Standard Mileage vs. Actual Expenses Calculator — guide

The calculator asks for your business miles, your business-use percentage, and a set of actual vehicle expenses (fuel, insurance, maintenance, registration, depreciation, and financing). It then estimates both methods:

Standard method: business miles × IRS standard mileage rate.

Actual method: sum of entered vehicle expenses × business-use percentage.

The two totals appear side by side so you can compare the estimated deduction each method would produce for your inputs.

Self-employed individuals and small business owners deciding which vehicle deduction method to use for their tax return.

Anyone wanting a rough sense of whether the standard mileage or actual expense approach is likely to be more advantageous given their driving pattern and vehicle costs.

Tax professionals or bookkeepers doing a preliminary comparison for a client.

Required — Business miles: miles driven for business during the period.

Required — Business-use percentage: the proportion of total vehicle use that is business-related. Use the Business vs. Personal Mileage Calculator to derive this figure.

Optional — Actual expenses: fuel costs, auto insurance premiums, maintenance and repairs, vehicle registration fees, depreciation estimate, and loan interest or lease payments. Enter the amounts you actually paid — do not pre-scale by business-use percentage, as the tool does that automatically.

Optional — Tax year: determines the IRS rate used for the standard method estimate.

Standard method estimate: business miles × IRS standard business mileage rate for the selected year (2024: $0.67/mi; 2025: $0.70/mi; 2026 H1: $0.725/mi; 2026 H2: $0.76/mi).

Actual method estimate: (sum of all entered actual vehicle expenses) × business-use percentage. This represents the portion of vehicle costs attributable to business use.

The tool does not account for depreciation method elections (MACRS, Section 179, bonus depreciation) or prior-year depreciation — factors that significantly affect which method is available and advantageous.

The results panel shows both estimated deduction amounts in a side-by-side layout. The higher figure is highlighted, but this does not mean you should automatically choose that method — switching methods has restrictions, and your prior filing history constrains your options.

Read the result as: 'Based on these inputs, the [standard/actual] method produces a larger estimated deduction.' Nothing more.

Scenario: 10,000 business miles in 2025, business-use 67%.

Actual vehicle expenses: fuel $2,400, insurance $1,800, maintenance $900, registration $200, depreciation $4,000, financing $3,600. Total: $12,900.

Standard method estimate: 10,000 × $0.70 = $7,000.

Actual method estimate: $12,900 × 67% = $8,643.

In this example, actual expenses produce a higher estimated figure — but whether actual expenses are available and appropriate for your filing requires professional advice.

The tool does not account for prior-year MACRS depreciation claimed, which can disqualify the standard mileage method.

Depreciation is complex — the tool accepts a simple annual figure but does not guide you in calculating it under any IRS method.

The tool does not model SE tax, AGI phase-outs, or any other element of your full tax return.

This is a side-by-side estimate, not a professional recommendation.

Whichever method you use, you need the evidence — mileage logs and expense receipts. MileLedger keeps miles, receipts, and exports together so you or your tax professional have everything in one place.

Learn more at /features/tax-ready.