COI for Contractors: Requirements and How to Get One

If you're a contractor, you've probably been asked for a certificate of insurance more times than you can count. Maybe you've lost a job because your COI was expired. Maybe you've scrambled to get one at the last minute while a general contractor waited impatiently on the phone.

Here's the truth: a COI isn't just paperwork. It's the proof that your business is protected, and it's the gatekeeper to getting on job sites. Without a valid COI, you don't work. Period.

This guide breaks down everything contractors need to know about certificates of insurance — what they are, what coverage you need, what limits are standard, how to get one, and the mistakes that cost contractors jobs and money.

What Is a Certificate of Insurance for Contractors?

A certificate of insurance for contractors is a standardized document that proves your business carries active insurance coverage. It summarizes the key details of your insurance policies — the types of coverage, limits, effective and expiration dates — without revealing the full policy terms.

Think of it as your insurance resume. When a general contractor, property manager, or project owner hires you, they need proof that you're covered. The COI is that proof.

Most contractors use the ACORD 25 form, which is the industry-standard certificate of insurance in the United States. It's a single page that shows:

Your name and address — the insured party (you)
Your insurance agent or broker — the producer who issued the certificate
Policy types — general liability, workers' compensation, auto liability, umbrella, professional liability, etc.
Coverage limits — per occurrence, aggregate, and any sub-limits
Effective and expiration dates — the policy window
Certificate holder — the entity requiring the COI (usually the GC or PM)
Additional insured status — whether the GC or PM is covered under your policy

The COI doesn't modify your policy. It doesn't create new coverage. It simply proves that coverage exists. For a deeper dive into what a COI is and how to read one, see our full guide on what is a certificate of insurance.

What Insurance Do Contractors Need?

Not every contractor needs the same insurance. The coverage you need depends on your trade, the projects you take on, and the requirements of whoever is hiring you. But there are four core types of insurance that come up again and again.

General Liability (GL)

General liability covers third-party claims for bodily injury, property damage, and personal/advertising injury. If a visitor trips over your tools and breaks their arm, general liability pays for their medical bills. If you accidentally damage a client's finished flooring, general liability covers the repair.

This is the most universally required policy. Every general contractor, property manager, and project owner will ask for it. The standard COI requirement is $1 million per occurrence and $2 million aggregate.

Workers' Compensation

Workers' compensation covers your employees' medical expenses and lost wages if they're injured on the job. It's the policy that protects you from lawsuits when a worker gets hurt.

In most states, workers' compensation is required by law if you have employees. The specific threshold varies — more on that in the state-specific section below. Coverage limits are set by the state and are referred to as "statutory," meaning they meet whatever the state mandates.

Auto Liability

Auto liability covers vehicles you use for business — your work truck, your van, your equipment trailer. If you're driving to a job site and cause an accident, this policy covers the damage.

The standard limit is $1 million combined single limit (CSL), which covers both bodily injury and property damage in a single incident. Many general contractors require this on the COI before allowing you on site.

Umbrella / Excess Liability

An umbrella policy provides coverage above and beyond your primary policies. If a claim exceeds your general liability limit, the umbrella kicks in. General contractors and larger operations typically carry umbrella coverage — often $2 million or more.

For a comprehensive overview of all COI types and requirements, check our pillar page.

Minimum Coverage Limits by Trade

While requirements vary by contract and jurisdiction, the insurance industry has established standard minimums for most trades. Here's what's typical:

Electricians

General Liability: $1M per occurrence / $2M aggregate
Workers' Compensation: Statutory
Auto Liability: $1M CSL
Professional Liability: $1M (if design work is involved)

Plumbers

General Liability: $1M per occurrence / $2M aggregate
Workers' Compensation: Statutory
Auto Liability: $1M CSL

HVAC Contractors

General Liability: $1M per occurrence / $2M aggregate
Workers' Compensation: Statutory
Auto Liability: $1M CSL
Professional Liability: $1M

Roofers

General Liability: $1M per occurrence / $2M aggregate
Workers' Compensation: Statutory
Auto Liability: $1M CSL

General Contractors

General Liability: $1M per occurrence / $2M aggregate
Workers' Compensation: Statutory
Auto Liability: $1M CSL
Umbrella: $2M

These are minimums, not ceilings. Many contracts — especially on commercial or government projects — require higher limits. Always check the specific requirements in your subcontract agreement before assuming your current coverage is enough.

For a detailed breakdown of coverage requirements across different trades, see our comparison tool.

State-Specific Requirements

Insurance requirements aren't one-size-fits-all. Each state has its own rules about which types of insurance are mandatory and when they kick in. This is especially true for workers' compensation.

