Certificate of Insurance (COI) Explained: How to Get One Fast

Sooner or later a client, landlord, or general contractor will tell you they need a certificate of insurance before you can start work. For many small-business owners it is the first time they have heard the term, and the request often arrives with a deadline attached. The good news is that a COI is a simple document, it is almost always free, and with the right insurer you can produce one in a few minutes.

This guide explains what a certificate of insurance is, what the people requesting it are actually looking for, what terms like additional insured and waiver of subrogation mean, and the fastest way to get one. If you do not have a policy yet, the top-rated business insurance companies we review can quote coverage online and issue a certificate the same day.

What Is a Certificate of Insurance?

A certificate of insurance is a one-page summary of your business insurance policies. It shows who insures you, which coverages you carry, your policy numbers, your limits, and your policy dates. Most certificates in the United States use a standardized form called the ACORD 25, the Certificate of Liability Insurance, which every major carrier and agency can generate.

The certificate is issued by your insurer or agent, not by you. It is addressed to a specific third party, called the certificate holder, who wants evidence that you are insured. Think of it as the business equivalent of the insurance card you keep in your car: it proves coverage exists at a point in time, but it is not the policy itself.

What a Standard COI Includes

• Producer: The agency or carrier that issued the certificate and who to contact with questions
• Insured: Your business name and address, exactly as it appears on the policy
• Insurers affording coverage: The carrier behind each policy, with its NAIC number
• Coverages: Rows for general liability, automobile liability, umbrella or excess liability, workers' compensation, and a blank row for other policies such as professional liability
• Policy numbers, effective dates, and expiration dates for each coverage
• Limits: Per-occurrence and aggregate limits, plus sublimits such as damage to rented premises and medical expenses
• Additional insured and waiver of subrogation columns: Marked with an X when those endorsements apply to the certificate holder
• Description of operations: A free-text box for the project name, location, and any specific contract language the holder requested
• Certificate holder: The name and address of the party requesting the certificate

Why Clients, Landlords, and General Contractors Ask for One

Anyone who lets you work on their property, under their contract, or alongside their customers is taking on some of your risk. If your employee damages a client's building or a customer is injured by your work, the client may be sued too. A COI lets them confirm, before the work starts, that your insurance will respond rather than theirs.

The most common situations where you will be asked for a certificate include:

• Commercial leases: Landlords require general liability and often property coverage before handing over keys, and again at every renewal
• Subcontracting: General contractors collect COIs from every sub on a job site and usually require additional insured status and workers' compensation
• Client contracts: Corporate clients, hospitals, school districts, and government agencies require certificates from vendors and consultants as part of onboarding
• Events and venues: Caterers, photographers, and vendors at markets or festivals must show liability coverage to the venue
• Licensing: Several states require contractors to file proof of insurance with the licensing board
• Loans and equipment financing: Lenders want proof that financed equipment is insured

For contractors specifically, COIs are part of nearly every bid. Our guide to business insurance for contractors covers the coverages general contractors most often require from their subs.

What a COI Is Not

Misunderstanding the certificate causes problems on both sides of the request, so it is worth being precise.

• It is not a policy: The certificate summarizes coverage. The actual terms, exclusions, and conditions live in the policy and its endorsements.
• It does not change coverage: The ACORD 25 states in its own disclaimer that it confers no rights on the holder and does not amend, extend, or alter the policy. Typing a requirement into the description box does not make it covered.
• It is not proof at claim time: The insurer will look at the policy and endorsements when a claim arrives, not at the certificate.
• It is a snapshot: A certificate is accurate only on the day it is issued. If you cancel the policy the next week, the holder may never know unless they are entitled to notice.

This is why sophisticated certificate holders ask for a copy of the actual endorsement, not just a checked box, when additional insured status matters to them.

Additional Insured Explained

The most common add-on requested with a COI is additional insured status. When you add a client, landlord, or general contractor as an additional insured on your general liability policy, your policy will defend and indemnify them for claims that arise out of your work. If a visitor is injured by scaffolding your crew set up and sues the property owner, the owner can tender that claim to your insurer instead of their own.

Additional insured status is created by an endorsement to your policy, not by the certificate. Your insurer either adds the specific party by name or, more commonly for small businesses, includes a blanket additional insured endorsement that automatically covers anyone you are required by written contract to add. Blanket endorsements are the practical choice because they let you issue certificates immediately without calling the insurer for every new client.

Endorsement Forms You Will See Referenced

• CG 20 10: Covers the additional insured for your ongoing operations at the job
• CG 20 37: Extends coverage to completed operations, meaning claims that arise after the work is finished. Construction contracts usually require both.
• CG 20 26: A broader form that names a designated person or organization without limiting to a specific project
• CG 20 11: Used for landlords, covering the manager or lessor of premises you rent

Adding a blanket additional insured endorsement typically costs nothing to a few hundred dollars per year depending on the carrier and your industry. Adding parties one at a time can cost $25 to $100 per endorsement with some insurers, so if you expect frequent requests, ask for blanket wording when you buy the policy.

