What Is a Certificate of Insurance (COI) for Contractors? Complete Guide

What Information Appears on a COI?

The standard form used across the industry is the ACORD 25, maintained by ACORD, the nonprofit standards organization for the insurance industry. Nearly every carrier and broker issues certificates on this form. Knowing what each section contains lets you catch errors before they cost you a project.

Producer and Insured Details

The top left of the form identifies your insurance producer, which is the agency or broker who issued the certificate. Below that is the insured block, which must match your legal business name exactly as it appears in your policy and your contract. A mismatch between "Smith Roofing LLC" and "Smith Roofing" is enough to get a COI rejected by a compliance manager on a commercial project. Get this right before you submit anything.

Coverage Types and Limits

The body of the form lists each active policy by type: general liability, workers compensation, commercial auto, umbrella or excess liability, and any other lines you carry. For each policy the certificate shows the insurer name, policy number, effective and expiration dates, and the coverage limits. General liability limits appear as an each-occurrence limit, a general aggregate, a products-completed operations aggregate, and a personal and advertising injury limit. These are not the same number and a certificate holder requesting $2 million in coverage may mean the aggregate, the per-occurrence limit, or both. Know which one the contract requires before you request the certificate.

Certificate Holder Information

The bottom left block is where the requesting party's name and address goes. This is the certificate holder. Being listed here gives them the right to receive notice if your policy is cancelled. In most states 30 days notice is standard, 10 days for nonpayment. It does not give them coverage rights. If the contract requires them to be an additional insured, that status comes from an endorsement on the policy itself, not from appearing in the certificate holder block.

Why COIs Are the Lifeblood of Construction Projects

On any commercial project with multiple trades on site, the GC is exposed to liability from every subcontractor working under them. If an uninsured sub causes an injury or property damage, the GC's policy is often the first target. Requiring a COI from every sub before they mobilize is the minimum standard for risk management on a well-run project. It is also increasingly a contractual and bonding requirement, not a courtesy.

 

Risk Transfer and Professional Credibility

When you hand over a clean COI that meets the project's requirements, you are doing two things at once. You are transferring the financial risk of your operations back to your own insurer rather than leaving it sitting on the GC's policy. And you are signaling that you run your business like a professional. Contractors who cannot produce a COI quickly, or who produce one that does not meet spec, lose jobs to competitors who can. In commercial work especially, the ability to provide proper insurance documentation on short notice is a competitive differentiator.

 

Contractual Obligations and Bidding

Most commercial contracts specify insurance requirements in a dedicated section, often referencing minimum limits for each coverage type, endorsement requirements like additional insured status and waiver of subrogation, and sometimes the specific endorsement form numbers required. Bidding a job without reading that section first is how contractors end up winning a contract and then discovering their current policy limits do not qualify. Review insurance requirements before you bid, not after you win.

When You Will Be Asked to Provide One

The short answer is constantly. Here are the most common trigger points:

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• Before starting any commercial subcontract. The GC will not let you on site without it

• When pulling a permit in states or municipalities that require proof of insurance at the permit counter

• When signing a lease for a commercial shop or yard space

• When bonding a project, the surety will require proof your underlying insurance is in place

• When bidding public work. Most government contracts require COI submission with the bid package

• When a property owner on a residential project asks for it, which is increasingly common on projects above a certain dollar threshold

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For example, a roofing subcontractor working on a commercial project in Texas may be required to provide a certificate of insurance before stepping on the job site, with specific limits tied to the contract value. Texas does not have a single statewide minimum for private commercial work, so the requirements are set by the GC's contract. Getting it wrong still pulls you off the job. You can review the regulatory baseline in our guide to contractor insurance requirements in Texas.

If you do not already have contractor liability insurance in place, most carriers can issue coverage and generate a certificate the same day. Many contractors now purchase policies online and download certificates instantly rather than waiting for a broker to send one manually.

How Fast Can You Get a Certificate of Insurance?

With an active policy in place, most brokers can produce a certificate the same day you request it. If your broker uses a digital portal, you may be able to generate one yourself in under five minutes without any back-and-forth. The bottleneck is almost never the certificate itself. It is getting the underlying policy bound and active first.

Speed slows down when the certificate requires custom endorsements, additional insured language that needs underwriter review, or higher limits than your current policy carries. If you are heading into a commercial project season, get your policy renewed and limits confirmed before the first job kicks off rather than scrambling when a GC sends you a requirements checklist on a Monday morning.