3.3 Personal and Commercial Auto Coverages

Key Takeaways

  • The Personal Auto Policy (PAP) has four coverage parts: Part A Liability, Part B Medical Payments, Part C Uninsured/Underinsured Motorists, and Part D Coverage for Damage to Your Auto.
  • Part D splits physical damage into Collision and Other-Than-Collision (comprehensive), each subject to a deductible; OTC covers fire, theft, glass, flood, and animal strikes.
  • Liability limits are written as split limits (e.g., 25/50/25 = $25,000 per person / $50,000 per accident BI / $25,000 PD) or as a single Combined Single Limit (CSL).
  • The Business Auto Policy (BAP) uses numeric covered-auto symbols (1 = any auto, 7 = specifically described, 8 = hired, 9 = non-owned) to designate which autos a coverage applies to.
  • Financial responsibility / compulsory insurance laws set state-mandated minimum liability limits drivers must carry.
Last updated: June 2026

The Personal Auto Policy (PAP)

The Personal Auto Policy (PAP) is the standard ISO contract covering private passenger autos owned by individuals and married couples. It is organized into four coverage parts, each separately insured and limited:

PartCoverageWhat it does
Part ALiabilityPays bodily injury (BI) and property damage (PD) the insured is legally liable for; includes defense costs.
Part BMedical PaymentsPays reasonable medical/funeral expenses for the insured and passengers, regardless of fault.
Part CUninsured/Underinsured MotoristsPays the insured's damages when the at-fault driver has no or insufficient insurance.
Part DCoverage for Damage to Your AutoPhysical damage to the covered auto — Collision and Other-Than-Collision.

The policy defines covered persons and covered autos differently for each part — a frequent source of exam questions.

Covered Persons, Covered Autos, and Liability Limits

Who and What Is Covered

Under Part A, an insured includes the named insured and resident family members for any auto, plus any person using the covered auto with permission. A covered auto includes vehicles shown on the declarations, newly acquired autos, trailers owned, and certain temporary substitute autos.

Split Limits vs. Combined Single Limit

Part A liability is most often written on a split-limits basis, shown as three numbers such as 25/50/25:

  • $25,000 — maximum BI per person.
  • $50,000 — maximum BI per accident (all injured persons combined).
  • $25,000 — maximum property damage per accident.

Alternatively, a Combined Single Limit (CSL) — for example $100,000 — is a single pool that applies to BI and PD combined for any one accident, giving more flexible, often broader protection. Under a CSL there is no separate per-person cap, so a single severely injured claimant can access the full limit.

Part C, Part D, and No-Fault Distinctions

Part C — Uninsured / Underinsured Motorists

  • Uninsured Motorist (UM) — pays the insured's BI (and, where offered, PD) when the at-fault driver carries no insurance or is a hit-and-run.
  • Underinsured Motorist (UIM) — applies when the at-fault driver has insurance but with limits lower than the insured's damages; UIM fills the shortfall up to the insured's UIM limit.

UM/UIM pays only amounts the insured is legally entitled to recover from the other driver.

Part D — Coverage for Damage to Your Auto

Part D is physical damage coverage and is split into two perils, each with its own deductible:

  • Collision — impact with another vehicle or object, or upset (rollover).
  • Other-Than-Collision (OTC / "comprehensive") — virtually all other direct loss: fire, theft, vandalism, glass breakage, flood, hail, falling objects, and contact with a bird or animal.

A practical exam trap: hitting a deer is Other-Than-Collision, not Collision.

Commercial Auto and Financial Responsibility

The Business Auto Policy (BAP)

Organizations insure vehicles under the Business Auto Policy (BAP). Rather than naming each vehicle in every coverage, the BAP uses numbered covered-auto symbols in the declarations to designate which autos a given coverage applies to:

SymbolMeaning
1Any auto (broadest — used for liability).
2Owned autos only.
7Specifically described (scheduled) autos.
8Hired autos only.
9Non-owned autos only (e.g., employees' personal cars used for business).

Liability is commonly written with Symbol 1 (any auto), while physical damage is usually limited to Symbol 7 scheduled vehicles.

Financial Responsibility and Compulsory Limits

Every state has a financial responsibility law or compulsory insurance law requiring drivers to demonstrate the ability to pay for harm they cause — almost always satisfied by carrying liability limits at or above a state-mandated minimum. A policy written below those minimums does not satisfy the law. Some states are no-fault, requiring Personal Injury Protection (PIP) that pays an insured's own medical and wage losses regardless of who caused the accident, while restricting lawsuits for smaller injuries.

Key PAP Exclusions and Other Provisions

Like the CGL, the PAP narrows its broad grant of coverage with exclusions. Liability under Part A is excluded for intentional injury, for autos used as a public or livery conveyance (such as a taxi or ride-share for hire), for vehicles with fewer than four wheels (motorcycles), and for damage to property the insured owns or is transporting. Part D physical damage excludes wear and tear, mechanical breakdown, road damage to tires, and loss to electronic equipment not permanently installed.

The PAP also provides important transportation/towing and rental reimbursement options, and extends physical damage to a newly acquired auto for a limited number of days. Because personal auto remains the single largest line of property-casualty premium in most states, candidates should be able to match a given accident scenario to the correct part and peril — distinguishing, for example, a liability claim (Part A) from a comprehensive theft loss (Part D) or an uninsured-driver injury (Part C).

A useful mental model: Part A pays others for harm the insured causes, Part B and Part D pay the insured's own injuries and vehicle, and Part C steps in when the other at-fault driver cannot pay.

Test Your Knowledge

A driver's PAP shows liability limits of 25/50/25. Three passengers in the other car are injured, with the most severely hurt incurring $40,000 in bodily injury damages. What is the most Part A will pay that one person?

A
B
C
D
Test Your Knowledge

An insured swerves to avoid a dog and a deer leaps out and strikes the front of the car, causing $3,000 in damage. Under the PAP, this loss is covered by:

A
B
C
D
Test Your Knowledge

A business wants its auto liability coverage to apply to ALL autos — owned, hired, and non-owned. Which Business Auto Policy covered-auto symbol provides this?

A
B
C
D