coverage.

Certificate holder

A certificate holder is simply the person or company that receives the certificate of insurance (COI). Being listed as the holder means one thing: they get a snapshot showing the policy exists, its limits, and its dates. It grants no rights under the policy and no coverage. If that party is later sued over the policyholder's work, holder status does nothing for them.

Additional insured

An additional insured is a party added to the policy by endorsement so the policy's coverage extends to them for liability arising out of the named insured's work or operations. If a customer is injured on a job and sues both the contractor and the property owner, an additional-insured endorsement is what lets the owner tap the contractor's policy for defense and damages.

Why the difference is costly

A landlord or general contractor who only asks to be a “certificate holder” thinks they're protected — but they aren't. They need to be named as an additional insured, with the certificate reflecting that the endorsement is in place. A certificate that lists someone as holder but not additional insured is a frequent, expensive gap discovered only at claim time.

How each is set up

  • Certificate holder: the agent simply enters the name and address when issuing the COI — no policy change, no premium.
  • Additional insured: requires an actual endorsement to the policy (often a CG 20 10 / CG 20 37 on general liability). It changes the policy, may carry a small premium, and the specific form matters.

For agents: when a client forwards a contract that says “name us as additional insured,” don't just add a certificate holder — request the endorsement and confirm the form meets the contract's wording. See also CG2010 vs CG2011 and waiver of subrogation, which contracts often require alongside additional-insured status.

Educational only — confirm against the actual policy and your carrier's guidelines.