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Borrowed & Rental Vehicles in Washington

When a crash involves a borrowed or rented vehicle, coverage may come from more than one source. The vehicle owner's policy, the driver's own policy, a rental-car policy, a peer-to-peer car-sharing policy, UIM, PIP, collision coverage, umbrella insurance and contractual protection can all occupy different positions. The correct analysis begins with who owned the vehicle, who had permission to drive, and why the vehicle was being used.

Current-law review: Sept. 13, 2026 Borrowed / nonowned vehicles Rental car insurance Peer-to-peer car sharing

A borrowed vehicle can implicate both the owner's policy and the driver's policy

A common mistake is to identify the insurance card for the borrowed vehicle and assume that ends the coverage search.

A borrowed-car crash can involve at least two separate insurance questions:

Vehicle coverage

Owner's policy

Determine whether the driver qualifies as a permissive insured under the policy covering the borrowed vehicle.

Driver coverage

Driver's own policy

Determine whether the driver's personal policy extends liability or other coverage to temporary use of a nonowned automobile.

Coverage-mapping rule: identify the owner, driver, owner's insurer and driver's insurer before deciding which policy applies or which policy is primary.

Permission can determine coverage under the owner's policy

Automobile policies commonly extend liability protection to additional drivers using a covered vehicle with permission.

Washington's Financial Responsibility Act expressly provides this model for certified owner's policies. RCW 46.29.490 requires such a policy to insure both the named insured and another person using the covered vehicle with the named insured's express or implied permission.

As in Guides 02 and 04, RCW 46.29.490 is not a universal omnibus clause automatically inserted into every ordinary private policy. The actual policy must be examined.

Express permission

Permission may be direct: the owner tells the borrower that the borrower may use the vehicle.

Implied permission

Permission also can be inferred from the relationship, prior conduct and surrounding circumstances.

Safeco Insurance Co. v. Pacific Indemnity Co.
66 Wn.2d 38, 401 P.2d 205 (1965)

Washington recognizes that permission under an automobile omnibus clause may be implied from conduct and circumstances rather than stated expressly.

Permission to one borrower does not always authorize a second driver

A difficult coverage problem arises when the vehicle owner lends a car to one person and that person allows someone else to drive.

Hamm v. Camerota
48 Wn.2d 34, 290 P.2d 713 (1955)

Washington held that permission given to the first permittee did not, on those facts, automatically establish that the named insured had also authorized the second driver.

Hunton v. McCarvel
65 Wn.2d 242, 396 P.2d 639 (1964)

Reaffirmed that placing a vehicle in another person's unrestricted possession does not necessarily enlarge the insurance contract to every secondary driver.

For a second permittee, reconstruct the permission chain. Determine what the owner authorized, what prior lending practices existed, whether the owner knew of secondary drivers, and what the policy actually says.

The borrower's own automobile policy may also extend to a nonowned vehicle

Many personal automobile policies provide some liability protection when the named insured or qualifying family member occasionally drives someone else's automobile with permission.

Washington's Office of the Insurance Commissioner describes ordinary bodily-injury liability coverage as commonly protecting the policyholder and listed family members while driving another person's vehicle with permission.

But the actual policy may impose important conditions involving:

  • permission;
  • vehicle type;
  • temporary or occasional use;
  • business use;
  • regular availability;
  • ownership by household members;
  • rental use;
  • primary versus excess insurance; and
  • territorial limitations.
“My insurance follows me” is an oversimplification. Some coverage can follow the person to a nonowned vehicle, but only according to the policy and Washington law.

A car available for regular use is different from an occasionally borrowed car

Nonowned-auto coverage is commonly designed for occasional use rather than allowing one premium to insure every automobile regularly available to the policyholder.

Dairyland Insurance Co. v. Ward
83 Wn.2d 353, 517 P.2d 966 (1974)

Washington described the purpose of a “use of other automobiles” provision as protecting occasional or incidental use of nonowned vehicles while preventing interchangeable use of other readily available automobiles without corresponding premiums.

