Auto liability insurance is a commercial insurance policy that covers bodily injury and property damage to third parties arising from the operation of covered vehicles in connection with business activities. It is a standard requirement in service contracts, vendor agreements, construction contracts, and virtually any commercial relationship where one party's employees or agents operate vehicles - owned, hired, or borrowed - in the course of performing work.
Auto liability insurance is a commercial policy covering bodily injury and property damage to third parties arising from the operation of vehicles used in business activities - whether owned, hired, or borrowed.
Auto liability is distinct from commercial property damage to the vehicle itself (covered by physical damage/collision) and from cargo damage (covered by motor truck cargo). It covers the harm caused to others when a business's vehicles are involved in accidents.
What Auto Liability Covers
A commercial auto liability policy covers:
- Bodily injury to third parties caused by vehicle accidents - medical expenses, lost wages, pain and suffering
- Property damage to third-party property caused by vehicle accidents
- Legal defense costs arising from covered liability claims
Coverage applies to vehicles listed in the policy declarations (scheduled vehicles) and, depending on the form, to employees using their personal vehicles for business purposes under hired and non-owned auto (HNOA) coverage.
Hired and Non-Owned Auto (HNOA)
Hired auto coverage extends auto liability to vehicles the business rents, leases, hires, or borrows in the course of business operations. Non-owned auto coverage extends auto liability to vehicles owned by employees, partners, or contractors when used for company business - a delivery driver using their personal truck, a field technician driving their own car to client sites, a sales representative using their personal vehicle for business travel.
HNOA coverage is critical and frequently missing from COIs. A business whose employees regularly use personal vehicles for work has auto liability exposure that the employer's CGL policy does not cover and that the employee's personal auto policy typically excludes for commercial use. Without HNOA coverage, an accident involving an employee's personal vehicle during a business errand creates an uninsured gap.
Many contracts now specifically require HNOA coverage by name. If a contractor submits a COI that shows commercial auto coverage but not HNOA, and their employees drive personal vehicles to client sites, the coverage requirement is incomplete.
When Contracts Require Auto Liability
Contracts requiring auto liability include any agreement where:
- The contractor or vendor operates owned vehicles in performing the work (delivery trucks, service vehicles, contractor pickups, dump trucks)
- Employees drive to client locations and use company vehicles
- The work involves transportation, logistics, or field service
- Vehicles are used to transport equipment, materials, or personnel to job sites
Even businesses without a fleet of owned vehicles often have auto liability exposure through employee use of personal vehicles for work - which is the HNOA exposure. Contracts with thoughtful insurance requirements specify HNOA coverage separately from owned-vehicle auto liability.
Combined Single Limit vs. Split Limits
Commercial auto liability is written with either a combined single limit (CSL) or split limits:
- Combined single limit (CSL): A single dollar amount per occurrence that applies to bodily injury and property damage combined. Common CSL minimums in commercial contracts are $1 million per occurrence.
- Split limits: Separate limits for bodily injury per person, bodily injury per accident, and property damage. Example: $500,000 / $1,000,000 / $100,000 - meaning $500K per injured person, $1M per accident for all bodily injury, and $100K for property damage.
Most commercial contracts require CSL rather than split limits because CSL provides more predictable and flexible coverage. If a contract requires a $1 million CSL and the submitted COI shows split limits of $500K/$1M/$100K, the limits may or may not meet the contract requirement depending on how the contract language is interpreted - and that ambiguity is a compliance issue.
How to Verify Auto Liability on an ACORD 25
Commercial auto liability appears in the auto liability section of the ACORD 25. When reviewing for compliance:
- Confirm the "Any Auto" or applicable auto designation box is checked - this provides the broadest coverage and is preferred over "Scheduled Autos Only" or "Hired Autos Only" in most contracts
- Verify the combined single limit equals or exceeds the contract minimum
- Check for HNOA notation - it should appear either in the auto section or in the description of operations
- Confirm the policy period is active throughout the contract term
- If the contract requires additional insured status for auto liability, confirm it is noted
Common Deficiencies in Auto Liability COIs
Missing HNOA. This is the most frequent auto liability compliance gap. The COI shows commercial auto coverage for owned vehicles, but the contractor's employees drive personal vehicles to job sites, and HNOA is not listed. The contract requires it. The gap is invisible on the face of the certificate unless the reviewer specifically looks for the HNOA notation.
Scheduled autos only - no hired or non-owned. "Scheduled Autos Only" coverage applies only to vehicles listed in the policy. If a new vehicle is added to the fleet but not the policy, or if a non-owned vehicle is used, there is no coverage.
Wrong limits. Split limits submitted when CSL is required, or CSL below the contract minimum. A $500,000 CSL submitted against a $1 million contract requirement is a straightforward deficiency.
Wrong vehicle types. A contractor whose work requires heavy trucks or specialized vehicles may have auto liability that excludes those vehicle types. Verify that the vehicles used in performing the contract are within the policy scope.
No coverage for additional insureds. Contracts that require the project owner or property manager to be an additional insured on auto liability are often satisfied on the GL certificate but overlooked on the auto certificate.
Who Needs Auto Liability Insurance
Auto liability requirements appear most commonly in contracts involving:
- General and specialty contractors - vehicles used to transport workers, equipment, and materials
- Transportation and logistics companies - core business exposure
- Delivery and courier services - both owned fleet and employee personal vehicles
- Field service businesses - HVAC, plumbing, electrical, IT services, pest control
- Property management - vehicles used for maintenance, inspections, and tenant services
- Healthcare - home health aides, medical transport, mobile clinical services
How Bramble Helps
Bramble reads your contracts to identify auto liability requirements - CSL minimums, HNOA requirements, vehicle type designations, and additional insured provisions - then checks every submitted COI for exact compliance. HNOA gaps and split-limit deficiencies are among the most common auto liability compliance failures that manual review misses. With 70% of COIs non-compliant at first submission, automated cross-referencing catches these issues before a vehicle incident turns into a $500,000+ uninsured exposure.
Visit getbramble.com to see how Bramble verifies auto liability and every other coverage requirement against your contracts automatically.