If you work in the contracting world, you’ve probably been asked for a certificate of insurance more times than you can count. Clients want them. General contractors require them. Property owners won’t let you on-site without one. But despite how common they are, many contractors don’t fully understand what these documents actually do — and don’t do.
Here’s what you need to know.
What Is a Certificate of Insurance?
A certificate of insurance (COI) is a one-page summary document that proves you carry insurance coverage. It lists key details about your policies — coverage types, limits, effective dates, and the name of your insurer.
The most common coverage listed on a contractor’s COI is general liability insurance, which protects against third-party claims of bodily injury, property damage, and related legal costs. You may also see workers’ compensation, commercial auto, and umbrella policies listed.
Think of a COI as a snapshot. It shows what your coverage looks like at a specific point in time.
What a COI Does NOT Do
This is where a lot of contractors get confused — and where problems arise.
A certificate of insurance is not a contract. It does not modify, extend, or alter your actual insurance policy in any way. If a client asks you to list them as an “additional insured” or requests higher coverage limits than you carry, simply having those details typed onto a COI doesn’t make them true or enforceable unless your actual policy reflects those changes.
Always verify with your insurer that any special requests — like additional insured endorsements — are actually added to your policy, not just written on the certificate.
Why Clients and General Contractors Require Them
Hiring parties require COIs because they want to confirm that if something goes wrong on the job, your insurance — not theirs — responds first. If a worker is injured on their property, or if you accidentally damage a client’s home, your general liability insurance is what covers those claims.
Without proof of coverage, they’re taking on a financial risk by hiring you. A valid COI transfers that risk back to you where it belongs.
Common COI Requirements You Should Expect
Before stepping onto a job site, review what the hiring party is asking for. Common requirements include:
- Minimum coverage limits — Many commercial clients set a floor for how much general liability coverage you must carry
- Additional insured status — The client or property owner may want to be named on your policy
- Notice of cancellation — Some contracts require your insurer to notify them if your policy is cancelled
- Specific policy types — Larger projects often require workers’ comp, commercial auto, or umbrella coverage in addition to general liability
Reading through these requirements before signing a contract saves you from scrambling at the last minute — or worse, losing the job because your coverage doesn’t qualify.
How to Get a Certificate of Insurance
Getting a COI is straightforward. Contact your insurance agent or broker, provide the name and address of the requesting party, and ask for the certificate to be issued. Most agents can turn these around quickly.
If additional insured endorsements or other modifications are needed, communicate that early. Those changes may take more time to process and require underwriter approval.
Keep Your Coverage Current
A COI is only as good as the policy behind it. Make sure your general liability insurance is active and adequate for the type of work you do. Review your limits annually, especially if your business has grown or you’re taking on larger projects.
Letting your coverage lapse — even briefly — can cost you jobs and expose you to serious financial risk.
Understanding certificates of insurance isn’t just administrative paperwork. It’s part of running a professional, protected contracting business.
