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Certificates of Insurance Explained

Learn what a Certificate of Insurance is, what's included, how to get one instantly, and the critical difference between certificate holders and additional insureds.

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Published November 6, 2025

Key Takeaways

  • A Certificate of Insurance (COI) is a free, one-page document that proves your business has active insurance coverage—clients and vendors often require it before you can start work.
  • Your COI lists critical details including your coverage types, policy limits, effective dates, and the names of any additional insureds, but it's not the same as your actual insurance policy.
  • Being listed as a certificate holder on someone's COI doesn't give you coverage—you need to be named as an additional insured to actually have protection under their policy.
  • Most insurance companies let you generate unlimited COIs instantly through online portals at no additional cost, making it easy to provide proof of coverage whenever needed.
  • COIs are typically valid only for the policy period shown on the certificate, so you'll need to provide updated certificates when your policy renews.
  • Requesting a COI from vendors or contractors protects your business by verifying they have adequate coverage before they work on your premises or projects.

You've landed a new client, signed the contract, and you're ready to start work. Then you get an email: "Please provide a Certificate of Insurance before we can proceed." If you're scratching your head wondering what that means, you're not alone. Certificates of Insurance—or COIs—are one of those business essentials that nobody explains until you desperately need one.

Here's the good news: COIs are simple, free, and you can usually get one in minutes. They're basically your insurance company's way of saying "Yes, this business has coverage" in a standardized format that clients, landlords, and vendors can quickly verify. Let's break down everything you need to know.

What Exactly Is a Certificate of Insurance?

Think of a Certificate of Insurance as a snapshot of your business insurance. It's a one-page document that summarizes your coverage without giving away all the detailed terms and conditions of your actual policy. Your COI proves to third parties that you have active insurance and shows them the basics: what's covered, how much coverage you have, and when it expires.

Here's what's important to understand: a COI isn't the insurance policy itself. It doesn't extend coverage to anyone, and it doesn't change your policy terms. It's strictly proof that coverage exists. Your actual insurance policy is a much longer, legally binding document with all the fine print. The COI is just the highlight reel.

What Information Is Included on a COI?

Every Certificate of Insurance follows a standard format, which makes them easy to read once you know what you're looking at. Here's what you'll find:

Your insurance company's name and contact information sits at the top, along with your insurance agent or broker's details. Then comes your business information—your company name and address as the policyholder. The meat of the certificate lists each type of coverage you carry. For most businesses, this includes general liability insurance, and might also show commercial property, workers' compensation, commercial auto, or professional liability coverage depending on what you have.

For each coverage type, the COI shows the policy number, effective dates (when coverage starts and ends), and your coverage limits. These limits are critical—they tell the certificate holder the maximum amount your insurance will pay for different types of claims. You'll see numbers like "$1,000,000 per occurrence" or "$2,000,000 aggregate," which indicate your policy's financial boundaries.

The certificate also has a section called "Certificate Holder"—that's where the name and address of whoever requested the COI goes. This is usually your client, a property owner, or a general contractor you're working with. Finally, there's space to list any additional insureds, which we'll get to in a moment because that's where things get interesting.

Certificate Holders vs. Additional Insureds: A Critical Difference

This is where a lot of business owners get confused, and it's genuinely important to understand the distinction. Being listed as a certificate holder on someone's COI is not the same as being an additional insured. Not even close.

A certificate holder is simply the recipient of the COI—the person or business that asked for proof of insurance. Being a certificate holder gives you exactly one thing: confirmation that the other party has coverage. That's it. You can't make claims under their policy. You don't receive any protection from their insurance. You're just informed if the policy gets cancelled or changes.

An additional insured, on the other hand, is actually covered under someone else's policy. If you're named as an additional insured on a contractor's general liability policy and someone gets injured during their work at your property, you could file a claim under their insurance. This provides real financial protection. Most savvy businesses require their vendors and contractors to add them as additional insureds, not just certificate holders, specifically because of this protection.

Adding someone as an additional insured requires an endorsement to your actual insurance policy—it's not automatic and it's not something you can just write on a COI. You need to contact your insurance agent to add an additional insured endorsement, which may involve a small fee or adjustment to your premium depending on your insurer and policy type. Some policies include blanket additional insured endorsements that automatically cover anyone you've contractually agreed to add, which makes the process much smoother if you frequently work with clients who require this.

How to Request Your Own Certificate of Insurance

The best part about COIs? They're completely free and usually instant. Most modern insurance companies offer online portals where you can generate certificates 24/7 without waiting for your agent. Log into your account, click on certificates or proof of insurance, fill in the certificate holder's information, and download or email it immediately. The whole process takes less than five minutes.

If you don't have online access or prefer talking to a human, you can call your insurance agent or broker. You'll need to provide the policy number, the certificate holder's name and address, and any special requirements they've requested. Your agent can typically email you the COI within a day, though many can turn them around in hours if you're in a rush.

