Commercial Auto Insurance Deductibles Explained
How deductibles work, how to choose the right amount, and the real math behind higher vs. lower deductibles.
TL;DR: Commercial auto deductibles range from $250 to $5,000+. The sweet spot for most businesses is $1,000, saving 15-20% vs. $500. Higher deductibles ($2,500) save 25-35% on physical damage premium. Set different amounts for collision and comprehensive based on risk tolerance.
Last updated: April 2026 · Written by the First Heritage Insurance Agency (FHIA) Commercial Insurance Team
What Is a Deductible?
A deductible is the amount you pay out of pocket before your insurance coverage kicks in. On a commercial auto policy, deductibles apply to physical damage coverage (collision and comprehensive), not liability. If you have a $1,000 deductible and your truck sustains $8,000 in collision damage, you pay $1,000 and your insurer pays $7,000.
Common Deductible Amounts
| Deductible | Best For | Premium Impact |
|---|---|---|
| $250-$500 | New/expensive vehicles you cannot afford to repair out of pocket | Highest premium |
| $1,000 | Most common choice; balances premium savings with manageable out-of-pocket | 15-20% less than $500 |
| $2,500 | Businesses with cash reserves that can absorb moderate losses | 25-35% less than $500 |
| $5,000+ | Large fleets that self-insure small losses | 35-50% less than $500 |
The Math: Higher Deductible vs. Lower Premium
Here is a real-world example for a work van with $3,200/year in physical damage premium at a $500 deductible:
- $500 deductible: $3,200/year premium
- $1,000 deductible: $2,720/year premium (saves $480/year)
- $2,500 deductible: $2,240/year premium (saves $960/year)
At the $1,000 level, you save $480/year but take on $500 more risk per claim. If you go claim-free for just over 1 year, the higher deductible pays for itself. At $2,500, you save $960/year but take on $2,000 more risk. If you average less than one claim every 2 years, the higher deductible wins.
Collision vs. Comprehensive Deductibles
You can set different deductibles for collision (accident damage) and comprehensive (theft, weather, vandalism). Many businesses choose a lower comprehensive deductible ($250-$500) and a higher collision deductible ($1,000-$2,500). The logic: comprehensive claims are less frequent and less within your control, so keeping a low deductible protects against random events. Collision claims are more preventable through driver training.
Fleet Deductible Strategies
For fleets of 10+ vehicles, consider:
- Per-vehicle deductibles: Each vehicle has its own deductible amount. Standard approach.
- Aggregate deductibles: One annual deductible pool across the entire fleet. Once total claims exceed the aggregate, all subsequent claims are fully covered. Available from some carriers for larger fleets.
- Self-insured retention (SIR): For very large fleets, a formal SIR reduces premium costs significantly but requires financial reserves to cover claims below the retention level.
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Why Choose FHIA for Commercial Auto Deductibles
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