What a certificate of insurance actually is
A COI is issued by your insurance broker or carrier as a summary snapshot — the policy type, limits and effective dates — for a general contractor, lender or landlord to review.
Certificates vs. additional insured endorsements
Additional insured status requires a specific endorsement attached to the actual policy — a COI can state that a party is additional insured, but that statement alone doesn't make it true if the endorsement isn't actually issued.
How risk transfer actually flows
Project Owner or Developer → General Contractor → Subcontractor
Contract requirements flow down the chain. Uninsured risk flows back up it wherever a link is missed. Open a handoff to see what commonly travels with it.
- Additional insured, ongoing operations
often CG 20 10Extends the downstream party’s general liability to the upstream party for work still in progress. It is the form most contracts have in mind when they say "name us as additional insured", and on its own it generally stops responding once the work is finished. - Additional insured, completed operations
often CG 20 37Covers the same party for claims arising after the work is complete — which is when a great many construction claims actually surface. A contract asking for both ongoing and completed operations is usually asking for two separate endorsements, not one. - Primary and non-contributory
often CG 20 01Commonly decides whether the downstream policy responds first or shares with the upstream party’s own cover. Usually keyed to a written contract requiring it. - Waiver of subrogation
CG 24 04Gives up the insurer’s right to recover from the upstream party after paying a claim. Frequently named alongside additional insured status rather than instead of it. - Indemnity in the prime contractThe contractual promise the insurance is meant to stand behind. California limits how far indemnity can reach on some construction contracts, so the wording matters as much as the endorsements attached to it.
- Certificate, plus the endorsements behind itA certificate evidences that a policy existed on the day it was issued. It is not proof that any particular endorsement sits on that policy, which is why a requirement is commonly checked against the endorsement itself.
A wrap-up changes this picture. Where the owner or developer places an OCIP or CCIP, much of the enrolled work is covered under that program instead, and what each party still has to carry outside it is set by the wrap-up documents.
- Additional insured, ongoing operations
often CG 20 10Extends the downstream party’s general liability to the upstream party for work still in progress. It is the form most contracts have in mind when they say "name us as additional insured", and on its own it generally stops responding once the work is finished. - Additional insured, completed operations
often CG 20 37Covers the same party for claims arising after the work is complete — which is when a great many construction claims actually surface. A contract asking for both ongoing and completed operations is usually asking for two separate endorsements, not one. - Primary and non-contributory
often CG 20 01Commonly decides whether the downstream policy responds first or shares with the upstream party’s own cover. Usually keyed to a written contract requiring it. - Waiver of subrogation
CG 24 04Gives up the insurer’s right to recover from the upstream party after paying a claim. Frequently named alongside additional insured status rather than instead of it. - Subcontract indemnityUsually mirrors what the general contractor already owes the owner upstream, so a gap between the two agreements tends to land on the general contractor.
- Certificate collection and trackingThe administrative half, and the one most often skipped: certificates expire, policies cancel mid-project, and a subcontractor who was compliant at the start is not necessarily compliant at the time of a loss.
The general contractor is usually both the party enforcing this and the party left exposed when a subcontractor’s endorsement turns out to be missing.
The limits a contract asks for, and what each one means
Contracts commonly state required limits as well as required endorsements. One million dollars per occurrence with a two million dollar general aggregate is a combination many construction agreements use, but the figures vary by project, by owner and by trade, and the limit is only one number on the policy — it says nothing about what is excluded or which endorsements are attached.
- Per occurrence
- The most the policy generally pays for any one covered occurrence.
- General aggregate
- The most it generally pays across the policy term. Some contracts ask for it to apply per project, which is its own endorsement.
- Products and completed operations aggregate
- A separate bucket for claims arising after the work is finished, which is where completed-operations additional insured status becomes relevant.
- Umbrella or excess above it
- Sits above the underlying limits. If the underlying policy does not match what the umbrella requires beneath it, the tower may not respond as the contract assumes.
