Units of Production

The 2025 IRS Standard Mileage Rate vs. Actual Per-Mile Depreciation

For 2025, the IRS set the standard mileage rate for business driving at 70 cents per mile—up from 67 cents in 2024. This all-in rate bundles fuel, insurance, maintenance, and depreciation into a single per-mile deduction, making recordkeeping simple. However, the embedded depreciation component within those 70 cents is approximately 27–28 cents per mile based on IRS actuarial estimates, meaning the remaining ~42 cents covers operating costs. If your vehicle depreciates faster than average—common with luxury SUVs and high-mileage commercial trucks—the actual expense method can yield a meaningfully larger deduction.

Consider a delivery van purchased for $42,000 with an estimated life of 200,000 miles and a $2,000 salvage value. The depreciable base is $40,000, and the per-mile depreciation rate is $0.20 per mile. If the driver logs 30,000 miles in Year 1, the depreciation expense is $6,000—compared to only $5,040 using the IRS embedded rate (30,000 × $0.168 estimated depreciation component). The gap compounds over time for high-utilization vehicles.

When the Units-of-Production Method Outperforms Straight-Line

Time-based methods (straight-line, MACRS) charge the same depreciation regardless of whether a vehicle sat idle or ran full tilt. The units-of-production (UOP) method—which per-mile depreciation is a variant of—solves this mismatch by tying expense directly to usage. This matters most for:

• Seasonal businesses (landscaping, snow removal) where vehicles sit for months at a time. UOP charges nothing during idle months, keeping book value higher until the vehicle actually wears.
• Shared fleet vehicles where different drivers log vastly different mileage. Cost allocation per vehicle becomes accurate rather than arbitrary.
• High-residual vehicles driven few miles. A collector car used occasionally depreciates very slowly under UOP, preserving book value in line with actual market reality.

Practical Fleet Cost Benchmarks by Vehicle Category

Industry fleet benchmarks (American Automobile Association, 2024) put average depreciation costs at roughly $0.11 per mile for compact sedans,$0.16 per mile for mid-size SUVs, and $0.22–$0.28 per mile for full-size pickup trucks and cargo vans. Luxury vehicles often exceed $0.35 per mile due to steep initial value drops—a $75,000 Mercedes-Benz Sprinter can lose $15,000–$18,000 in Year 1 alone. Using these benchmarks to set your per-mile rate in this calculator produces realistic depreciation schedules that hold up under IRS scrutiny and support accurate vehicle replacement budgeting.