The weight of the truck affects truck insurance rates. Heavier vehicles require higher coverage limits, and so cost more to insure. This is in part due to the amount of damage a heavier vehicle can cause compared to a slower one, as well as the difficulty of stopping suddenly.

The average semi truck insurance costs between $3,000 and $5,000 a year for owner operators that lease on to a motor carrier. For an owner operator with their own authority, the average cost is $9,000-$12,000 per truck.

National average monthly cost for commercial truck insurance ranged from $650 for specialty truckers to $1000 for transport truckers. Remember, these are only averages. Insurance companies use many rating factors to calculate rates, and each can have a big influence on premium.