Workers' Compensation Thresholds by State

The most common variation is the employee threshold — how many workers you need before workers' comp becomes mandatory:

1 employee: Florida (construction), California, New York, Illinois, and most states for construction-related work
3 employees: Some states apply this threshold to non-construction industries
4 employees: Texas, Georgia, and a few others use this threshold for certain industries
5+ employees: A handful of states use higher thresholds for specific non-construction trades

Here's what this means in practice: if you're an electrician in Florida with even one employee, you need workers' comp. If you're a landscaper in Texas with three employees, you might not — until you hire the fourth.

General Liability Requirements

General liability isn't typically mandated by state law for contractors the way workers' comp is. But it's almost always required by contract. A general contractor won't let you on a job site without it. A property manager won't sign your lease without it. So even where it's not legally required, it's practically required.

Auto Liability Requirements

Most states require minimum auto liability coverage for commercial vehicles, but those minimums are often lower than what general contractors demand. State minimums might be $25,000/$50,000 — but your contract will likely require $1 million CSL. Always go with the higher requirement.

How to Get a Certificate of Insurance

Getting a COI is straightforward, but doing it right the first time saves you headaches. Here's the step-by-step process:

Step 1: Contact Your Insurance Agent or Broker

Your insurance agent or broker is the one who issues your COI. Don't try to create one yourself — it needs to come from your insurer. Call or email your agent and tell them you need a certificate of insurance for a specific job or client.

Step 2: Specify What You Need

Tell your agent exactly what the contract requires. You need to know:

What types of insurance are required (GL, workers' comp, auto, umbrella, professional liability)
What limits are required ($1M/$2M is standard for GL)
Who needs to be listed as additional insured (usually the GC or PM)
Whether you need a waiver of subrogation
Whether the policy needs to be primary and non-contributory

Step 3: Review the COI Before Submitting

Before you send the COI to anyone, check it yourself. Verify:

Your legal business name is correct on the certificate
All required policy types are listed
Coverage limits meet or exceed what's required
The effective and expiration dates cover your project timeline
Additional insured is listed correctly

Step 4: Submit to the General Contractor or Property Manager

Send the COI to whoever requested it. Most general contractors and property managers accept COIs via email, though some use online portals or COI tracking platforms.

Step 5: Track Your Expiration Date

Your COI expires when your policy expires. Mark the date on your calendar and set a reminder 30 days before expiration. You'll need to request a new COI when your policy renews — don't wait until the last minute.

Common COI Mistakes Contractors Make

Mistakes on COIs cost contractors jobs, money, and credibility. Here are the most common ones — and how to avoid them.

1. Submitting an Expired COI

This is the number one mistake. An expired COI is worthless. If you submit a COI with an expiration date that has already passed, you'll be rejected immediately. Always check the date before you send it.

2. Missing Additional Insured

If the general contractor or property manager requires additional insured status and you don't list them, your COI will be rejected. Additional insured status means they're covered under your policy if an incident occurs. Without it, they have no protection — and they won't let you work.

3. Wrong Named Insured

The name on the COI must match your legal business name exactly. If your business is registered as "Smith Electric LLC" but the COI says "Smith Electric," that's a mismatch. Some GCs will reject it on the spot. Others might accept a DBA, but many won't. Make sure your agent uses your exact legal name.

4. Insufficient Coverage Limits

Having insurance isn't enough — you need the right amount. If your contract requires $1M/$2M GL and your COI shows $500K/$1M, you're underinsured. The GC won't accept it. Review your contract requirements before asking your agent for a COI.

5. Forgetting to Update After Policy Changes

If your policy is modified — mid-term cancellation, limit changes, new endorsements — you need an updated COI. The old one doesn't reflect your current coverage. Always request a new COI after any policy change.

6. Not Having Workers' Comp When Required

If you have employees and your state requires workers' compensation, you need it. Operating without it isn't just risky — it's illegal in most states. And if a GC asks for a COI showing workers' comp and you don't have it, you're not getting on that job site.

For a complete COI requirements checklist, download our free template — it covers every field you need to verify.

What General Contractors Need to Verify

If you're a general contractor hiring subcontractors, the responsibility for COI verification falls on you. Here's what you need to check on every subcontractor's COI:

Named insured. Does the COI name match the subcontractor's legal entity? Don't accept variations or abbreviations.
Coverage types. Does the sub carry all the insurance types your contract requires? At minimum, GL and workers' comp.
Coverage limits. Do the limits meet or exceed your contract requirements? $1M/$2M GL is the floor, not the ceiling.
Expiration dates. Is the policy active for the duration of the project? A COI that expires mid-project is a liability.
Additional insured. Are you listed as additional insured on the sub's policy? This is non-negotiable.
Waiver of subrogation. Does the sub's policy include a waiver of subrogation in your favor? This prevents their insurer from suing you after paying a claim.
Primary and non-contributory. Is the sub's policy primary over yours? This means their insurance pays first.

