Subcontractor Insurance Requirements (What GCs Must Verify) | Grit

Subcontractor insurance requirements are a make-or-break detail on every construction project. Contractors face real risk working across multiple job sites, and even a minor accident or property mishap can turn into a costly claim. Understanding the insurance obligations placed on subcontractors helps general contractors (GCs) manage that risk, stay compliant, and protect both people and property on the job.

Whether you are a subcontractor providing a specialized trade or a general contractor managing multiple crews, knowing the specific subcontractor insurance requirements up front prevents disputes, financial setbacks, and project delays.

Here is the reality in 2026: you win a bid, the GC sends the subcontract, and buried in the middle is a section titled "Insurance Requirements" that reads like it was written by a lawyer who charges by the word. If your certificate of insurance does not check every box, you do not start work. No exceptions. The GC's risk team will hold your first draw until the paperwork is right. This guide breaks down what GCs and project owners are actually demanding, the limits and endorsements you need, and how to meet those requirements without paying more than you should.

Why Insurance Requirements Are Getting Stricter

General contractors are not inventing these requirements to annoy you. They are responding to real pressure from three directions:

• Project owners and lenders are requiring GCs to push insurance obligations down to every subcontractor on the job. If you are uninsured or underinsured and cause a loss, the GC's policy pays - and their premiums go up.
• Rising claim costs are hitting the construction industry hard. Social inflation - larger jury verdicts and more aggressive plaintiff attorneys - is pushing insurers to tighten underwriting and raise premiums 5% to 15% annually (CBIZ, 2025). GCs pass that risk downstream.
• Workers comp audits catch GCs who hire uninsured subs. If your sub does not carry workers compensation, the GC's insurer charges the GC retroactive premium on that sub's payroll at audit time (Carolina Risk Partners, 2026). That is a direct hit to the GC's bottom line.

The bottom line: GCs who do not enforce subcontractor insurance requirements lose money, so they enforce them. Your job is to show up ready.

Subcontractor Insurance Requirements Every Sub Must Carry

Meeting subcontractor insurance requirements starts with the core policies every subcontractor should carry. These protect both you and the general contractor from financial loss and legal claims, which is exactly why GCs insist on them.

General liability insurance is the foundation. It covers third-party bodily injury and property damage that can happen during your work. If a worker accidentally damages a client's property or someone is injured on-site, this coverage can pay for medical bills or repair costs.

Workers compensation is mandatory for most subcontractors with employees. It protects injured workers while shielding the GC from lawsuits tied to workplace accidents. Even small crews benefit from carrying it to stay compliant and reduce exposure.

Commercial auto insurance protects the vehicles used to move equipment, tools, and people. Construction work means materials moving between sites, and a wreck in transit can lead to a substantial claim. This coverage keeps both subcontractors and GCs financially protected.

Some specialized subcontractors also need professional liability insurance. It handles claims arising from mistakes, errors, or omissions in the work. For trades that provide design, engineering, or technical services, this policy fills a gap that general liability does not address.

Standard Insurance Limits GCs Require in 2026

Every subcontract is different, but here is the baseline most GCs on commercial and public projects are requiring in 2026.

Commercial General Liability (CGL)

• $1,000,000 per occurrence
• $2,000,000 general aggregate (per project aggregate preferred)
• $2,000,000 products and completed operations aggregate
• Coverage on an occurrence basis (not claims-made)
• Must include premises/operations, products-completed operations, contractual liability, and personal and advertising injury

Larger projects and higher-risk trades like demolition, roofing, and steel erection often require $2,000,000 per occurrence or more. If the subcontract calls for limits above your base policy, an umbrella or excess policy can fill the gap affordably.

Workers Compensation

• Statutory limits as required by the state where the work is performed
• Employers liability: $1,000,000 each accident / $1,000,000 disease per employee / $1,000,000 disease policy limit

Workers comp is not optional on virtually any commercial jobsite. Even if your state allows exemptions for owners or small crews, the subcontract overrides that. No workers comp certificate, no work.

Commercial Auto Liability

• $1,000,000 combined single limit for bodily injury and property damage
• Must cover owned, hired, and non-owned vehicles

If you drive any vehicle to the jobsite, even your personal truck, you need commercial auto coverage. Hired and non-owned coverage protects you when employees drive their personal vehicles for work.

