Symbol 1 – Any Auto
Published: October 7, 2026 · Last reviewed: October 7, 2026 · Est. reading time 10 minutes
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In plain language: Symbol 1 means a commercial auto policy covers liability for any vehicle the business owns, rents, borrows, or has employees drive, even one bought the day of an accident. No vehicle list is required. It is the widest liability coverage symbol an insurer offers on a Business Auto policy.
Technical definition: Symbol 1, designated "Any Auto" on the Business Auto Coverage Form (CA 00 01), extends liability coverage to all autos the named insured owns, leases, hires, or borrows, including newly acquired autos, without requiring individual vehicle description or endorsement. It appears in the Declarations alongside other symbols for physical damage coverages.
Symbol 1 at a Glance
| Attribute | Detail |
|---|---|
| Also known as | Any Auto Symbol, Covered Auto Symbol 1 |
| Category | Commercial auto coverage symbol |
| Lines of business | Business Auto Coverage, Commercial Auto Liability |
| Industries most affected | Trucking, construction, delivery services, property management, staffing firms |
| Related forms or endorsements | CA 00 01 (Business Auto Coverage Form), CA 99 10 (Symbol modification endorsements) |
| Who bears the risk | Insurer, for liability arising from any covered auto, owned or not |
| Common solution | Selecting Symbol 1 on the Declarations page for liability coverage only |
| Also interacts with | Symbol 7 (Specifically Described Autos), Hired and Non-Owned Auto Liability, Garage Coverage Form |
Key Takeaways
- Symbol 1 designates the broadest liability coverage available under a Business Auto policy, automatically covering any owned, hired, borrowed, or newly acquired vehicle.
- Agencies rely on Symbol 1 to eliminate coverage gaps for fleets with frequent vehicle turnover, since no endorsement is needed when a new truck or van is purchased.
- A common misunderstanding is assuming Symbol 1 also covers physical damage on every vehicle; it typically applies to liability only, while physical damage symbols are selected separately.
- Agencies should confirm which symbols apply to which coverage parts on the Declarations page, because a client can carry Symbol 1 for liability but a narrower symbol like Symbol 7 for physical damage.
What Is Symbol 1 in Insurance?
Symbol 1 is one of ten standardized ISO coverage symbols used on the Business Auto Coverage Form to define which vehicles are "covered autos" for a given coverage part. Insurers created the symbol system so agents and underwriters could communicate exactly which vehicles trigger liability, physical damage, or other coverages without rewriting policy language for every account. Symbol 1 exists because fleet operators and businesses with changing vehicle needs cannot practically schedule every vehicle in real time.
The doctrine behind Symbol 1 addresses a basic insurability problem: a business that adds or swaps vehicles constantly cannot wait for an endorsement before driving away in a new truck. By selecting Symbol 1 for liability coverage, the carrier agrees upfront to extend protection to any auto the insured owns, leases, hires, or borrows, including vehicles acquired mid-term, as long as the insured reports new autos as required by the policy's reporting provisions.
Consider a landscaping company that operates six pickup trucks and regularly rents a dump truck for large jobs. With Symbol 1 on the liability section, an accident involving the rented dump truck is covered the same way an accident involving one of the owned pickups would be. Without Symbol 1, the rented truck might fall outside coverage unless a separate symbol, like Symbol 8 for hired autos, had been selected.
How Does Symbol 1 Work?
- The symbol selection. The underwriter and agent choose Symbol 1 on the Declarations page for the liability coverage part, signaling that any owned, hired, or borrowed auto is a covered auto for that coverage.
- The vehicle acquisition or use. The insured acquires a new vehicle, rents one, or has an employee drive a borrowed vehicle for business purposes during the policy period.
- The loss event. A covered auto, regardless of whether it appears on any schedule, is involved in an accident causing bodily injury or property damage to a third party.
- The claim review. The carrier checks the Declarations page, confirms Symbol 1 applies to the liability coverage part, and verifies the vehicle meets the "any auto" definition under the policy.
- The coverage response. The carrier extends liability defense and indemnity for the loss, since Symbol 1 does not require the vehicle to have been specifically described or previously reported.
Real Claim Examples Involving Symbol 1
Rental truck accident during a seasonal rush
A moving company with Symbol 1 liability coverage rented an extra box truck during a busy summer week. An employee driving the rental caused a rear-end collision injuring another driver. Because Symbol 1 covered any auto, including rentals, the carrier accepted the liability claim without requiring a separate hired-auto endorsement.
Newly purchased delivery van not yet reported
A courier service purchased a new delivery van and put it into service immediately, before notifying the agency. The van was involved in a pedestrian injury claim three days later. Symbol 1 covered the new auto automatically under the Business Auto Coverage Form's automatic coverage provision for newly acquired autos, avoiding a coverage gap despite the delayed notice.
Borrowed equipment trailer causing a highway incident
A construction firm borrowed a flatbed trailer from a supplier to haul equipment and the trailer detached, striking another vehicle. Because the firm's policy used Symbol 1 for liability, the borrowed trailer qualified as a covered auto, and the claim was handled under the firm's policy rather than denied for lack of ownership.
