Certificate of insurance for contractors — fast COI guide

A certificate of insurance (COI) for contractors is a one-page document that proves an active insurance policy — showing the carrier, policy number, coverage limits, effective dates, and the parties named — and is required by virtually every commercial customer, property management company, and municipal contract before a contractor can start work. Modern COIs use the standard ACORD 25 form (general liability) or ACORD 125 (business auto) with specific endorsements like additional insured and waiver of subrogation listed in the description box (verified April 2026 via ACORD Corporation forms library and The Hartford / Travelers / Liberty Mutual published COI examples). A properly issued COI gets contractors onto jobs in hours, not days; a sloppy one gets flagged and delays the start.

This guide covers what's on a COI, what customers verify, how to issue one fast from each major carrier, and the common endorsements customers demand.

What's on a standard COI

The ACORD 25 General Liability COI is a single page with eight sections:

1. Producer (insurance agent or broker). Name, address, contact info of the agent who placed the policy. This is who a customer calls to verify coverage.

2. Insured (your company). Your legal business name and address, exactly as it appears on the policy.

3. Insurer(s). The carrier(s) writing each policy. Each carrier is assigned a NAIC number.

4. Policy types. Four main coverages listed on a standard contractor COI:

Commercial General Liability (CGL)
Commercial Auto Liability
Workers' Compensation
Umbrella / Excess Liability (if applicable)

5. Policy numbers. Each policy's unique identifier.

6. Effective / expiration dates. When coverage starts and ends for each policy.

7. Limits of liability. The dollar coverage amounts. For GL, typically shown as:

Each Occurrence: $1,000,000
Damage to Rented Premises: $100,000
Med Exp (Any one person): $10,000
Personal & Adv Injury: $1,000,000
General Aggregate: $2,000,000
Products-Completed Ops Aggregate: $2,000,000

For Commercial Auto:

Combined Single Limit: $1,000,000

For Workers' Comp:

Statutory limits in the employer liability section ($1M/$1M/$1M is standard)

8. Description of operations / certificate holder / additional insured box. The free-text field where special endorsements, project descriptions, and certificate holder information are listed.

What customers actually verify

Not every customer reads the COI carefully. Large commercial customers and property management companies verify five things:

1. Carrier rating. Is the carrier rated A- or better by AM Best? Customers reject COIs from unrated or lower-rated carriers. Rated A (Excellent) or A+ is the practical minimum.

2. Coverage limits. Does the policy meet the contractual minimum? Most commercial contracts require $1M per occurrence / $2M aggregate for GL, $1M combined single limit for commercial auto, and statutory workers' comp. Higher-risk jobs require $2M/$4M or umbrella coverage.

3. Effective dates. Is the policy in effect for the duration of the job? Expired policies or policies expiring mid-project trigger immediate rejection.

4. Additional insured endorsement. Is the customer named as additional insured on the GL policy? The COI description box should say something like: "Certificate holder is included as additional insured for ongoing and completed operations as required by written contract per form CG 20 10 04 13 and CG 20 37 04 13."

5. Waiver of subrogation. Many commercial contracts require the contractor's carriers to waive the right to sue the customer for the carrier's paid claims. The waiver is listed in the description box referencing specific form numbers.

Common endorsements customers require

Additional insured (AI). Extends the contractor's GL coverage to include the customer for claims arising from the contractor's work. Customers require this to protect themselves from being sued directly by injured third parties. Standard forms:

CG 20 10 — ongoing operations only (during work)
CG 20 37 — products-completed operations (after work done)
CG 20 38 — blanket additional insured (named automatically per contract)

Waiver of subrogation. Contractor's carrier gives up the right to sue the customer to recover claim payments. Required by most property management agreements, school contracts, and construction contracts. Listed on the COI by form number (typically CG 24 04 or WC 00 03 13).

Primary & non-contributory. Contractor's policy pays first in a claim, without forcing the customer's own insurance to contribute. Standard form: CG 20 01.

Per-project aggregate. Each project gets its own aggregate limit, so a large claim on one project doesn't exhaust coverage for others. Required on larger commercial contracts.

Notice of cancellation. Customer is notified if the contractor's policy is canceled. Most carriers issue 30-day notice as standard; some contracts require 60 or 90 days.

How to get a COI from each carrier

Online-first carriers (Thimble, Next Insurance, Simply Business):

Log into your carrier dashboard
Click "Certificate of Insurance" or "Issue COI"
Enter certificate holder name and address
Select required endorsements (AI, waiver of subrogation, primary & non-contributory)
Download/email the PDF
Total time: 2–5 minutes

Next Insurance offers a "Live Certificate" — a URL you share with the customer that always reflects current policy status. Thimble offers instant PDF generation and unlimited free COIs.