Checking seven fields across 10 subcontractors means 70 individual checks. Do this manually and you'll miss something. That's why COI tracking for contractors matters — it automates verification and alerts you to problems before they become liabilities.

COI Tracking for Contractors

Collecting COIs is the easy part. Tracking them over time is where most contractors and general contractors struggle.

Here's the problem: you might have 15, 20, 50 subcontractors on a project. Each one has a COI with a different expiration date. Some expire in 6 months, some in 12. If you're tracking them in a spreadsheet, you're relying on manual updates and memory to keep everything current.

And then there's the mid-term problem. A subcontractor's policy gets cancelled. Their COI shows active coverage, but the underlying policy is gone. You won't find out until you try to file a claim — or worse, until an incident happens and the insurer denies coverage.

This is why manual COI tracking fails:

Spreadsheets don't update themselves. When a sub renews their policy, you need a new COI. Spreadsheets don't send reminders.
Expiration dates get missed. Without automated alerts, you find out a COI expired when it's too late.
Verification is inconsistent. One person checks additional insured, another doesn't. Mistakes slip through.
No audit trail. When something goes wrong, you can't prove you did your due diligence.

COI tracking software for contractors solves these problems. It automates collection, sends expiration alerts, verifies coverage against your requirements, and maintains a complete audit trail. For contractors managing multiple subcontractors, it's not a nice-to-have — it's essential.

Frequently Asked Questions

At minimum, contractors need general liability and workers' compensation insurance. Most general contractors also require auto liability coverage and an umbrella policy. The specific types and limits depend on the trade, the project, and state requirements.

The standard COI limit for most contractors is $1 million per occurrence and $2 million aggregate for general liability. Workers' compensation is typically statutory, meaning it meets whatever the state requires. Auto liability is usually $1 million combined single limit (CSL). Some trades like HVAC and elevator maintenance may require professional liability at $1 million as well.

General contractors, property managers, construction managers, and project owners all require subcontractors and vendors to provide a COI before work begins. This protects everyone in the chain from liability exposure if an incident occurs on the job site.

Technically, a contractor can work without a COI in some jurisdictions — but they shouldn't. Most contracts and job sites require proof of insurance before anyone steps on site. Working without a COI means the contractor has no documented coverage, exposing themselves and everyone above them in the chain to significant liability risk.

Check the named insured matches the contractor's legal business name, verify the expiration date is current, confirm coverage limits meet your contract requirements, and call the insurance agent listed on the certificate to verify the policy is active. Using COI tracking software can automate this verification process.

If a subcontractor's COI expires mid-project, they are working without active insurance coverage. This exposes the general contractor, property owner, and all parties in the chain to liability. Most contracts allow you to stop work immediately until a valid COI is provided. Automated expiration alerts at 30, 14, and 7 days before expiration help prevent this scenario.

Workers' compensation requirements vary by state. Some states require coverage for as few as one employee (like Florida for construction), while others require four or more employees before coverage is mandatory. Non-construction industries often have different thresholds. Always check your state's specific requirements.

Next Steps

Getting your COI right means getting on job sites faster, avoiding costly mistakes, and protecting your business from liability. The contractors who win work are the ones who make COI compliance easy for the people hiring them.

If you're tired of scrambling for COIs at the last minute, try COI File free for up to 5 vendors. Track expiration dates, verify coverage, and never lose a job because of a COI mistake again.

Sources & References

ACORD — The official standards body for the ACORD 25 certificate of insurance form. acord.org
International Risk Management Institute (IRMI) — Leading authority on certificates of insurance, additional insured requirements, and compliance verification. irmi.com
National Association of Insurance Commissioners (NAIC) — State-level insurance regulation data, including workers' compensation thresholds. naic.org
U.S. Bureau of Labor Statistics — Industry data on insurance requirements by trade and state. bls.gov

Certificate of Insurance: Complete Guide - the full pillar page covering COI types, ACORD forms, and requirements by industry
ACORD 25 Form Guide - how to read every section of the standard certificate of insurance
COI Tracking Guide - how to track, verify, and manage vendor certificates of insurance
COI Tracking for Contractors - how general contractors manage subcontractor insurance compliance
Free COI Requirements Checklist - 12-point verification checklist for every certificate
Coverage Comparison Tool - compare insurance requirements across different trades and projects