Grange Insurance Association v. MacKenzie
103 Wn.2d 708, 694 P.2d 1087 (1985)

Enforced a regular-use limitation where the nonowned automobile was furnished for the insured's exclusive and regular use. The relevant focus was regular availability, not merely the purpose for which the vehicle was being driven.

Ask frequency and availability: Was the vehicle borrowed for one trip, available every weekend, supplied for daily commuting, or effectively placed at the driver's disposal?

Different coverages can treat the borrowed vehicle differently

Coverage Question to investigate
Liability Does the owner's policy cover the driver, and does the driver's own policy extend to the nonowned vehicle?
Collision Does the driver's physical-damage coverage extend to a nonowned or rental vehicle, and what deductible applies?
UIM Does the injured person's personal insured status provide UIM protection independent of ownership of the borrowed vehicle?
PIP Does the statutory and policy definition provide PIP under the circumstances, or does an owned/regular-use exclusion apply?
Umbrella Does excess liability protection follow the insured while operating a qualifying nonowned vehicle?

Washington statutes expressly recognize regular-use limits in UIM and PIP

The concept of regular use appears not only in private policy language but also in Washington's statutory framework.

RCW 48.22.030 permits a UIM exception while a person is operating or occupying a motor vehicle owned by or available for the regular use of a named insured or family member when that vehicle is not insured for liability under the policy.

RCW 48.22.090 likewise authorizes specified PIP exclusions involving a vehicle owned by or furnished for the regular use of the named insured or relative when the vehicle is not described on the declarations page of the policy under which the PIP claim is made.

Borrowing one car occasionally and having another car regularly available are materially different coverage facts.

A rental vehicle creates a contract plus an insurance problem

Before driving away from the rental counter, several separate agreements can affect the risk:

  • the rental agreement;
  • the renter's personal automobile policy;
  • insurance purchased from the rental company;
  • credit-card benefits;
  • employer or commercial insurance for business travel; and
  • any umbrella or excess coverage.
Do not treat “rental coverage” as one product. Liability insurance, personal accident insurance, UIM, personal-effects insurance, roadside assistance and contractual protection against damage to the rental vehicle can involve different agreements.

Washington regulates rental-car insurance sold with short-term rentals

Chapter 48.115 RCW governs insurance offered incidentally to qualifying short-term rental-car transactions.

Under RCW 48.115.005, rental-car insurance can include:

  • personal accident insurance;
  • liability insurance;
  • uninsured or underinsured motorist insurance;
  • personal-effects insurance;
  • roadside assistance; and
  • emergency sickness protection.
Washington's rental-car specialty insurance statute generally concerns rental periods of 30 consecutive days or less.

RCW 48.115.025 requires written consumer information when qualifying rental insurance is sold.

The consumer must be told, among other things, that:

  • the offered insurance may duplicate existing coverage;
  • purchase of rental-car insurance is not required to rent the car;
  • rental-company personnel are not qualified to evaluate the adequacy of the renter's existing insurance; and
  • when the rental insurance is not primary, the renter's personal insurance will serve as the primary source of coverage.
Washington itself tells consumers to check existing coverage. The rental counter cannot properly tell the customer that supplemental insurance is mandatory when it is not.

Check the personal auto policy before assuming rental coverage exists

A personal policy may extend important protections to a rental automobile, but the scope differs among carriers and policy forms.

Confirm:

  • whether liability coverage follows the insured to the rental;
  • whether collision and comprehensive coverage extend to it;
  • the deductible;
  • whether the type of rented vehicle qualifies;
  • whether business use changes the result;
  • how long the rental may last;
  • whether another driver is an authorized insured;
  • whether coverage is primary or excess; and
  • which contractual rental charges are excluded.
Do not assume that because your own car has collision insurance, every charge made by a rental company is automatically covered.

Damage to the rental car can involve more than repair cost

The rental agreement may attempt to make the renter responsible for several categories of economic loss after the vehicle is damaged.

Depending on the contract and circumstances, claimed amounts may include:

  • repair or actual-cash-value loss;
  • deductible;
  • towing;
  • storage;
  • administrative charges;
  • loss of use; and
  • diminished value.
Insurance coverage and contractual liability are not identical. Read both the renter's insurance policy and the rental agreement before deciding which claimed charges are insured.

