Fleet Insurance Cost Calculator

The deductible discount is capped (at 20% here) because a deductible only shifts the cost of SMALL claims onto the fleet operator -- an insurer's exposure to a total-loss or major-injury claim barely changes no matter how high the deductible goes, so the discount an insurer is willing to offer for a higher deductible levels off well before the deductible itself does. Beyond that point, raising the deductible further mostly just increases the fleet's own out-of-pocket risk without buying much more premium reduction.

Underwriting and administering one policy covering many vehicles costs an insurer less per vehicle than writing and managing many separate small policies -- the fixed costs of underwriting spread across more vehicles. Larger fleets also typically represent a more predictable, diversified risk pool to the insurer (a single bad driver or unlucky incident affects a smaller share of the whole fleet's loss experience), both of which support volume-based pricing breaks once a fleet crosses certain size thresholds.

This calculator uses AVERAGE driver age across the fleet as a single risk input, reflecting the fleet's overall driver risk profile rather than pricing each vehicle individually by its specific driver. Real commercial fleet policies often do go further and price by individual driver records assigned to vehicles, but average age is a reasonable simplified proxy for illustrating how driver risk factors into fleet-wide pricing.

Higher mileage raises the total premium (more time on the road is more exposure to a claim), but the mileage-driven surcharge only kicks in as a percentage adjustment above a threshold, while the denominator (miles driven) keeps growing linearly the whole time. That means the premium grows more slowly than the miles it's divided by, so the per-mile cost of insurance actually falls as utilization increases -- similar to how fixed costs spread thinner per unit as volume grows.