12.5 Commercial Auto Endorsements

Liability-gap endorsements

The two most common commercial-auto endorsements close predictable gaps:

• Hired Auto Liability (Symbol 8): covers liability arising from autos the business leases, hires, rents, or borrows — for example, a sales manager renting a car on a business trip.
• Non-Owned Auto Liability (Symbol 9): covers the business's liability when employees use their own cars on company errands. Without it, a delivery made in an employee's personal car could expose the employer with no coverage.

These are frequently combined as Hired and Non-Owned Auto (HNOA) coverage. Both grant liability only — there is no physical damage on autos the insured does not own.

HNOA premium for non-owned exposure is usually based on the number of employees rather than on scheduled vehicles, because the insurer cannot count autos it never sees. Hired-auto premium is typically based on the cost of hire (the rental charges paid during the term). Knowing these rating bases helps explain why a business with few owned vehicles but many driving employees still needs meaningful HNOA limits.

Drive Other Car (DOC) endorsement

A business owner or executive who drives only company-furnished vehicles may have no personal auto policy. That person is well covered while driving the company car, but has a gap when borrowing a friend's car or renting on vacation, because the commercial policy reaches autos used in the business, not personal use.

The Drive Other Car (DOC) endorsement extends the commercial policy to give the named individual (and often a spouse) personal-auto-style coverage — liability, medical payments, UM/UIM, and sometimes physical damage — while using a non-owned auto for personal purposes. Trap: DOC is for individuals who do not own a private passenger auto; it is not meant to duplicate an existing personal auto policy.

DOC works in tandem with a companion endorsement, Individual Named Insured, which converts the company auto policy so it behaves like a personal auto policy for the named person's family use of the covered auto. Together they treat the executive much like a PAP would: family members become insureds, personal use is contemplated, and the gap between "business use only" commercial wording and ordinary personal driving disappears. The exam expects you to recognize that DOC is the answer when the fact pattern says the insured drives only company cars and has no personal auto policy of their own.

First-party injury endorsements

• Uninsured/Underinsured Motorists (UM/UIM): pays the insured's BI (and in some states PD) when the at-fault driver has no insurance or too little. Required or offered in most states.
• Auto Medical Payments: pays reasonable medical expenses for the insured and occupants regardless of fault, on a small-limit basis.
• Personal Injury Protection (PIP) / No-Fault: in no-fault states, pays medical, wage loss, and similar benefits regardless of fault; selected via Symbol 5.

UM coverage typically requires the at-fault auto to be a "hit" vehicle or an identified uninsured motorist; underinsured (UIM) coverage layers on top when the other driver carries some, but not enough, liability insurance. In many states UM/UIM must be offered in writing, and a rejection must be signed, a consumer-protection rule that frequently appears in state-law questions paired with this national material.

Other tailoring endorsements include Mobile Equipment (clarifying when equipment is treated as an auto vs. mobile equipment), Rental Reimbursement (a daily allowance for a substitute vehicle while a covered auto is repaired), and Towing and Labor.

The mobile equipment distinction matters because vehicles such as forklifts, cranes, and bulldozers are generally treated as mobile equipment under the general liability policy, not autos — until they are licensed for road use or carry mounted equipment, when the auto form may pick up the road exposure. Misclassifying a piece of equipment can leave a liability gap, so the endorsement and the underlying definitions decide which policy responds when, for example, a forklift injures someone on a public street.

Experience rating and the mod

Larger commercial accounts are experience rated: the insured's own loss history adjusts the premium through an experience modification factor (the "mod").

• A mod of 1.00 is neutral (average for the class).
• A mod above 1.00 means worse-than-average losses → premium surcharge.
• A mod below 1.00 means better-than-average losses → premium credit.

Worked example. Manual (base) premium is $40,000 and the insured's experience mod is 0.85. Modified premium = $40,000 × 0.85 = $34,000, a $6,000 credit for good loss experience.

If instead the mod were 1.20, modified premium = $40,000 × 1.20 = $48,000, an $8,000 surcharge. Experience rating rewards loss control and is a core incentive concept the exam expects you to compute.

The mod is built from the insured's actual losses versus expected losses for its class, so frequency of small claims often hurts the mod more than a single large one, because rating plans cap the impact of any one severe loss. That is why fleet safety programs, telematics, and driver training pay off twice — first by reducing the raw losses, and again by lowering the mod that multiplies next year's premium. Candidates should be ready to read a mod off a fact pattern (above 1.00 = surcharge, below 1.00 = credit) and multiply it against the manual premium to find the final figure, exactly as the worked examples above demonstrate.