Cost Per Mile Calculator: What Each Mile of Driving Costs

Compare Common Scenarios

How the numbers shift across typical situations for this calculator:

How This Calculator Works

Enter your total vehicle costs for a period and the miles you drove in that same period. The calculator divides one by the other to give the cost per mile — the true running cost that fuel alone badly understates.

The Formula

Cost per Unit

Total Amount is the full cost or price, Quantity is the number of units it covers

Worked Example

A vehicle costing $9,600 a year to run and driven 12,000 miles costs $0.80 per mile. Drivers usually think of fuel alone, but insurance, maintenance, and depreciation often make up most of that figure.

Key Insight

Depreciation, not fuel, is typically the largest cost of driving. That is why cost per mile is the honest number for deciding whether to drive, claim mileage, or take an alternative.

IRS standard mileage rate vs actual cost — which to use

The IRS publishes annual standard mileage rates for tax deduction purposes (2025: $0.70/mile for business use, set annually by IRS Notice). Taxpayers using their personal vehicle for business may deduct $0.70 × business miles, OR they may deduct actual expenses (fuel, maintenance, depreciation) prorated by business-use percentage. The choice between standard mileage and actual expense is made the first year the vehicle is used for business — once made for that vehicle, switching is restricted under §1.274-5(c) of the Treasury Regulations.

For most personal-vehicle owners with low to moderate annual mileage, the standard rate is at or above actual cost — the IRS rate includes generous depreciation amortization that exceeds the true depreciation for low-mileage drivers. For high-mileage drivers (50,000+ miles/year), actual expenses are often higher than the standard rate (more wear and fuel volume), and the actual-expense method produces a larger deduction. AAA's annual 'Your Driving Costs' study provides the actual-expense benchmark.

Critical: the IRS rate does NOT include parking, tolls, or business-purpose finance charges — those are deductible separately above the per-mile deduction. Mileage logs must be contemporaneous (kept at the time of the trip), not reconstructed at year-end — a common audit point. Apps like MileIQ, Stride, and Everlance automate the log and the IRS rate calculation.

EV vs ICE per-mile cost — where the gap closes

Electric vehicles structurally have lower per-mile operating cost than internal combustion vehicles. The U.S. Department of Energy's Alternative Fuels Data Center benchmarks: ICE per-mile fuel cost ~$0.11-$0.18 (gas at $3.50/gal, 22-30 MPG); EV per-mile fuel cost ~$0.04-$0.07 (electricity at $0.16/kWh, 3-4 mi/kWh). The fuel gap is $0.05-$0.12 per mile. Over 100,000 miles, this represents $5,000-$12,000 in fuel savings for an EV.

EV maintenance is also lower — no oil changes, no spark plugs, no exhaust system, regenerative braking reduces brake wear. AAA estimates EV maintenance at $0.06/mile vs $0.09/mile for ICE. Tire wear is comparable but heavier EV weight shortens tire life by 15-20% — a partially offsetting factor.

Where the per-mile gap closes: depreciation. Many EV models have shown faster depreciation than ICE equivalents 2022-2024 due to battery technology evolution and competitive new-model launches. Tesla Model 3, Y, S resale values dropped 25-35% in 2023; many ICE counterparts dropped 10-15%. Over 5 years, EV's lower fuel and maintenance often offset by higher depreciation — total cost per mile is sometimes 10-20% LOWER for EV, sometimes 5-10% HIGHER, depending on model, charging access (home vs supercharger), and driving pattern. Personal calculation required.

Fixed versus variable costs — why your per-mile number falls as you drive more

A vehicle's running costs split into two categories that behave very differently per mile. Fixed costs — insurance premium, registration, license fees, and the time-based portion of depreciation — accrue whether the car sits in the driveway or crosses the country. Variable costs — fuel, tire wear, oil and brake maintenance, and the mileage-based portion of depreciation — accrue only when the wheels turn. When you divide a single annual cost total by miles driven, the fixed component is spread thinner the more you drive, which is why a garage-queen driven 3,000 miles a year can show a per-mile cost above $2.00 while a 25,000-mile commuter in the identical car shows under $0.60.

This matters for the decisions the calculator is meant to inform. For a marginal-trip decision — 'should I drive to the next town or take the train?' — only the variable cost is relevant, because the insurance and registration are already paid regardless. Counting the full all-in per-mile figure overstates the true cost of one additional trip, often by 2-3x. For a total-ownership decision — 'can I afford this car?' — the all-in figure is correct. A common error is using the all-in number for marginal decisions, which makes people avoid worthwhile short trips, or using the variable-only number for ownership decisions, which hides the burden of a rarely-driven second car.

Per-mile vehicle cost by category (AAA / IRS 2024-2025)

Reference per-mile operating cost by vehicle category at 15,000 annual miles. Includes fuel, maintenance, tires, insurance, license, registration and depreciation prorated.

Per-mile cost is sensitive to annual mileage. At 5,000 miles/year, depreciation and insurance amortize over fewer miles, raising per-mile cost by 30-50%. At 30,000 miles/year, the same fixed costs spread further, lowering per-mile cost by 15-25%. Always compute at your actual annual mileage.

Frequently Asked Questions

References & Authoritative Sources

• U.S. Internal Revenue Service (IRS) — Standard Mileage Rates · consulted June 1, 2026 · Annual IRS standard mileage rates — the canonical U.S. reference for per-mile vehicle cost
• U.S. Department of Energy — Alternative Fuels Data Center — Vehicle Cost Calculator and Comparison Tools · consulted June 1, 2026 · Authoritative U.S. government data on vehicle operating costs by powertrain
• AAA (American Automobile Association) — Your Driving Costs — Annual Report · consulted June 1, 2026 · Annual AAA study breaking down per-mile cost by vehicle class and use

Related Calculators

• Auto Loan Calculator
• Unit Price Calculator
• Cost Per Unit Calculator
• All Everyday Tools calculators →

Methodology & Review