General liability auto insurance describes two separate but connected policies that every general contractor must understand: commercial general liability (CGL) and commercial auto liability. In 2025, the National Association of Surety Bond Producers reported that 28% of construction disputes involved gaps in one or both of these coverage types. GCs who treat them as independent silos invite preventable risk.

This pillar guide covers CGL policy structure, commercial auto coverage, how both appear on an ACORD 25 certificate of insurance, and the minimum limits you should require from every subcontractor.

Why General Liability Auto Insurance Matters for GCs

A single construction project generates two distinct categories of third-party risk.

On-site risk. A subcontractor's employee drops a tool from scaffolding and injures a pedestrian. A plumbing crew damages an existing structure during a renovation. These scenarios fall under the CGL policy.

Transit risk. A sub's driver rear-ends a minivan while hauling materials to your job site. A rented crane truck damages a traffic light on the way to a pour. These scenarios fall under commercial auto liability.

Both exposures trace back to you. In 37 states, a GC can face vicarious liability for accidents caused by subcontractors performing work under the GC's control. If either policy is missing or underinsured, you absorb the financial hit.

CGL Policy Structure: Coverage A, B, and C

Every commercial general liability policy contains three coverage parts. Understanding each one helps you spot gaps when reviewing a sub's certificate of insurance.

Coverage A: Bodily Injury and Property Damage

Coverage A is the backbone of every CGL policy. It pays for third-party bodily injury and property damage caused by the insured's operations.

In construction, Coverage A responds to scenarios like a sub's scaffold collapse injuring a bystander, or a sub's excavation work cracking a neighbor's foundation. The standard ISO CGL form (CG 00 01) triggers Coverage A on an occurrence basis, meaning the event causing injury must happen during the policy period.

Coverage A also includes products-completed operations, which covers damage that occurs after the sub finishes work. A roof installed in January that leaks in June still triggers Coverage A if the policy was active when the work happened.

Coverage B: Personal and Advertising Injury

Coverage B handles claims of libel, slander, false arrest, wrongful eviction, and copyright infringement in advertising. Construction projects rarely trigger Coverage B claims, but they do happen.

A real-world example: a GC posted online reviews criticizing a former subcontractor's work quality, and the sub filed a defamation claim. Coverage B responded.

Coverage C: Medical Payments

Coverage C pays small medical bills (typically up to $5,000 per person) for third parties injured on or near the job site, regardless of fault. It acts as a goodwill mechanism that can prevent larger lawsuits.

If a visitor trips on a power cord at your job site and needs an ER visit, Coverage C pays the medical bill without requiring a liability determination.

Coverage Part	What It Covers	Typical Limit	Construction Relevance
Coverage A	Bodily injury, property damage, products-completed ops	$1M per occurrence / $2M aggregate	High. Primary coverage for job-site incidents
Coverage B	Personal injury, advertising injury	Included in general aggregate	Low. Rare in construction contexts
Coverage C	Medical payments regardless of fault	$5,000-$10,000 per person	Moderate. Prevents small claims from escalating

Commercial Auto Liability: Hired and Non-Owned vs. Fleet

The auto liability section of general liability auto insurance covers vehicles used in connection with your project.

Types of Commercial Auto Coverage

Owned autos. Vehicles titled to the contractor. A sub's dump truck, crane, or service van falls here.

Hired autos. Vehicles the contractor rents or leases. A sub who rents a flatbed for a single delivery needs hired auto coverage to protect you if that truck causes an accident.

Non-owned autos. Personal vehicles employees use for business purposes. When a sub's foreman drives his personal truck to pick up materials, non-owned auto coverage fills the gap.

Fleet policies. Contractors with five or more vehicles typically carry fleet policies. Fleet policies use a single premium calculation across all vehicles and often include maintenance tracking and driver qualification requirements.

Symbol Numbers on Auto Policies

Commercial auto policies use numerical symbols to define which vehicles are covered.

Symbol	Description	What It Covers
1	Any auto	All owned, hired, and non-owned
2	Owned autos only	Vehicles titled to the insured
7	Specifically described autos	Only vehicles listed on the policy
8	Hired autos only	Rented or leased vehicles
9	Non-owned autos only	Employee personal vehicles used for business

GCs should look for Symbol 1 ("Any Auto") on a sub's certificate. It provides the broadest protection.

How Both Policies Appear on the ACORD 25

The ACORD 25 certificate of insurance displays both CGL and auto coverage in separate sections.

CGL section. Look for "Commercial General Liability" checked, occurrence-based trigger, and per-occurrence and aggregate limits. Confirm that products-completed operations is not excluded.

Auto section. Look for "Commercial Auto Liability" or "Business Auto" checked. Check which coverage symbols apply. Verify that hired and non-owned coverage is included, especially for subs who do not own fleet vehicles.

Additional insured status. Both sections should name you as additional insured. Your name must appear in the Description of Operations box or on an attached endorsement. On the CGL side, look for CG 20 10 (ongoing operations) and CG 20 37 (completed operations). On the auto side, look for CA 20 48 or equivalent.

Waiver of subrogation. Both policies should contain a waiver of subrogation endorsement in your favor. Without it, a sub's insurer can sue you after paying a claim, even if you are named as additional insured.

