12.5 Commercial Auto Endorsements

Tailoring the Commercial Auto Policy

The Business Auto and Motor Carrier forms are routinely modified by ISO endorsements to add coverages, satisfy state law, or restrict scope. Knowing the form numbers and what each does is core exam material. Endorsements attach to the Declarations and override conflicting policy language.

Commonly Tested Endorsements

Memorize the form number and the trigger for each of these high-frequency endorsements.

Drive Other Car and Individual Named Insured

When a company-titled vehicle is the only auto available to an executive (no personal auto policy exists), the Drive Other Car (DOC) endorsement (CA 99 10) extends BAP liability, medical payments, UM/UIM, and physical damage to named individuals when they drive autos not owned by the named insured — closing the gap the personal auto policy would normally fill.

The Individual Named Insured endorsement (CA 99 17) extends coverage to a sole proprietor and family members much like a personal auto policy, useful when an individual owns the business and the autos personally. Both endorsements protect people who would otherwise have no personal coverage because the business owns all the vehicles.

Gap Coverage Worked Example

Auto Loan/Lease Gap (CA 99 33) addresses the shortfall when a financed auto is totaled and the loan balance exceeds ACV. Physical damage pays only ACV, so a heavily financed auto can leave the insured owing the lender.

Worked example: a financed truck is totaled. ACV is $28,000 and the policy has a $1,000 deductible, so the physical damage payment is $27,000. The outstanding loan balance is $34,000. Without gap coverage the insured still owes $34,000 - $27,000 = $7,000. With CA 99 33 the endorsement pays that $7,000 gap, less amounts attributable to overdue payments, carry-over balances from prior loans, and certain fees, which the endorsement excludes.

Pollution and Other Restrictions

The BAP excludes most pollution, but the Pollution Liability - Broadened Coverage for Covered Autos endorsement (CA 99 48) restores coverage for pollution caused by fuels, lubricants, and fluids needed for the auto's operation when escaping from the auto.

Other frequently tested endorsements: Uninsured/Underinsured Motorists (state-specific forms) required to meet compulsory UM/UIM laws, and Personal Injury Protection (PIP) endorsements satisfying no-fault statutes. A trap: standard BAP liability covers pollution from a covered auto's upset/overturn only for substances being transported in limited circumstances; broad mobile-source pollution requires CA 99 48.

High-Frequency Business Auto Endorsements

The Business Auto policy is heavily endorsed, and the exam expects familiarity with the workhorses by name and function. The Drive Other Car (DOC) endorsement (CA 99 10) extends coverage to an individual named insured (often an owner with no personal auto policy) and family members when using autos the business does not own, filling the personal-use gap a commercial-only policy leaves.

The Hired Auto Physical Damage endorsement adds comprehensive and collision on rented or borrowed autos, since the base form's physical damage applies only to scheduled autos. Employees as Insureds (CA 99 33) makes employees insureds for liability when using their own autos on company business, closing a vicarious-liability gap left by the non-owned symbol.

Fleet-management endorsements address composition changes. The Auto Medical Payments (CA 99 03) endorsement adds no-fault medical coverage for occupants of covered autos. Lessor as Additional Insured and Loss Payee protects a leasing company financing the insured's vehicles. Mobile Equipment endorsements clarify when machinery that is sometimes a vehicle and sometimes equipment is covered as an auto.

Rating and territory endorsements also surface. Composite-rated schedules let large fleets pay on a single rate applied to a measure such as revenue rather than per-vehicle premiums, with an audit at period end. The Rental Reimbursement (CA 99 23) endorsement pays a daily allowance for a substitute vehicle while a covered auto is repaired after a covered physical-damage loss.

Worked scenario: a contractor's owner drives only a company truck and has no personal auto policy. While on vacation he rents a car and causes an accident. The base Business Auto policy may not extend to that personal rental use, but a Drive Other Car endorsement on his name would respond, providing the liability and medical coverage a personal auto policy normally would. Recognizing which endorsement repairs which gap (personal use, hired physical damage, employee autos) is the recurring commercial-auto-endorsement question.

Key Takeaways

Business Auto endorsements repair specific gaps: Drive Other Car covers an owner's personal use of non-owned autos, Hired Auto Physical Damage adds comp/collision on rentals, Employees as Insureds closes the employee-driving liability gap, and UM/UIM and PIP endorsements satisfy state mandates. The base form's physical damage reaches only scheduled autos and pollution coverage is narrow, so endorsements like Hired Auto Physical Damage and CA 99 48 are commonly added.