Published by ALKEME Insurance Services · Licensed Insurance BrokerageLast updated April 2026

Coverage

Primary Auto Liability Insurance

Federally mandated protection that covers bodily injury and property damage caused by your commercial vehicles.

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Primary auto liability is the foundational coverage every Transportation operation must carry. It responds when your driver is at fault in an accident, paying for injuries to other parties and damage to their property up to your policy limit. Federal regulations under FMCSA require minimum limits ranging from $750,000 to $5,000,000 depending on the commodities you haul, making this the single most important policy in any fleet insurance program.

What It Covers

Primary auto liability pays for bodily injury and property damage that your covered vehicles cause to third parties. This includes medical expenses, lost wages, pain and suffering, legal defense costs, and repair or replacement of damaged property. The policy responds regardless of which driver is behind the wheel, provided they are operating under your authority.

Coverage extends to accidents on public roads, at shipper and receiver facilities, and in any location where your vehicle is legally permitted to operate. Defense costs are typically covered in addition to your liability limit, meaning your full policy amount remains available for settlements and judgments.

It is important to understand that primary auto liability does not cover damage to your own vehicle or cargo. Those exposures require separate physical damage and motor truck cargo policies. Auto liability strictly addresses your financial obligation to others when your operations cause harm.

Who Needs It

Every motor carrier operating under its own USDOT number and MC authority is required by federal law to maintain primary auto liability coverage. This applies to for-hire carriers, private carriers hauling their own goods, and owner-operators leased onto a carrier who need coverage under their own authority during periods of non-dispatch.

The FMCSA sets minimum financial responsibility requirements based on what you transport. General freight carriers must carry at least $750,000 in coverage, while haulers of hazardous materials face minimums of $1,000,000 or $5,000,000. Many shippers and brokers contractually require limits well above the federal floor, with $1,000,000 being standard for general commodities.

Why It Matters

A single serious Transportation accident can generate claims that dwarf the federal minimum limits. Jury verdicts exceeding $10,000,000 in Transportation cases have become increasingly common, a trend the industry calls nuclear verdicts. Without adequate auto liability limits, a catastrophic claim can bankrupt a motor carrier overnight.

Beyond financial protection, maintaining proper auto liability coverage is a condition of your operating authority. A lapse in coverage triggers an automatic revocation process with the FMCSA, shutting down your ability to legally operate. Brokers and shippers verify your coverage status in real time through FMCSA databases, so even a brief gap can cost you freight contracts.

Key Coverage Features

  • ●Bodily injury liability for third-party medical costs, rehabilitation, and lost income
  • ●Property damage liability for vehicles, structures, and infrastructure you damage
  • ●Legal defense costs typically paid in addition to your coverage limit
  • ●MCS-90 endorsement filed with the FMCSA to satisfy financial responsibility requirements
  • ●Hired auto coverage available for vehicles you rent or borrow for business use
  • ●Coverage for all scheduled power units and drivers listed on your policy
  • ●Automatic coverage for newly acquired vehicles within a specified reporting window

Frequently Asked Questions

The FMCSA requires a minimum of $750,000 for general freight carriers. Carriers transporting hazardous materials must carry $1,000,000 or $5,000,000 depending on the specific commodity. Many shippers and brokers require $1,000,000 as a contractual minimum regardless of what you haul.

No. Primary auto liability only covers damage and injuries you cause to other parties. To protect your own vehicles, you need a separate physical damage policy that includes collision and comprehensive coverage.

The FMCSA is notified of any coverage lapse and will begin revocation proceedings against your operating authority. Your carrier status changes to "not authorized" in the FMCSA database, which brokers and shippers check before tendering loads. Even a single day without coverage can result in lost contracts and regulatory penalties.

The MCS-90 is a federal endorsement attached to your auto liability policy that guarantees minimum financial responsibility to the public. It ensures that your insurer will pay valid claims even if a technical policy exclusion might otherwise apply. The MCS-90 is required for all for-hire interstate motor carriers.

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