A credit card may also provide rental-vehicle protection, but those benefits are contractual and vary greatly. Determine whether the benefit is primary or secondary, what vehicles and rental periods qualify, and whether use of the particular card to pay for the rental was required.

A rental company is not automatically liable merely because it owns the vehicle

Federal law significantly limits pure ownership-based liability against businesses that rent or lease motor vehicles.

49 U.S.C. § 30106 — Graves Amendment: a qualifying rental or leasing company generally cannot be held liable under state law merely because it owns the rented vehicle when there is no negligence or criminal wrongdoing by the rental or leasing company itself.

The statute preserves state financial-responsibility and insurance requirements.

The Graves Amendment does not immunize a rental company from its own negligence. Negligent maintenance, independent wrongdoing or another legally supported direct-liability theory requires separate analysis.
The driver who caused the crash remains a separate liability target. Do not confuse elimination of pure owner-vicarious liability with elimination of the driver's negligence claim or applicable insurance.

Peer-to-peer car sharing is not ordinary borrowing or traditional rental

Washington created a separate statutory system for peer-to-peer car sharing effective January 1, 2023.

Chapter 46.74A RCW applies when a business platform connects a private vehicle owner with another driver for financial consideration.

During the car-sharing period, RCW 46.74A.020 requires qualifying insurance in amounts no less than twice the minimum amounts provided under chapter 46.29 RCW, and the policy or policies satisfying that requirement are primary during the sharing period.

The required insurance can be maintained by:

  • the shared vehicle owner;
  • the shared vehicle driver;
  • the peer-to-peer car-sharing program; or
  • a combination of those sources.
The owner's ordinary personal auto insurer may exclude car-sharing losses. Washington expressly permits exclusions for liability, PIP, UIM, medical payments, comprehensive and collision coverage during qualifying peer-to-peer sharing.

If the owner or driver's policy that was supposed to satisfy the statutory requirement has lapsed or does not provide the required insurance, the car-sharing program's insurance must provide the required coverage from the first dollar of the claim under the statutory conditions.

Washington requires peer-to-peer sharing records to be preserved

RCW 46.74A.020 requires the sharing program to maintain records concerning vehicle use, including times used, fees and revenue, and to make that information available for a coverage investigation when requested by specified parties and insurers.

For a shared-vehicle crash, preserve the platform timeline immediately. The exact beginning and end of the statutory car-sharing period can determine which insurance is primary.

The car-sharing agreement must also disclose that the owner's personal automobile liability policy may not cover the shared vehicle and that program insurance generally applies only during the defined sharing period.

Build the coverage order rather than assuming which policy is primary

Possible source Coverage question
Vehicle owner's policy Is the driver a permissive insured and are any exclusions applicable?
Driver's personal policy Does nonowned-auto coverage apply, and is it primary or excess?
Rental-company insurance What coverage was purchased and what priority does the contract state?
Peer-to-peer program insurance Was the accident within the statutory sharing period and which policy satisfies RCW 46.74A.020?
Employer / commercial policy Was the borrowed or rented car being used for work or business?
Umbrella / excess policy Does higher-layer protection extend to the nonowned or rented automobile?
Credit-card benefit Does contractual rental-car protection apply, and is it primary or secondary?

Citizen workflow after a Washington borrowed- or rental-vehicle crash

Identify the legal owner of the vehicle. Do not assume the driver and owner are the same person.
Identify every authorized driver. Preserve the permission facts and, for rentals, the written rental agreement.
Obtain the vehicle owner's insurance policy. Determine whether the driver qualifies as an insured.
Obtain the driver's personal automobile policy. Look for nonowned-auto, temporary substitute and other-car coverage.
Determine whether use was occasional or regular. Regular availability can materially alter coverage.
If the vehicle was rented, preserve the entire rental agreement. Include all optional insurance selections and protection products.
Identify every rental-counter insurance product purchased or rejected. Liability, UIM, personal accident and other products are not interchangeable.
Check personal collision and comprehensive coverage. Determine whether it extends to the rental vehicle and which charges it covers.
Check credit-card benefits separately. Preserve the card used for payment and the applicable benefit terms.
Investigate employer or business use. A rented or borrowed vehicle used for work can implicate commercial coverage.
For peer-to-peer sharing, obtain the platform records. Determine the exact statutory sharing period and insurance required by RCW 46.74A.020.
Separate vehicle damage from third-party liability. Different policies and contracts may pay these losses.
Create a primary/excess coverage chart. Do not accept one carrier's characterization of priority without reviewing every applicable policy.