Minimum Limits GCs Should Require From Subs

Insurance requirements vary by project size and risk profile. These minimums represent industry standards for commercial construction projects valued at $1M to $25M.

Coverage Type	Per Occurrence	Aggregate	Notes
CGL - Bodily Injury/Property Damage	$1,000,000	$2,000,000	Products-completed ops included
CGL - Personal/Advertising Injury	$1,000,000	Included in aggregate	Standard on ISO form
CGL - Medical Payments	$5,000 per person	N/A	Minimum, $10,000 preferred
Commercial Auto	$1,000,000 CSL	N/A	Combined single limit
Umbrella/Excess	$2,000,000	$2,000,000	Follows form over CGL and auto

For projects over $25M, many GCs require $5M umbrella limits. Public works projects and infrastructure jobs often require $5M to $10M in umbrella coverage.

Common Gaps in General Liability Auto Insurance Coverage

GCs encounter these problems repeatedly when reviewing subcontractor coverage.

Missing hired and non-owned auto. Small subs often carry CGL but skip auto coverage entirely, assuming personal auto policies cover business use. Personal auto policies exclude business activities in most states.

Sunset clauses on completed operations. Some commercial general liability policies limit products-completed operations coverage to one or two years after project completion. The standard statute of repose in most states runs six to ten years.

Aggregate erosion. A sub with a $2M aggregate who has already paid $1.5M in claims that year has only $500,000 remaining. Ask for loss runs to check remaining aggregate capacity.

Non-contributory language missing. Without primary and non-contributory language, a sub's insurer can force your policy to share in a claim payment. Look for endorsement CG 20 01 or equivalent language.

Subcontractor exclusions on the auto policy. Some commercial auto policies exclude coverage for vehicles operated by subcontractors. If your sub hires a sub-tier contractor who drives on the project, this exclusion creates a gap.

How to Verify General Liability Auto Insurance Compliance

Reviewing certificates manually takes an average of 12 minutes per sub per project. On a project with 40 subcontractors, that adds up to 8 hours just for initial review, before renewal tracking, endorsement verification, and deficiency follow-up.

Step 1. Collect ACORD 25 certificates from every sub before work begins.

Step 2. Verify CGL is occurrence-based with minimum $1M/$2M limits.

Step 3. Confirm Coverage A includes products-completed operations without sunset restrictions.

Step 4. Check commercial auto for Symbol 1 or combined Symbols 2, 8, and 9 with $1M combined single limit.

Step 5. Verify additional insured status on both CGL and auto policies.

Step 6. Confirm waiver of subrogation endorsements on both policies.

Step 7. Set expiration alerts for every policy and track renewals 30 days in advance.

We built SubcontractorAudit to automate every step above. The platform extracts data from uploaded certificates, compares limits against your contract requirements, flags missing endorsements, and sends renewal reminders automatically.

Connecting CGL and Auto to Your Broader Insurance Program

CGL and auto policies do not operate alone. They fit into a layered insurance program.

Umbrella/excess liability sits on top of both CGL and auto, providing additional limits when underlying policies are exhausted. Require umbrella policies that follow form over both.

Workers' compensation covers employee injuries. CGL excludes injuries to the insured's own employees.

Inland marine/builders risk covers materials and equipment in transit and on site. Auto policies cover the vehicle; inland marine covers the cargo.

Professional liability covers design errors. If a sub provides any design services (even shop drawings), they need professional liability coverage.

Frequently Asked Questions

Does a CGL policy cover auto accidents? No. CGL policies contain a standard auto exclusion (ISO Exclusion g) that removes coverage for bodily injury or property damage arising from the ownership, maintenance, or use of any auto. Auto accidents require a separate commercial auto policy.

Can a subcontractor use personal auto insurance for business driving? Personal auto policies exclude business use in most states. If a sub's employee causes an accident while running a work errand, the personal policy will likely deny the claim. Require commercial auto or hired/non-owned coverage from every sub.

What is the difference between occurrence and claims-made CGL policies? An occurrence policy covers events that happen during the policy period, regardless of when the claim is filed. A claims-made policy covers claims filed during the policy period, regardless of when the event happened. Occurrence policies provide better long-term protection for construction work. Require occurrence-based CGL from all subs.

How do I verify that a sub's CGL includes products-completed operations? On the ACORD 25, look for a check mark next to "Products-Completed Operations Aggregate Limit." If the aggregate limit shows $0 or the box is unchecked, the sub either lacks this coverage or has excluded it. Request the actual policy endorsement page to confirm.

What happens if a sub's insurance lapses mid-project? You face direct exposure. If the sub causes damage while uninsured, your own CGL policy becomes the first line of defense, likely as additional insured on the lapsed policy. Stop the sub from working immediately and require proof of renewed coverage before allowing them back on site.

Should I require the same limits from every sub regardless of trade? Base limits should be consistent ($1M/$2M CGL, $1M auto), but high-risk trades warrant higher requirements. Demolition, structural steel, and roofing contractors should carry $2M/$4M CGL and $5M umbrella minimums due to the severity of potential claims in those trades.