You received a certificate of insurance from a new sub. The limits look right. The dates check out. But is the policy actually active right now?

A contractor insurance lookup goes beyond reading a paper certificate. It confirms the policy exists, the carrier is solvent, and the coverage matches what the sub claims. In 2025, 19% of COIs presented to GCs contained at least one discrepancy between the certificate and the actual policy.

Here is the step-by-step process to verify any contractor's insurance.

Step 1: Start with the State Licensing Board

Every state licensing board maintains a public database of licensed contractors. Most of these databases include insurance information.

What you can find:

Active license status
Workers' compensation carrier and policy number
General liability carrier (in some states)
Bond information
Disciplinary history

California's CSLB, Florida's DBPR, and Texas's TDLR all provide free online lookups. Response time is instant for digital queries.

Limitations: State databases update on a lag. California CSLB data refreshes every 30-60 days. A policy that canceled last week may still show as active.

State	Database	Insurance Info Available	Update Frequency
California	CSLB License Check	WC carrier + policy number	30-60 days
Florida	DBPR Licensee Search	WC + GL carrier info	14-30 days
Texas	TDLR License Search	WC status only	30 days
New York	DOS License Search	Limited insurance data	30-60 days
Georgia	SOS Contractor Search	WC + GL status	14-30 days

Never rely solely on a state database for insurance verification. Use it as the first data point, not the final answer.

Step 2: Verify the Insurance Carrier Through NAIC

The National Association of Insurance Commissioners (NAIC) maintains a database of all licensed insurance companies operating in the United States.

How to use it:

Go to the NAIC Company Search tool
Enter the carrier name from the COI
Confirm the carrier is authorized to write policies in your state
Note the NAIC company code for cross-referencing

Why does this matter? Fraudulent certificates sometimes list fake carriers or carriers not licensed in the relevant state. In 2024, the NICB identified over 3,200 fraudulent COIs in the construction industry alone.

If the carrier does not appear in the NAIC database and is not a recognized surplus lines carrier, the certificate is suspect.

Step 3: Check the Carrier's AM Best Rating

AM Best rates insurance companies on their financial strength and ability to pay claims. A strong rating means the carrier can actually cover losses when they occur.

Minimum acceptable ratings for construction:

Financial Strength Rating: A- or higher (Excellent)
Financial Size Category: VII or higher ($100M+ in surplus)

A sub carrying coverage from a B-rated carrier creates a real risk. If that carrier becomes insolvent during your project, the sub's insurance is effectively worthless.

How to check:

Visit the AM Best website
Search by carrier name or NAIC code
Review both the Financial Strength Rating and the outlook (stable, positive, negative)

In 2025, 14 construction-focused insurance carriers received downgrade notices from AM Best. Three of them entered receivership within 12 months.

Step 4: Contact the Carrier Directly

For high-value subcontracts or any situation where the COI raises questions, call the carrier's policy services department directly.

Information to request:

Policy status (active, canceled, expired, or pending cancellation)
Named insured (confirm it matches the contracting entity)
Policy effective and expiration dates
Per occurrence and aggregate limits
Additional insured endorsements on file
Any pending cancellation or non-renewal notices

Most carriers will confirm or deny basic policy information over the phone when you provide the policy number from the COI. Some require a written request.

Average response time: 1-3 business days for written requests, immediate for phone verification.

Step 5: Use a Certificate Verification Service

Manual verification works for a handful of subs. It breaks down at scale.

Certificate verification services automate the lookup process by connecting directly to carrier databases. They provide real-time policy status and send alerts when coverage changes.

What verification services check:

Policy is active and in force
Limits match contract requirements
Required endorsements are attached
Named insured matches the contracting entity
No pending cancellation or non-renewal

SubcontractorAudit's COI tracking platform runs continuous verification against carrier data. When a sub's policy lapses, you know within hours instead of discovering it at claim time.

Step 6: Validate Endorsements

A COI listing the right limits means nothing if the required endorsements are missing. Endorsements modify the base policy, and three endorsements are non-negotiable for GCs.