Umbrella or Excess Liability

• $1,000,000 to $5,000,000 depending on project size and GC requirements
• Must follow form over GL, auto, and employers liability

For subcontractors bidding work over $1 million, most GCs require at least a $2,000,000 umbrella. On federal, infrastructure, and large commercial projects, $5,000,000 or more is common (Vertikal RMS, 2025).

The Endorsements That Actually Matter

Limits alone are not enough. GCs require specific endorsements on your policy, and missing even one will get your COI rejected. Here are the endorsements you need to understand.

Additional Insured - CG 20 10 and CG 20 37

This is the most important endorsement in subcontractor insurance. It adds the GC, and often the project owner, as an insured on your general liability policy.

• CG 20 10 covers the additional insured for claims arising from your ongoing operations - work you are actively performing.
• CG 20 37 covers the additional insured for claims arising from your completed operations - work you have already finished.

You need both. CG 20 10 alone leaves the GC exposed after you leave the jobsite, and many completed operations claims surface months or years after the work is done.

The edition date matters. The current versions are the 12/19 editions, which provide coverage to the additional insured up to the lesser of the limits required by contract or the limits available under your policy (ATSSA). Earlier editions (07/04 and 04/13) narrowed coverage, so a GC who knows what they are doing will specify the edition they require.

What to tell your agent: "I need blanket additional insured for both ongoing and completed operations - CG 20 10 and CG 20 37 - on every job." Most carriers offer this as a blanket endorsement so you do not have to schedule each GC individually.

Primary and Noncontributory

This endorsement means your policy pays first on a claim involving the additional insured (the GC), and the GC's own policy does not contribute until your limits are used up.

Without this language, both policies could be forced to share the claim from dollar one. That defeats the purpose of the additional insured requirement and creates a coverage fight between carriers that delays everything (Billy for Insurance).

Look for this language on your endorsement: "This insurance is primary and will apply without contribution from any other insurance available to the Additional Insured."

Waiver of Subrogation

A waiver of subrogation prevents your insurance carrier from suing the GC or project owner to recover money it paid on a claim, even if the GC was partly at fault.

Here is why it matters: without the waiver, your insurer pays a claim and then turns around and sues the GC to get its money back. That creates lawsuits between project participants, delays the job, and wrecks the working relationship (AIA Contract Documents).

Most subcontracts require a blanket waiver of subrogation on GL, workers comp, and auto policies. Your carrier may charge a small additional premium for it, but it is standard and every major carrier offers it.

How to Read the Insurance Section of a Subcontract

Before you sign any subcontract, read the insurance section start to finish. Here is what to look for:

1. Required coverage types. GL, workers comp, auto, umbrella - confirm you carry each one.
2. Minimum limits. Compare the contract limits to your current policy. If the contract requires higher limits, talk to your agent before you sign, not after.
3. Endorsements required. Look for additional insured, primary and noncontributory, waiver of subrogation, and per-project aggregate. List every endorsement the contract names.
4. Certificate delivery timeline. Most contracts require your COI before work starts. Some require it within a set number of days after signing. Miss the deadline and you cannot mobilize.
5. Completed operations period. Some contracts require you to maintain completed operations coverage for 3 to 8 years after project completion (Creative Builders). That means you cannot cancel your GL policy after the job is done without violating the subcontract.
6. Indemnification clause. This works hand in hand with the insurance requirements and defines who is responsible for what. Many states have anti-indemnity statutes that limit how much risk can be pushed to subcontractors, so know your state's rules.
7. Right to procure insurance. Most subcontracts say the GC can buy insurance on your behalf and charge you for it if you fail to comply. That insurance will cost you far more than getting it yourself.

The Subcontractor Insurance Checklist: Use This Before Every Bid

The certificate of insurance is how the GC verifies you are covered, so it has to be right before you mobilize. Run through this checklist before you sign any subcontract.

Common Mistakes That Cost Subcontractors Time and Money

After 30 years of building contractor insurance programs, we see the same mistakes on repeat:

1. Waiting until the last minute to request endorsements. Your agent needs time to process additional insured endorsements and issue updated certificates. Give them 3 to 5 business days, not the night before you start work.
2. Confusing the COI with actual coverage. The ACORD certificate is a snapshot, not the policy. A COI that says "additional insured" in the description box does not mean the endorsement actually exists on your policy. The GC's risk team knows the difference (BCS Insurance).
3. Carrying minimum limits to save money. A $500,000 GL policy might save you $200 a year over a $1,000,000 policy, but it disqualifies you from 90% of commercial subcontracts. The math does not work.
4. Not reading the insurance section before bidding. Win a job and then discover the GC requires a $5,000,000 umbrella you do not carry, and your only options are buying it at a rush (expensive) or walking away (worse). Read the requirements before you bid.
5. Letting policies lapse between jobs. GCs check your COI dates. A gap in coverage makes you look unreliable, and some GCs will not work with you again. Maintain continuous coverage even during slow periods.
6. Ignoring completed operations requirements. Your GL policy covers claims from work you have already finished. Cancel too early and you are exposed to claims with no coverage and in violation of the subcontract.