Agent-placed carriers (The Hartford, Travelers, Chubb, Liberty Mutual):

Email or call your insurance agent with the customer's name, address, and required endorsements
Agent requests the COI from the carrier's COI system
Most agents issue within 2–4 business hours; complex endorsements can take 24–48 hours
Standard COIs are free; complex endorsements sometimes carry a $25–$150 endorsement fee

Assigned-risk / residual market policies:

COIs route through the assigned carrier, typically 24–72 hour turnaround
Limited endorsement flexibility — some endorsements aren't available

Typical COI costs

A basic COI with no special endorsements is free on modern policies. Expect costs for:

Endorsement	Typical cost
Additional insured (standard CG 20 10)	Free on most policies
Additional insured (completed operations CG 20 37)	Free–$100 per endorsement
Blanket additional insured (CG 20 38)	$250–$1,000 annually
Waiver of subrogation	Free–$150 per endorsement
Primary & non-contributory	Free–$250 per endorsement
Per-project aggregate	$500–$2,500 annually
Umbrella policy certificate	Free (issued alongside underlying policy)

Most solo and small contractors have blanket additional insured endorsements built into their annual policy, eliminating the per-certificate fee. Verify with your carrier before your first commercial job.

The ACORD form versions

COIs use standardized ACORD forms. Current versions as of April 2026:

ACORD 25 — Certificate of Liability Insurance (general liability, auto, workers' comp, umbrella)
ACORD 27 — Evidence of Property Insurance (for customers requiring proof of property coverage)
ACORD 101 — Additional Remarks Schedule (overflow continuation sheet)
ACORD 125 — Commercial Insurance Application (COIs for business auto)

Customers accustomed to older ACORD 25 versions (2010, 2014) may ask why your COI looks different — the form updates every 4–6 years. Current version as of April 2026 is ACORD 25 (2016/09), still in effect.

Common rejection reasons

Customers reject COIs for these issues, in decreasing frequency:

1. Wrong certificate holder name. Exact legal entity name matters — "Smith Properties LLC" is different from "Smith Properties, Inc." Confirm the legal name from the customer before issuing.

2. Missing additional insured endorsement. COI lists GL policy but description box doesn't mention the customer as AI. Biggest reason for same-day rejection on commercial jobs.

3. Wrong coverage limits. Contract requires $2M aggregate; COI shows $1M. Upgrade the underlying policy or get a quick umbrella policy to cover the gap.

4. Expired policy. Quote date was before renewal, COI auto-generated against old policy. Re-issue against current policy.

5. Wrong policy form reference. Description box references "CG 20 10 10 01" (old form) instead of "CG 20 10 04 13" (current). Customers' procurement systems flag this automatically.

6. Missing waiver of subrogation. Contract required it; COI doesn't list it. Request endorsement from carrier, re-issue COI.

7. Missing signature or date on COI. Most ACORD forms are computer-generated and don't require signature, but some customers require the producer's manual signature and date.

8. Wrong insured name. Contractor COI issued under personal name or DBA when contract is with LLC. Match the legal entity on contract.

Typical COI issuance workflow

For a first-time commercial customer:

Customer sends you the contract or asks for proof of insurance
Customer specifies: certificate holder name + address, coverage limits required, and any specific endorsements
You forward the request to your insurance agent or log into your carrier's COI portal
Agent or portal generates COI with required endorsements
COI emails/PDFs to you and directly to the customer
Customer procurement reviews, approves (or rejects with feedback)
You save a PDF copy in your CRM or job folder for the project duration
Policy renews 12 months later; if the customer has an ongoing contract, issue updated COI

For repeat customers, most carriers offer "continuous COI" options that auto-renew annually at no charge.

Common questions

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

From online carriers (Thimble, Next, Simply Business): 2–5 minutes. From agent-placed carriers: 2 business hours to 2 business days depending on endorsements. Rush requests with no endorsements can often be same-day.

Do I need a new COI for each job?

Usually yes, because each customer needs their specific name listed as the certificate holder. Some contractors with blanket additional insured endorsements can use a single COI that covers all customers contractually named elsewhere. Most commercial customers still want a specific COI with their name on it.

Can I issue a COI to myself?

You can't legally issue one — your carrier or agent has to produce it from their system. But you can request one for your own records at any time.

What if I'm asked for a COI but don't have insurance?

Get insurance before taking the job. Online carriers (Thimble, Next) can bind coverage in 15–30 minutes and issue a COI the same day. Working without insurance on a commercial job is financially and legally reckless.

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

No. The COI is a summary of the policy for third-party verification. The actual policy is a 20–80 page document with all the coverage terms, exclusions, and conditions. A customer auditing your compliance might occasionally request a full policy copy; most accept the COI alone.

Can someone verify a COI without calling my carrier?

Yes. Several verification services (like CertFocus, EvolveMGA, and EveryConnection) maintain databases that customers use to verify active coverage. Some commercial customers also verify coverage directly through ACORD's e-Certs platform.

How do I get a blanket additional insured endorsement?

Request it from your carrier at policy quote or renewal. Some carriers include it free; others charge $250–$1,000 annually. It covers any customer you contract with automatically, eliminating the need to name each one individually.

Related guides

Next step for contractors entering commercial work: ask your insurance agent or online carrier to add a blanket additional insured endorsement to your GL policy. This lets you issue COIs to any customer instantly without per-certificate fees or customer-by-customer endorsement requests. The $250–$1,000 annual cost pays for itself on the second commercial job.