One thing to keep in mind: you can generate unlimited COIs for free, so don't hesitate to request them whenever needed. Some businesses create new certificates for each project or client, while others provide them to landlords, venues, or partners. There's no limit or charge for requesting multiple certificates from the same policy.

How to Request a COI From Vendors or Contractors

Now let's flip the script. What if you need to request a Certificate of Insurance from someone working for you—a contractor, vendor, or service provider? This is actually a smart business practice that protects you from liability if something goes wrong during their work.

Be specific about what you need. Tell them the minimum coverage amounts you require (like $1 million in general liability), what types of coverage are necessary (general liability, workers' comp, auto if they're driving), and whether you need to be listed as an additional insured. Give them your business name and address exactly as you want it to appear on the certificate.

When you receive the COI, actually review it—don't just file it away. Check that the coverage types and limits meet your requirements, verify the policy is currently active by looking at the effective dates, confirm your business is listed correctly as the certificate holder (and as additional insured if you requested it), and make sure the vendor's information matches who you're actually contracting with. It sounds basic, but you'd be surprised how often certificates have wrong information or outdated policies listed.

Keep copies of all COIs you receive in a organized system with expiration date reminders. When a vendor's policy is about to expire, request an updated certificate. If they let their coverage lapse and something happens during a project, you could face serious exposure.

Common Situations Where You'll Need a COI

Understanding when COIs come into play helps you anticipate requests and have them ready. Clients and customers often request COIs before starting major projects or contracts—they want confirmation you're properly insured before you begin work that could expose them to liability. Commercial landlords almost always require COIs before you sign a lease or move into a space, and they'll want to be listed as additional insureds in case your business operations cause damage or injury on the property.

If you're a subcontractor, general contractors will require COIs showing adequate coverage before letting you on a job site. Event venues and trade shows typically require certificates proving you have liability coverage for your booth or participation. Government contracts almost always involve COI requirements, often with very specific coverage amounts and additional insured provisions. Some professional licenses and permits may require proof of insurance through a COI as well.

Getting Started With Certificates of Insurance

If you don't have business insurance yet, that's step one—you can't get a COI without an active policy. Talk to an insurance agent about what coverage types your business needs based on your industry and risk factors. General liability is the foundation that most COI requests focus on, but you may also need workers' compensation, professional liability, or commercial auto depending on your operations.

Once you're insured, set up online access to your insurance account if your carrier offers it. This lets you generate certificates instantly whenever a client asks, which is far more convenient than calling your agent every time. Keep your policy information handy—you'll need policy numbers and coverage details to create certificates.

Certificates of Insurance might seem like bureaucratic paperwork, but they serve a real purpose in the business world. They provide quick, standardized proof that everyone involved in a project or relationship has the coverage they need. Now that you understand what COIs are, what they contain, and how to get them, you'll be ready the next time a client, landlord, or partner asks for one. And remember: having proper insurance isn't just about satisfying certificate requests—it's about protecting your business from financial disasters that could otherwise put you out of business entirely.

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Frequently Asked Questions

How much does it cost to get a certificate of insurance?

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Certificates of Insurance are completely free. Your insurance company provides unlimited COIs at no charge as long as you have an active policy. However, you must have business insurance in place first—the COI is just proof of existing coverage, not coverage itself.

How long does it take to get a certificate of insurance?

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Most insurance companies offer instant COIs through online portals where you can generate and download certificates in less than five minutes. If you request one through your agent by phone or email, you'll typically receive it within 24 hours, though many agents can provide them within a few hours if needed.

Is a certificate of insurance the same as an insurance policy?

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No, a COI is not the same as your insurance policy. The certificate is a one-page summary that proves you have coverage and shows basic details like policy numbers, limits, and effective dates. Your actual insurance policy is a comprehensive legal document with all the terms, conditions, exclusions, and fine print that govern your coverage.

What's the difference between a certificate holder and an additional insured?

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A certificate holder is simply the recipient of the COI who receives proof that you have insurance—they have no coverage under your policy. An additional insured is actually protected by your insurance policy and can file claims under it, which requires a formal endorsement to your policy and provides them with real financial protection.

How long is a certificate of insurance valid?

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A COI is valid for the policy period shown on the certificate, typically one year from the policy's effective date. When your insurance policy renews, you'll need to provide updated certificates showing the new policy period and any changes to coverage or limits.

Can I make changes to a certificate of insurance myself?

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No, you cannot alter or modify a COI yourself—doing so could be considered insurance fraud. All certificates must be issued directly by your insurance company or authorized agent. If something is incorrect on a certificate, contact your agent to have them issue a corrected version.

We provide this content to help you make informed insurance decisions. Just keep in mind: this isn't insurance, financial, or legal advice. Insurance products and costs vary by state, carrier, and your individual circumstances, subject to availability.

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