How to Meet Requirements Without Overpaying

You do not need to pay top dollar to check every box. Here is how smart subcontractors keep costs down:

• Use blanket endorsements. A blanket additional insured endorsement covers every GC you work for under one endorsement. It costs less than scheduling each GC individually and kills the paperwork headache.
• Bundle your policies. GL, auto, workers comp, and umbrella from the same carrier or through the same agent often qualifies for package pricing.
• Right-size your umbrella. If most of your contracts require a $2,000,000 umbrella, do not carry $1,000,000 and pay to increase it every time. Carry the $2,000,000 from the start - the annual cost difference is often less than $500.
• Work with an agent who knows construction. A generalist who also writes home and auto will not know the difference between CG 20 10 and CG 20 33. That knowledge gap costs you rejected certificates and delayed start dates.
• Keep your loss history clean. Your experience modification rate (EMR) on workers comp and your claims history on GL drive your premiums. Every dollar you put into jobsite safety pays back in lower insurance costs.

How Subcontractors and GCs Avoid Coverage Gaps

Staying compliant is on both parties. Verify certificates before any work begins, maintain policies through the entire project so a lapse never opens a hole mid-job, and confirm the coverage on paper actually matches the contract - the right GL limits, the GC named as additional insured, and protection for transportation and job site risks. Do those three things and the work keeps moving without a costly dispute.

A Note for GCs: Share This With Your Subs

If you are a general contractor reading this, bookmark it. The next time a sub asks "what insurance do I need?" send them this page instead of a 14-page exhibit. It covers the same ground in plain English.

Better yet, standardize your insurance requirements across all subcontracts and hand out a one-page summary with your bid invitations. The subs who show up with the right coverage on day one are the subs who will not slow down your project.

If your subs need help meeting your requirements, have them call us. We build contractor insurance programs built to meet GC and project owner requirements at competitive rates, because that is all we do.

Frequently Asked Questions

What happens if I start work without meeting the GC's insurance requirements?

The GC can stop your work immediately, withhold payment, or purchase insurance on your behalf and back-charge you for the cost. In most subcontracts, failure to maintain required insurance is a default that gives the GC the right to terminate the agreement. It is not worth the risk.

Can I negotiate insurance requirements in a subcontract?

Sometimes. If a GC requires $5,000,000 in umbrella coverage for a $50,000 drywall job, that is disproportionate, and most reasonable GCs will adjust. But the core requirements - GL limits, additional insured, workers comp - are rarely negotiable on commercial projects. Talk to your agent first to understand what changes would actually affect your cost before you push back.

What is the difference between being an "additional insured" and a "certificate holder"?

A certificate holder just receives a copy of your certificate of insurance, which gives them no coverage rights. An additional insured has actual coverage under your policy for claims arising from your work. GCs need additional insured status, not just a certificate. The COI alone does not transfer risk.

Do I need a surety bond in addition to insurance?

Insurance and surety bonds serve different purposes. Insurance covers accidents and liability. A surety bond guarantees you will complete the work and pay your suppliers and workers. On public projects over $150,000 (federal) or varying thresholds by state, performance and payment bonds are required by law. Many private GCs also require bonds on larger subcontracts. If you are bidding bonded work, talk to a surety specialist about building your bond program.

How often should I review my insurance program?

At minimum, review your program every year at renewal. If you are growing - taking on larger projects, hiring more employees, expanding to new states - review mid-year with your agent. The worst time to find out your limits are too low is when a GC rejects your certificate on a job you already won.

Get Your Insurance Program Right Before Bid Day

At Grit Insurance Group, we build insurance programs for subcontractors and general contractors across the country. We know what GCs require because we work with GCs every day. We will review your current coverage, find the gaps, and set up your program so you never lose a job over a certificate of insurance.

Call the Grit team today: (801) 505-5500 | gritinsurance.com

Author: Grit Insurance Group | National Contractor Insurance and Surety Bonding