12.5 Commercial Auto Endorsements

Why Endorsements Matter

The base BACF leaves predictable gaps, and ISO publishes a library of commercial auto endorsements (CA 99 xx, CA 04 xx, CA 23 xx) to tailor coverage. Exam questions cite endorsements by name and purpose more than by form number, so learn what each one does.

Endorsements either broaden coverage (drive other car, hired auto physical damage), restrict it (driver exclusions, age limits), or satisfy a legal/contractual requirement (additional insured, primary and noncontributory).

Common Broadening Endorsements

Trap: Drive Other Car is for individuals who have no personal auto policy because the business owns all their vehicles — it patches the resulting personal-use gap.

Restricting Endorsements and Additional Insureds

Driver exclusion endorsements remove coverage when a specifically named, high-risk driver operates a covered auto — used to keep an account insurable. Audio/visual and electronic equipment limitations cap comp recovery on aftermarket gear.

For contractual risk transfer, the Additional Insured and Primary and Noncontributory wording make the insured's policy respond first and protect a project owner or lessor. The Waiver of Transfer of Rights of Recovery (Waiver of Subrogation) stops the insurer from subrogating against a party the insured agreed by contract to hold harmless.

Experience Modification — Worked Example

Commercial auto premiums on larger fleets can be experience-rated: an experience modification factor (mod) adjusts the manual premium based on the insured's own loss history versus expected losses for its class.

• A mod above 1.00 means worse-than-average losses (surcharge).
• A mod below 1.00 means better-than-average losses (credit).

Worked example: manual premium $40,000, experience mod 0.85.

• Modified premium = $40,000 × 0.85 = $34,000 (a $6,000 credit for good experience)

If the same fleet later runs a 1.20 mod: $40,000 × 1.20 = $48,000 (an $8,000 surcharge). Trap: The mod multiplies the manual premium before applying scheduled credits/debits or expense constants — order of operations matters.

Drive Other Car and Individual Named Insured

Because a commercial policy is issued to a business entity, the owner driving a non-owned private vehicle on personal time has no coverage under the BACF. Two endorsements fix this:

• Drive Other Car (DOC) — CA 99 10 extends liability, medical payments, UM, and physical damage to named individuals (and their spouses and family members) while using autos the business does not own. It effectively gives an executive the personal-auto-style protection their company policy otherwise lacks.
• The Individual Named Insured endorsement (CA 99 17) broadens a policy issued to a sole proprietor so that family members and personal use are treated more like a personal auto policy.

Exams pair these with a fact pattern of a company owner who has no personal auto policy and is hurt in a borrowed car — DOC is the answer.

Additional-Insured and Waiver Endorsements

Commercial contracts routinely require a business to name a customer or landlord as an additional insured on its auto policy. CA 20 01 (Lessor – Additional Insured and Loss Payee) adds the owner of a long-term leased vehicle, and broad-form additional-insured endorsements extend liability protection to a party for whom the named insured performs work.

A waiver of subrogation endorsement (CA 04 44) gives up the insurer's right to recover from a specified party after it pays a claim — common when a contract forbids the business from suing its client. The exam tests the consequence: once subrogation is waived against a party, the insurer cannot pursue that party even if that party caused the loss, so the premium reflects the surrendered recovery. Pair this with the experience-modification discussion: clean loss runs and waived recoveries both feed into the rate a commercial fleet ultimately pays.

Hired-Auto Physical Damage and Loss Payees

Because Symbol 8 (hired autos) is a liability symbol, a business that rents vehicles still has no payment for damage to the rented vehicle itself unless it adds hired-auto physical damage. This endorsement is the exam-correct answer whenever a fact pattern shows a company renting trucks and then damaging one — liability under Symbol 8 responds to others, but the rented truck's own damage needs the physical-damage add-on (often subject to a stated limit per vehicle).

A loss-payable endorsement protects a lender's interest in a financed vehicle, paying the lienholder its share of any physical-damage loss. The exam distinguishes a loss payee (a creditor with a financial interest in physical-damage proceeds) from an additional insured (a party given liability protection). Mixing the two is a classic distractor: a bank financing a truck is a loss payee, while a customer requiring contractual coverage is an additional insured.