Additional insured (CG 20 10 + CG 20 37): Confirms you have coverage rights under the sub's policy for both ongoing and completed operations.

Waiver of subrogation: Prevents the sub's carrier from suing you after paying a claim.

Primary and non-contributory: Ensures the sub's policy pays first.

Request copies of the actual endorsements, not just the certificate notation. The COI is an informational document. It does not grant coverage rights on its own.

Step 7: Cross-Reference Workers' Compensation

Workers' comp verification requires a separate process from GL verification.

State workers' comp databases: Most states maintain a proof-of-coverage database. The National Council on Compensation Insurance (NCCI) covers 38 states. Monopolistic states (Ohio, North Dakota, Washington, Wyoming) have their own state fund databases.

Key checks:

Coverage is active for the correct legal entity
Classification codes match the work being performed
Experience modification rate (EMR) is below your threshold (most GCs cap at 1.25)

An EMR above 1.0 means the sub has worse-than-average loss experience. An EMR above 1.5 signals serious safety issues.

Red Flags During a Contractor Insurance Lookup

Watch for these warning signs during your verification process.

Certificate issued by the contractor, not the agent or carrier. Legitimate certificates come from licensed insurance agents or directly from carriers. A certificate generated by the contractor's office is a forgery risk.

Policy number format doesn't match carrier conventions. Each carrier uses a specific policy number format. If the number looks unusual for the listed carrier, verify directly.

Coverage dates that exactly match your project dates. Legitimate policies have annual terms. A policy that starts and ends on your project dates was likely procured just for the certificate.

Agent contact information leads to a voicemail-only number. Verify the agent is actually appointed with the listed carrier.

Multiple policies from different carriers in different states with the same effective date. This can indicate a broker shopping for the cheapest certificate rather than comprehensive coverage.

Building a Repeatable Contractor Insurance Lookup Process

Document your verification steps into a standard operating procedure. Every new sub should go through the same process.

Pre-qualification phase (before contract signing):

Run state licensing board lookup
Request COI with your specific requirements
Verify carrier through NAIC and AM Best
Check workers' comp status and EMR

Onboarding phase (after contract signing):

Collect endorsement copies (additional insured, waiver of subrogation, primary/non-contributory)
Contact carrier for direct policy verification on contracts over $500,000
Set up automated monitoring for policy status changes
Calendar renewal dates for follow-up

Ongoing monitoring:

Continuous automated verification through your compliance platform
Quarterly manual spot-checks on high-value subs
Immediate verification on any sub involved in an incident

FAQs

How long does a contractor insurance lookup take? Manual verification takes 15-25 minutes per sub for basic checks. Direct carrier verification adds 1-3 business days. Automated platforms like SubcontractorAudit reduce the process to under 2 minutes per sub.

Can I verify a contractor's insurance online for free? State licensing board databases are free. NAIC carrier searches are free. AM Best provides limited free information. Full policy verification typically requires a paid service or direct carrier contact.

What if the contractor refuses to provide insurance information? Do not hire them. A legitimate contractor with proper coverage has no reason to withhold insurance documentation. Refusal is a red flag for either inadequate coverage or fraudulent certificates.

How often should I re-verify a subcontractor's insurance? At minimum, verify at onboarding, at each policy renewal, and quarterly during active projects. Continuous automated monitoring is the gold standard.

Are certificates of insurance legally binding? No. A COI is an informational snapshot. It does not create, modify, or extend coverage. The actual policy governs coverage rights. That is why direct verification and endorsement copies matter more than the certificate itself.

What is the difference between an admitted and surplus lines carrier? Admitted carriers are licensed by the state and participate in the state guaranty fund, which protects policyholders if the carrier becomes insolvent. Surplus lines carriers operate outside the guaranty fund system. Both can provide legitimate coverage, but surplus lines carriers carry additional solvency risk.

Automate your contractor insurance lookup process. See how SubcontractorAudit verifies coverage in real time.