Are Trailers Covered Under Commercial Auto Insurance?

Coverage Basics

Commercial auto insurance typically covers vehicles used for business purposes, but whether a trailer is insured depends on the policy type and how the trailer is used. A standard commercial auto policy will cover a tow or trailer only when it is towed by a covered vehicle, not when it is driven independently.

Types of Trailer Coverage

1. Towed Coverage – Protects the trailer while it is attached to a covered vehicle. Damage to the trailer or its contents is covered if the towing vehicle is insured.

2. Freight Carrier Coverage – For trailers that are part of a freight or delivery operation. This coverage is often added to a commercial policy and protects the trailer and its cargo regardless of towing vehicle.

3. Independent Trailer Coverage – If the trailer is driven on its own (e.g., a recreational or utility trailer used for business), a separate commercial property or liability policy may be required.

Policy Exclusions to Watch For

Most commercial policies exclude coverage for trailers that are not used for business transportation, trailers that are used primarily for personal use, or trailers that are not properly registered. Additionally, some policies exclude damage from towing equipment failures or improper loading.

How to Verify Coverage

Ask your insurer for a rider or endorsement that specifically lists trailer coverage. Review the policy's "Covered Vehicles" section; if the trailer's VIN is listed or if the policy states "any vehicle used in business" includes trailers, coverage is likely.

Steps to Secure Adequate Protection

• Identify the trailer's purpose: business transportation, cargo, or recreational.
• Determine if the trailer is towed by a covered vehicle or driven independently.
• Request a policy endorsement that names the trailer or covers all trailers used in business.
• Consider additional cargo insurance for high-value goods.