Vehicle Cost Per Mile Calculator — guide

The Cost Per Mile Calculator takes your annual vehicle expenses across all categories and divides the total by the number of miles you drive in a year. The result — cost per mile — is a single figure that represents the true economic cost of operating your vehicle, beyond just the cost of gas.

This figure is useful for comparing against the IRS standard mileage rate, deciding whether a mileage reimbursement offered by an employer covers your real costs, or evaluating whether a different vehicle would be more economical.

Self-employed individuals and contractors who want to understand their true vehicle operating cost before deciding between the standard mileage and actual expense deduction methods.

Delivery drivers and gig workers who want to know their per-mile cost to assess whether a shift is profitable.

Anyone comparing different vehicles for business use.

Employers setting internal mileage reimbursement rates and wanting to base them on real operating costs.

Required — Annual miles: the total miles you expect to drive (or did drive) in the year.

Optional — Fuel cost: total annual spend on gasoline or diesel. Estimate as (annual miles ÷ MPG) × average price per gallon if you do not track fuel precisely.

Optional — Maintenance and repairs: oil changes, tires, brakes, and other service costs for the year.

Optional — Insurance: your annual auto insurance premium.

Optional — Registration and fees: annual vehicle registration, emissions test fees, and similar government charges.

Optional — Depreciation: the estimated annual loss in vehicle value. A simple approach is (purchase price − estimated resale value) ÷ years of expected use.

Optional — Financing: annual interest paid on a car loan or lease payments, if applicable.

Total annual operating cost = fuel + maintenance + insurance + registration + depreciation + financing.

Cost per mile = total annual operating cost ÷ annual miles.

The tool also shows each cost category as a percentage of the total, so you can see which categories dominate your vehicle expenses.

The primary result is your cost per mile — compare this to the IRS standard mileage rate for your tax year to see whether the actual cost approach or standard mileage approach might produce a larger deduction (subject to eligibility rules).

The category breakdown shows, for example, that depreciation and financing often represent the largest share of total vehicle cost — larger than fuel for many drivers, which surprises many people.

Annual mileage: 18,000 miles.

Fuel: $2,400. Maintenance: $900. Insurance: $1,800. Registration: $200. Depreciation: $4,000. Financing (loan interest): $1,200.

Total annual cost: $10,500.

Cost per mile: $10,500 ÷ 18,000 = $0.583 per mile.

Compare to the 2025 IRS standard rate of $0.70/mile: the standard rate exceeds actual cost, suggesting the standard mileage method may produce a larger estimated deduction for this driver — though professional advice is needed before choosing a method.

The tool uses annual totals. It does not prorate by business-use percentage — if you also use the vehicle personally, the cost per mile reflects all driving, not just business miles.

Depreciation is the most difficult figure to estimate accurately. The simple straight-line approach used in the worked example differs from IRS MACRS depreciation, which accelerates depreciation in early years.

The tool does not model vehicle-specific factors such as luxury vehicle depreciation caps, which limit the depreciation amount claimable on expensive vehicles.

Knowing your cost per mile is most useful when paired with accurate mileage data. MileLedger keeps miles, fuel, and other vehicle expenses in one place so you always have the inputs this calculator needs.

Learn more at /features/expense-management.