Primary authority behind this guide

RCW 46.29.490 — Certified motor-vehicle liability policies

Provides that a certified owner's policy insures the named insured and qualifying persons operating the covered vehicle with express or implied permission. The statute also separately recognizes certified operator's policies covering use of nonowned vehicles.

Chapter 48.115 RCW — Rental car insurance

Regulates qualifying short-term rental-car insurance transactions, permitted products, disclosures, licensing and sales practices.

RCW 48.115.025 — Rental insurance disclosures

Requires disclosures concerning policy terms, possible duplication of existing insurance, optional purchase, limitations on rental-company insurance advice and priority where the renter's personal insurance is primary.

RCW 48.22.030 — UIM coverage

Governs UIM coverage and includes an express exception involving specified vehicles owned by or regularly available to the named insured or family member but not insured for liability under the policy.

RCW 48.22.090 — PIP exceptions

Permits specified PIP exclusions involving vehicles owned by or furnished for the regular use of the named insured or relative but not listed on the applicable policy.

Chapter 46.74A RCW — Peer-to-Peer Vehicle Sharing Program Act

Establishes Washington's separate insurance, liability, disclosure and recordkeeping system for qualifying peer-to-peer vehicle sharing.

49 U.S.C. § 30106 — Graves Amendment

Limits state-law vicarious liability imposed solely because a qualifying rental or leasing business owns the vehicle, while preserving claims based on the rental company's own negligence or wrongdoing and preserving state financial-responsibility requirements.

Important Washington cases

Dairyland Insurance Co. v. Ward
83 Wn.2d 353, 517 P.2d 966 (1974)

Explains the purpose of nonowned-auto coverage and regular-use limitations: occasional use can be covered without allowing one policy to insure other vehicles that are regularly available.

Grange Insurance Association v. MacKenzie
103 Wn.2d 708, 694 P.2d 1087 (1985)

Enforces a regular-use exclusion where another automobile was furnished for the insured's exclusive, regular use.

Hamm v. Camerota
48 Wn.2d 34, 290 P.2d 713 (1955)

Addresses secondary permittees and confirms that permission to one person does not automatically establish permission from the named insured to every later driver.

Hunton v. McCarvel
65 Wn.2d 242, 396 P.2d 639 (1964)

Further develops Washington law governing secondary drivers and permissive-use coverage.

Safeco Insurance Co. v. Pacific Indemnity Co.
66 Wn.2d 38, 401 P.2d 205 (1965)

Recognizes that permission under an omnibus provision can be implied from the parties' relationship and course of conduct.

Bottom line

A borrowed or rented car creates a coverage map, not a single insurance answer. For an ordinary borrowed vehicle, investigate both the owner's policy and the driver's own nonowned-auto coverage and determine whether permission was express or implied. Distinguish occasional borrowing from a vehicle furnished for regular use. For a rental car, preserve the rental agreement, personal auto policy, optional rental insurance, credit-card benefits and any employer coverage, then separate liability insurance from protection against damage to the rental vehicle. Federal law generally prevents imposing liability on a rental company solely because it owns the vehicle, but not for its own negligence. Peer-to-peer car sharing has its own Washington statutory insurance system and should never be analyzed as though it were simply an informal borrowed-car arrangement.

Public legal education only. Current Washington statutes, federal law, insurance contracts, rental or car-sharing agreements and controlling appellate decisions govern. Borrowed- and rental-vehicle coverage depends on ownership, permission, frequency of use, driver status, policy definitions, business use, contractual terms and the priority provisions of every applicable policy.