What is a fleet discount, and do all fleets qualify?

Many carriers offer a discount once you insure a minimum number of vehicles (commonly 3 or 5+) under one policy, reflecting lower per-vehicle administrative cost and often better claims data. Whether you qualify and by how much varies by carrier — check your specific quote or ask your agent.

How long does an at-fault accident affect my premium?

This varies by carrier and state, but a common pattern is that at-fault accidents affect pricing for 3-5 years before dropping off. Some carriers weight recent accidents more heavily than older ones within that window rather than applying a flat surcharge for the whole period.

Insurance & Risk

Commercial Auto Insurance Fleet Premium Estimator

Estimate your fleet's annual premium from a base per-vehicle rate, discounts, and accident surcharges.

Formula reviewed against standard commercial auto insurance premium estimation factors · Last checked Aug 2026 · methodology

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Formula

Discounts and surcharges on your base rate

Premium = Vehicles × Base Rate × (1 − Discounts% + Surcharges%)

Base fleet premiumNumber of vehicles × your quoted or reference base rate per vehicle

DiscountsFleet size discount plus any safety/telematics program discount

SurchargesAt-fault accidents × your carrier's stated per-accident surcharge

FAQ

Common questions

Real commercial auto premiums depend on underwriting data — state, garaging ZIP code, vehicle type, driver motor vehicle records, radius of operation, cargo carried, and liability limits — that no public formula can replicate. This tool takes your actual quote or a published state-average figure as an input and does the fleet-level discount and surcharge math around it.

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