Where can I find the ISO symbol for a specific vehicle?

ISO symbol assignments are published in the ISO Personal Auto Symbol Guide, available to licensed carriers and rating vendors. Most comparative rating platforms for personal auto incorporate current ISO symbol tables, so entering a vehicle's VIN or make/model/year will automatically retrieve the applicable symbol. Carriers using independent rates may use ISO symbols directly or have developed their own vehicle rating factors with comparable purpose.

Do all states use the same vehicle symbol system?

Most states use ISO's published symbol assignments, but some carriers file independent vehicle rating factors in certain states. States that have mandatory personal auto rate filings require carriers to document their vehicle rating methodology. In practice, the ISO symbol system is so widely adopted that it functions as the de facto industry standard, with independent filings typically developing from the ISO baseline rather than departing from it entirely.

Why might two similar vehicles have different symbols?

Vehicle design details that are not visible in basic specifications can substantially affect symbols. Body style differences (coupe versus sedan versus wagon on the same platform), trim level differences that affect safety equipment, structural materials (steel versus aluminum-intensive construction), and theft rates specific to the model can all create meaningful symbol differences between otherwise comparable vehicles. Checking the specific symbol for the exact make, model, year, and body style is important for accurate rating.

Vehicle Symbol

A code used in personal and commercial auto rating to categorize a vehicle's physical damage risk based on make, model, year, and value.

businessPublished 2026/06/07Last verified 2026/06/07

FAQs

Where can I find the ISO symbol for a specific vehicle?: ISO symbol assignments are published in the ISO Personal Auto Symbol Guide, available to licensed carriers and rating vendors. Most comparative rating platforms for personal auto incorporate current ISO symbol tables, so entering a vehicle's VIN or make/model/year will automatically retrieve the applicable symbol. Carriers using independent rates may use ISO symbols directly or have developed their own vehicle rating factors with comparable purpose.
Do all states use the same vehicle symbol system?: Most states use ISO's published symbol assignments, but some carriers file independent vehicle rating factors in certain states. States that have mandatory personal auto rate filings require carriers to document their vehicle rating methodology. In practice, the ISO symbol system is so widely adopted that it functions as the de facto industry standard, with independent filings typically developing from the ISO baseline rather than departing from it entirely.
Why might two similar vehicles have different symbols?: Vehicle design details that are not visible in basic specifications can substantially affect symbols. Body style differences (coupe versus sedan versus wagon on the same platform), trim level differences that affect safety equipment, structural materials (steel versus aluminum-intensive construction), and theft rates specific to the model can all create meaningful symbol differences between otherwise comparable vehicles. Checking the specific symbol for the exact make, model, year, and body style is important for accurate rating.

Related Terms

Vehicle Symbol

A code used in personal and commercial auto rating to categorize a vehicle's physical damage risk based on make, model, year, and value.

businessPublished 2026/06/07Last verified 2026/06/07

FAQs

Where can I find the ISO symbol for a specific vehicle?: ISO symbol assignments are published in the ISO Personal Auto Symbol Guide, available to licensed carriers and rating vendors. Most comparative rating platforms for personal auto incorporate current ISO symbol tables, so entering a vehicle's VIN or make/model/year will automatically retrieve the applicable symbol. Carriers using independent rates may use ISO symbols directly or have developed their own vehicle rating factors with comparable purpose.
Do all states use the same vehicle symbol system?: Most states use ISO's published symbol assignments, but some carriers file independent vehicle rating factors in certain states. States that have mandatory personal auto rate filings require carriers to document their vehicle rating methodology. In practice, the ISO symbol system is so widely adopted that it functions as the de facto industry standard, with independent filings typically developing from the ISO baseline rather than departing from it entirely.
Why might two similar vehicles have different symbols?: Vehicle design details that are not visible in basic specifications can substantially affect symbols. Body style differences (coupe versus sedan versus wagon on the same platform), trim level differences that affect safety equipment, structural materials (steel versus aluminum-intensive construction), and theft rates specific to the model can all create meaningful symbol differences between otherwise comparable vehicles. Checking the specific symbol for the exact make, model, year, and body style is important for accurate rating.

Related Terms

How It Works / Why It Matters

ISO's symbol system was developed to provide a standardized, actuarially-supported vehicle classification framework that carriers could adopt without independently developing vehicle-specific rating factors. ISO collects physical damage loss data from member carriers, stratified by vehicle make, model, year, and body style, and uses this data to calculate the expected loss cost for each vehicle relative to the average.

A vehicle symbol of 10 means the vehicle's expected physical damage cost is approximately average. A symbol of 15 means physical damage losses are expected to be 50% higher than average. A symbol of 6 means 40% lower than average. The symbol scale is not a direct index but a relative tier system calibrated to loss cost relativities.

The factors that drive vehicle symbol assignments include:

Vehicle value: More expensive vehicles cost more to repair or replace, driving higher symbols

Parts availability and cost: Vehicles with expensive or scarce parts have higher repair costs

Safety equipment: Airbags, anti-lock brakes, and stability control reduce injury claims and may reduce collision frequency

Theft rate: Vehicles with high theft rates carry higher comprehensive symbols

Repairability: Vehicles with aluminum-intensive construction or complex sensors cost more to repair after minor collisions

ISO publishes the Automobile Physical Damage Insurance — Symbol Assignments publication, updated annually as new model years are introduced. Vehicle symbols are effective for the model year they are published for — a 2024 Honda Accord has a defined symbol assignment; a new model that lacks a full year of loss data receives an "introduced" symbol that is updated as data accumulates.

In Practice

Agents working with personal auto or commercial fleet accounts need to understand vehicle symbols because they determine a significant portion of the physical damage premium. A client who purchases a vehicle with a higher symbol than their previous vehicle should expect a physical damage premium increase, even if the vehicle's invoice price is similar.

Commercial fleet operators managing large vehicle inventories use vehicle symbols to evaluate the total cost of ownership including insurance costs. A fleet manager choosing between two cargo vans with different body styles may find that the symbol difference produces a meaningful per-vehicle premium differential across a fleet of 50 vehicles.

Symbol assignments change when vehicles are redesigned. A model that introduces a new platform with significantly different repairability, safety equipment, or structural design may receive a new symbol assignment for that model year that diverges from previous years. Carriers using symbol-based rates need to update their rating tables annually to incorporate new model year assignments.

OEM changes to repair procedures — particularly the shift to more aluminum-intensive and sensor-laden vehicle architectures in recent years — have driven symbol increases for many late-model vehicles. Vehicles with advanced driver assistance systems (ADAS) that require calibration after collision repair carry higher repair costs that feed into symbol assignments.

Telematics rating systems complement vehicle symbols by adding behavioral driving data to the physical damage pricing equation — the same vehicle driven carefully produces fewer collision claims than the same vehicle driven aggressively, a nuance that vehicle symbols alone cannot capture.

Related Concepts

Territory rating and vehicle symbol interact in personal auto physical damage rating: the final rate is the product of the territory factor and the vehicle symbol relativit, applied to the base rate. Both factors must be current and correctly assigned for the calculated premium to accurately reflect the risk.

Vehicle Symbol

FAQs

Related Terms

Territory Rating

Telematics Rating

Rating Factor

Multi-Carrier Quoting

Vehicle Symbol

FAQs

Related Terms

Territory Rating

Telematics Rating

Rating Factor

Multi-Carrier Quoting

How It Works / Why It Matters

In Practice