Symbol 1 vs. Symbol 7: What Is the Difference?
Symbol 1 and Symbol 7 both define covered autos under the Business Auto Coverage Form, but they sit at opposite ends of the coverage spectrum. Symbol 1 covers any auto automatically, while Symbol 7 limits coverage strictly to autos specifically described on the Declarations page or by endorsement.
| Comparison area | Symbol 1 (Any Auto) | Symbol 7 (Specifically Described Autos) |
|---|---|---|
| Primary use case | Fleets with frequent vehicle turnover or variable rental/borrowed use | Small fleets with a fixed, known set of vehicles |
| Coverage / concept type | Broad, automatic coverage for owned, hired, and borrowed autos | Narrow, schedule-based coverage |
| Typical exclusions | Physical damage unless separately symboled | Any vehicle not listed on the schedule or added by endorsement |
| Who is most affected by errors | Businesses that add vehicles rapidly without reporting | Businesses that forget to endorse a newly purchased vehicle |
| Common mistakes | Assuming Symbol 1 includes physical damage automatically | Assuming an unlisted vehicle is covered because it is similar to a listed one |
What Are the Most Common Mistakes With Symbol 1?
- Agencies assume Symbol 1 extends to physical damage coverage, when it typically applies to the liability coverage part only, leaving comprehensive and collision gaps on unscheduled vehicles.
- CSRs fail to confirm which coverage parts carry Symbol 1 versus a narrower symbol, creating confusion when a client asks whether a new truck has full coverage.
- Producers quote Symbol 1 to reduce endorsement workload without explaining the reporting requirements for newly acquired autos, leaving clients unaware they must still notify the carrier within policy-specified timeframes.
- Account managers assume Symbol 1 covers personal vehicles used for business without reviewing whether the policy structure actually extends to employee-owned autos, which usually requires hired and non-owned auto liability instead.
- Agencies underprice accounts by selecting Symbol 1 without flagging the broader exposure to underwriting, since "any auto" coverage can expose the carrier to more risk than the submission reflects.
How to Explain Symbol 1 to a Client
Explaining Symbol 1 to a personal lines client
Symbol 1 generally will not apply to your personal auto policy, since it is a commercial auto concept. If you drive your own car for a side business or gig work, we need to talk about whether your personal policy excludes that use and whether a commercial or hired/non-owned endorsement makes more sense for you.
Explaining Symbol 1 to a small business owner
Symbol 1 means your liability coverage follows any vehicle your business owns, rents, or borrows, not just the ones listed on your policy. That protects you if you rent a truck for a big job or buy a new van next month. It does not automatically mean every vehicle has physical damage coverage, so we still need to confirm that separately for each vehicle.
Explaining Symbol 1 to a CFO or risk manager
Symbol 1 gives your fleet automatic liability coverage for any owned, hired, or borrowed auto, which reduces the administrative burden of scheduling every vehicle change. It does not replace the need to report newly acquired autos within the policy's required timeframe, and it typically does not extend to physical damage coverage unless that coverage part also carries Symbol 1. We recommend reviewing your Declarations page annually to confirm the symbol selections still match your actual fleet operations and risk appetite.
Frequently Asked Questions About Symbol 1
Does Symbol 1 cover physical damage on all vehicles?
Symbol 1 usually applies to the liability coverage part of the Business Auto Coverage Form, not automatically to physical damage. Physical damage coverage, like comprehensive and collision, is selected with its own symbol, which may be narrower, such as Symbol 7 for specifically scheduled vehicles. Agencies must confirm which symbol applies to each coverage part separately on the Declarations page.
Does a business still need to report new vehicles if it has Symbol 1?
Yes, most Business Auto Coverage Forms require the insured to report newly acquired autos to the carrier within a specified number of days, even though Symbol 1 provides automatic coverage from the moment of acquisition. Failing to report within that window can affect premium calculation and audit results, even if the claim itself was already covered.
Can Symbol 1 cover an employee's personal vehicle used for work?
Symbol 1 alone does not typically extend coverage to employee-owned personal vehicles. That exposure is usually addressed through hired and non-owned auto liability coverage, which businesses should add specifically if employees regularly use personal vehicles for company errands or deliveries.
Why would an underwriter decline to offer Symbol 1?
Underwriters may decline Symbol 1 for businesses with unpredictable or high-risk fleet operations, since it removes the insurer's ability to review and price each vehicle individually before coverage attaches. High-turnover trucking operations, businesses with past loss history, or accounts lacking strong vehicle maintenance records sometimes receive a narrower symbol instead, like Symbol 7 or Symbol 8.
Is Symbol 1 the same as hired and non-owned auto coverage?
Symbol 1 and hired and non-owned auto coverage overlap but are not identical. Symbol 1 as a liability symbol already includes hired and borrowed autos within "any auto," while a separate hired and non-owned auto liability coverage is sometimes purchased independently when a business does not own vehicles at all but still has exposure from rented or employee-driven vehicles.
Sources and References
- National Association of Insurance Commissioners. NAIC homepage.