Common California COI requirements
General contractors, lenders, property managers and public agencies in California commonly require a COI listing specific liability limits, additional insured status, and sometimes a waiver of subrogation.
How fast a COI can be issued
Once the right endorsement is already on the policy, issuing the certificate itself is usually the fastest part of the process — a standard COI can often be issued same-day, though that is never a guarantee: workload and what time of day the request comes in both affect it.
From our case files: certificates and endorsements that made or broke the job
When a general liability audit tried to charge one of our clients about $8,000 for subcontractor costs, the certificates on file — each one listing our client on the sub's policy both as an additional insured and as the holder — were what got every dollar removed (case study 11).
Getting a certificate of insurance
Provide the specific party requesting the certificate, any required limits or endorsement language, and the project or lease it relates to.
Why certificates and endorsements get rejected
A contractor certificate of insurance getting rejected almost always comes down to one of a handful of recurring reasons, not a random paperwork problem — and most of them trace back to the difference between what a certificate shows and what an endorsement actually does.
Frequently asked questions
11 questions — start typing to filter
Does a certificate of insurance prove additional insured status?
Not by itself. The certificate can state that a party is additional insured, but that's only accurate if the actual endorsement is issued on the policy — request the endorsement copy to verify.
How quickly can I get a certificate of insurance?
It depends. A certificate that doesn't require any new endorsement can often be issued the same day, though same-day is never guaranteed, since it depends on workload and what time of day the request comes in. One that needs a new or updated endorsement — a new additional insured, specific wording, a higher limit — usually cannot be same-day, since the carrier has to process that endorsement first. If you need it the same day, say so upfront so we can tell you right away whether that's realistic for your specific request.
What information does a California GC or lender typically require on a COI?
Specific liability limits, additional insured status, and sometimes a waiver of subrogation are common — but requirements vary by project, so read the actual contract or lease.
Can a certificate of insurance create coverage that isn't in the actual policy?
No. A certificate is a summary, not a contract — it can't modify or add to the actual policy language.
Does Gleason Insurance Brokers issue certificates of insurance for California clients?
Yes — certificate issuance is part of ongoing service for our clients throughout California and our other licensed states.
Who is legally allowed to issue a certificate of insurance?
Only the insurance carrier or its authorized agent/broker can issue a valid certificate — a client, subcontractor or GC cannot self-issue one, and a certificate issued by an unauthorized party isn't binding evidence of coverage.
What happens if a certificate lists coverage that doesn't match the actual policy?
The certificate itself doesn't control — the issued policy and its endorsements govern what's actually covered, so a discrepancy typically gets resolved in the policy's favor, not the certificate's. Always confirm material terms against the policy directly.
Why was my certificate of insurance rejected by the GC?
Most rejections trace back to the underlying endorsement, not the certificate itself — the certificate only shows a policy exists. Common causes: the additional insured endorsement covers ongoing operations only (CG 20 10) when the contract also requires completed operations (CG 20 37); primary and noncontributory wording wasn't added; or a scheduled additional insured endorsement lists an outdated entity instead of the current GC. Checking the actual contract's insurance exhibit against the endorsements on file — not just the certificate — is how to confirm before submitting.
What's the difference between CG 20 10 and CG 20 37?
CG 20 10 adds additional insured status for ongoing operations — while the named contractor is still actively performing work. CG 20 37 adds it for completed operations — after the work is finished, which is when most construction defect and injury claims actually surface. Current CG 20 10 editions no longer include completed operations at all, so a policy carrying only CG 20 10 leaves a real gap; most well-drafted construction contracts require both forms together, not one or the other.
Do roofing subcontractors need special certificate language?
Often, yes — roofing certificates commonly need to show both ongoing and completed operations additional insured status, since roofing claims frequently surface after the job is done. See our roofing insurance California guide for what a GC typically requires on a roofing sub's certificate.
What's the difference between an additional insured and a certificate holder?
They're not the same thing, even though both names often appear on the same certificate. See our full breakdown of additional insured vs. certificate holder for exactly how the two differ and why the distinction matters when a contract specifically requires one.