Waiver of Subrogation and Other Common Requests

Beyond additional insured status, contracts often ask for several other provisions that appear on or alongside the certificate:

• Waiver of subrogation: Normally, after your insurer pays a claim, it can pursue whoever caused the loss to recover the money. A waiver gives up that right against the certificate holder. It is most often requested on workers' compensation and general liability policies, and like additional insured status it requires an endorsement (CG 24 04 for general liability, WC 00 03 13 for workers' comp).
• Primary and noncontributory: Requires your policy to pay first and in full before the holder's own insurance contributes anything. Most contractor contracts include it.
• Notice of cancellation: The holder wants to be told if your policy cancels. Standard policies only promise notice to the named insured, so this also requires an endorsement.
• Specific limits: $1 million per occurrence and $2 million aggregate is the most common requirement. Larger clients may require a $2 million to $5 million umbrella on top.
• Specific coverages: Professional liability for consultants, cyber liability for anyone handling data, pollution liability for certain trades, and hired and non-owned auto for anyone driving on the job.

If a contract requires something your policy does not include, the correct response is to add the endorsement or coverage, not to have the certificate say something the policy does not support. Understanding the difference between general liability and professional liability helps here, because clients frequently ask for both and many small businesses carry only one.

How to Get a COI in Minutes

How fast you can produce a certificate depends almost entirely on how your insurer handles requests. Here is the process step by step.

Step 1: Read the Request Carefully

Get the exact legal name and mailing address of the certificate holder, the required limits, any endorsement language (additional insured, waiver, primary and noncontributory), and any project description they want in the operations box. Most delays come from certificates that had to be reissued because a name or address was wrong.

Step 2: Confirm Your Policy Meets the Requirements

Compare the request with your declarations page. If your limits are too low or you lack a required endorsement, contact your insurer before issuing anything. Raising general liability limits or adding a blanket additional insured endorsement can usually be done the same day.

Step 3: Generate the Certificate

• Digital-first insurers: Carriers such as NEXT Insurance and Hiscox let policyholders log in, enter the holder's details, and download or email a certificate instantly, at no cost and with no limit on how many you create. The Hartford offers a similar self-service option through its online account.
• Traditional agencies: If you bought through an independent agent, email the request with all details. Most agencies turn certificates around within one business day, though busy periods can stretch to two or three.
• Direct carriers by phone: Some insurers still process certificates through a service center, which typically takes 24 to 48 hours.

Step 4: Send It and Keep a Copy

Send the PDF to the holder, keep a copy in your records, and note the policy expiration date. Many holders will ask for a renewal certificate automatically each year, and a lapse can pause your payments or your access to a job site.

Certificates are free from nearly every insurer. If an agency charges a fee for routine certificates, that is a reason to consider switching to one of the best business insurance companies for small businesses, most of which now offer instant self-service certificates as a standard feature.

How to Read a COI You Receive From a Vendor

If you hire subcontractors, vendors, or event suppliers, you should be collecting certificates from them. Use this checklist when one arrives:

• Check the insured's name: It should match the business you contracted with exactly, not an owner's name or a similar company
• Check the dates: The policy must be in force for the entire period of the work. Set a reminder for the expiration date.
• Check the limits: Compare per-occurrence and aggregate limits against your contract. Note that the aggregate is shared across all of the vendor's claims that year, not reserved for you.
• Check the workers' comp row: If a vendor has employees and the workers' comp row is blank, you may be exposed to their injuries under many state laws
• Look for endorsement form numbers: A checked additional insured box is a claim, not proof. Ask for a copy of the endorsement if the relationship matters.
• Verify the carrier: Look up the insurer's financial strength rating. An A-rated carrier is the standard expectation.
• Be suspicious of edits: A certificate should come from the agency or carrier. Certificates that appear altered or that were produced by the vendor themselves are a red flag.

Collecting certificates you never read is one of the more common oversights we cover in our guide to common business insurance mistakes, and it is an easy one to fix.

Next Steps

A certificate of insurance is a simple document, but it sits at the center of how small businesses prove they are safe to work with. The certificate itself is free and fast. The part that takes planning is making sure your policy actually contains the limits and endorsements that your clients will ask for, so that every certificate you issue is backed by real coverage.

If you are buying a policy for the first time, prioritize an insurer with blanket additional insured wording, $1 million per occurrence limits, and instant online certificates. Our reviews of the top-rated business insurance companies of 2026 compare exactly those features so you can get insured, get your certificate, and get to work.