12.2 Commercial Auto Liability and Physical Damage

Key Takeaways

  • Business auto liability is occurrence-based, pays all sums for BI/PD from a covered auto, and defense costs are paid in addition to the limit.
  • Permissive users are insureds; the owner of a borrowed/hired auto generally is not.
  • CSL is one combined limit per accident; split limits (e.g., 100/300/50) cap BI per person, BI per accident, and PD per accident.
  • Physical damage pays the lesser of ACV or repair cost minus deductible; animal strikes and falling objects are comprehensive, not collision.
Last updated: June 2026

Covered Autos Liability Coverage (Section II)

The liability insuring agreement promises to pay all sums an insured legally must pay as damages because of bodily injury or property damage caused by an accident and resulting from the ownership, maintenance, or use of a covered auto. Coverage is on an occurrence basis. The insurer also pays for covered pollution cost or expense (narrowly), and provides a duty to defend, with defense costs paid in addition to the limit.

Who is an insured

  • The named insured for any covered auto.
  • Anyone using a covered auto the named insured owns, hires, or borrows, with permission (the omnibus/permissive-user provision).
  • Anyone liable for the conduct of an insured, but only to the extent of that liability.

Trap: the owner of a borrowed or hired auto is generally not an insured (except certain trailers attached to a covered auto). Employees using their own autos on company business are not insureds under the named insured's auto liability unless hired/non-owned symbols apply, and even then the employee's own auto is not an insured auto for the employee.

Limit of insurance and split vs. combined limits

Business auto liability is most often written with a Combined Single Limit (CSL) — one limit per accident for BI and PD combined, e.g., $1,000,000 CSL. The form's Limit of Insurance condition states the most the insurer pays for all damages in any one accident regardless of the number of insureds, claims, autos, or vehicles involved.

Some risks (and many personal autos) use split limits, written as three numbers such as 100/300/50:

NumberMeaning
100$100,000 bodily injury per person
300$300,000 bodily injury per accident (all persons)
50$50,000 property damage per accident

Worked example (split limits): Three people are injured with claims of $80,000, $120,000, and $60,000. Per-person cap is $100,000, so payable amounts are $80,000 + $100,000 + $60,000 = $240,000 — but the per-accident BI cap is $300,000, so the full $240,000 is paid. If a fourth claim raised the total above $300,000, payment would be capped at $300,000.

Physical Damage Coverage (Section III)

Physical damage covers loss to the covered auto itself and is written per scheduled auto (Symbol 7):

  • Comprehensive — any cause of loss except collision and overturn (fire, theft, vandalism, hail, flood, animal strike, falling objects, glass breakage).
  • Specified Causes of Loss — a named-peril alternative (fire, lightning, explosion, theft, windstorm, hail, earthquake, flood, mischief, vandalism) that is cheaper than comprehensive.
  • Collision — overturn or impact with another object.

Glass breakage may be paid as comprehensive; if it results from a collision, the insured may elect to treat it as collision. Loss caused by hitting a bird or animal, and by falling objects, is comprehensive (not collision) — a frequently tested distinction.

Valuation, deductibles, and ACV

The physical damage loss condition pays the lesser of the actual cash value (ACV) of the damaged property or the cost to repair or replace it with like kind and quality, minus the deductible. ACV is replacement cost minus depreciation.

Worked ACV example: A box truck has a replacement cost of $60,000 and is 40% depreciated, so ACV = $60,000 - $24,000 = $36,000. It is a total loss. The collision deductible is $1,000. The insurer pays $36,000 - $1,000 = $35,000, even if repair would cost more, because the lesser of ACV or repair cost governs.

Comprehensive often carries no deductible for glass, and a towing and labor add-on (per disablement, up to a small stated limit such as $75) can be scheduled. The deductible is applied per occurrence, per auto.

BACF Liability and Physical Damage Structure

Business Auto liability pays sums the insured is legally liable to pay for bodily injury and property damage caused by an accident and resulting from the ownership, maintenance, or use of a covered auto, plus defense outside the limit. It typically uses a Combined Single Limit (CSL) rather than split limits.

Physical damage mirrors the personal auto split:

CoveragePays for
ComprehensiveAll loss except collision/overturn (theft, fire, flood, hail, animal)
Specified Causes of LossA named-peril alternative cheaper than comprehensive (fire, theft, windstorm, flood, vandalism, etc.)
CollisionUpset or impact with another object/vehicle

The form also provides Towing for private passenger autos and transportation expense/loss of use sublimits.

Exam trap: Specified Causes of Loss is a named-peril, lower-cost alternative to Comprehensive - it covers fire, lightning, explosion, theft, windstorm, hail, earthquake, flood, mischief, and vehicle sinking/collision-of-conveyance, but not the broad "all other" causes Comprehensive includes (such as hitting an animal in some readings). Business auto liability is most often written on a CSL basis, simplifying the per-person/per-accident analysis used in personal lines.

Settlement, Deductibles, and the Combined Single Limit

Business auto physical damage settles like the PAP - the lesser of ACV or repair/replacement cost, less the deductible, with the insurer taking salvage on a total loss. Comprehensive and collision deductibles apply per vehicle, while Specified Causes of Loss is the budget named-peril alternative. The Combined Single Limit simplifies liability: one pooled amount covers all BI and PD per accident, so the per-person caps of split limits never trap a severely injured claimant.

Exam tip: A Combined Single Limit (CSL) of, say, $1,000,000 can pay any mix of BI and PD up to that total in one accident - far more flexible than 25/50/25 split limits, which is why fleets use it. Remember that Specified Causes of Loss is named-peril and cheaper than Comprehensive: it lists fire, lightning, explosion, theft, windstorm, hail, earthquake, flood, mischief/vandalism, and the sinking/derailment of a conveyance, but omits the broad "all other accidental" causes Comprehensive grants.

Test Your Knowledge

A covered truck strikes a deer, suffering $4,000 in damage. The policy has comprehensive with a $500 deductible and collision with a $1,000 deductible. How is the loss adjusted?

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B
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D
Test Your Knowledge

A policy carries split limits of 100/300/50. An accident injures two people with claims of $150,000 and $90,000. How much bodily injury is payable?

A
B
C
D