# What is a certificate of insurance (COI), and when will customers ask for one? > It's one page that proves your insurance is real and current. Here's what's on it, who asks for it, and why being named additional insured is a different thing entirely. Source: https://toolbagcrm.com/blog/what-is-a-certificate-of-insurance-coi-when-customers-ask/ Author: The Toolbag Crew Updated: 2026-10-27 A COI proves your coverage is active; additional insured is a different, costlier ask. A certificate of insurance, a COI, is one sheet of paper that says your insurance is real and still in force. It doesn’t pay anybody. It isn’t the policy itself. It’s a summary your agent prints out: who you’re insured with, what you carry, how much, and the dates it runs. Somebody wants proof before they’ll let you on the job, so your agent emails one over, usually same day and usually free. That’s the whole thing. ## What's actually on it The standard form is the ACORD certificate, and it looks the same no matter who sends it. One page. It lists your coverage, your general liability, your workers’ comp, your commercial auto if you carry it, with the dollar limits on each and the policy numbers. Up top are the dates the coverage starts and stops, which is the part most people actually squint at. Down at the bottom sits the certificate holder, meaning whoever you handed the thing to. A snapshot of your policy on one day. It isn’t the policy, and it isn’t a promise nothing changes tomorrow. ## Who asks for one, and when Think about who has something to lose if you burn the place down. General contractors want one before they’ll let you sub under them. Property managers and commercial building owners want one before your boots hit their site. A homeowner on a big remodel might ask, especially once a bank is in the picture. A new commercial account almost always asks before the first job, then again every year after. On a plain residential service call you’ll mostly never see one. Sign a property management company, though, and you’ll be sending certificates until you’re sick of the sight of them. ## The 'additional insured' catch Here’s the one that trips people. Plenty of customers don’t just want to see your COI. They want to be named **additional insured** on your policy, and that is a different animal. A plain certificate only proves you’re covered. An additional insured endorsement actually stretches your coverage over them, so if something you do gets them pulled into a lawsuit, your policy answers for it. That one isn’t free. Your carrier has to add it, sometimes for a fee, and it changes the policy itself. So read the contract before you forward anything. If it says name us as additional insured, a bare certificate won’t cut it, and you can’t just type their name on the form and hope. > A certificate proves you're covered. Additional insured means your coverage now protects them too. Customers ask for both and mean very different things. ## How to not get caught flat-footed ### Keep this from stalling a job - **Know your agent's turnaround**: Some send a COI in an hour, some take two days. Find that out before a customer is standing around waiting on one. - **Keep a current one on file**: Have a fresh certificate ready to forward so you're not starting the request from zero every single time. - **Read what the contract really wants**: A certificate and an additional insured endorsement are not the same ask. Only one of them costs you money. - **Watch your own expiration dates**: A COI dated past its expiration is worthless. Renew before it lapses, not after a customer flags it. - **Save every one you send**: Tie each certificate to the customer it went to. When they ask again in six months, you forward instead of hunt. ## Where ToolbagCRM fits A COI goes stale the day your policy renews. The one you sent a property manager in January is useless to them by July, and the job that stalls is always the one where somebody’s chasing a current certificate while the crew sits in the truck. The paperwork is the real problem here, not the insurance. Keep the customer’s requirements and their documents on the account, and that scramble mostly disappears. In ToolbagCRM the certificate you sent lives on the customer record right next to their jobs and invoices, so when a property manager asks for a fresh one you pull up what went out last time and know exactly what they need. You can [get started](https://app.toolbagcrm.com/signup/) free with no card, and Founders is free the first month, then a flat base rate with unlimited users. [See plan terms, plug-in slots, and payment fees.](https://toolbagcrm.com/pricing/) > This is a plain explanation, not insurance or legal advice. Coverage types, limits, and endorsements vary by policy and by state. Your insurance agent or broker is the one who should tell you what you carry and what a specific contract requires. - [Field service management software](https://toolbagcrm.com/field-service-management-software/) - [get started](https://app.toolbagcrm.com/signup/) - [HVAC CRM](https://toolbagcrm.com/crm-for-hvac/) - [Plumbing CRM](https://toolbagcrm.com/crm-for-plumbers/) - [Electrician CRM](https://toolbagcrm.com/crm-for-electricians/) - [Roofing CRM](https://toolbagcrm.com/crm-for-roofers/) - [Field service CRM](https://toolbagcrm.com/field-service-crm/) ## Frequently asked questions ### What is a certificate of insurance (COI)? A COI is a one-page document from your insurance agent that proves your policies are active. It lists your coverage types, limits, policy numbers, and expiration dates. It's proof of insurance, not the policy itself, and it doesn't pay claims. ### When will customers ask a contractor for a certificate of insurance? General contractors, property managers, commercial property owners, and new commercial accounts usually ask before you start work, and often every year after. Straight residential service calls rarely require one. ### How do I get a certificate of insurance? Ask your insurance agent or broker. Most issue a COI the same day at no charge, and you can have them send it straight to the customer who requested it. ### What's the difference between a certificate of insurance and additional insured? A certificate just proves you're covered. Naming a customer as additional insured extends your policy to protect them too, which your carrier has to add and may charge for. Check the contract, because the two are different requests. ## Related resources - [Field service management software](https://toolbagcrm.com/field-service-management-software/) - [What is a lien waiver, and when does a contractor need one?](https://toolbagcrm.com/blog/what-is-a-lien-waiver-and-when-does-a-contractor-need-one/) - [Insurance basics: general liability, workers comp, and what you actually need](https://toolbagcrm.com/blog/insurance-basics-for-trades-general-liability-workers-comp/) - [Licenses and permits: what you need before your first job](https://toolbagcrm.com/blog/licenses-and-permits-before-your-first-job/) - [Founders pricing](https://app.toolbagcrm.com/signup/)