Tax Deduction Calculator · 2026

Business Mileage Deduction Calculator 2026

Standard mileage vs actual expense method — side by side so you keep the larger deduction.

Vehicle Usage

Total miles driven this year

Business miles driven

Commuting does not count

Actual Costs (for comparison)

Gas / fuel ($/year)

Insurance ($/year)

Repairs & maintenance ($/year)

Registration & fees ($/year)

Vehicle lease payment ($/year)

Or annual depreciation if owned

Your tax rate (%)

Federal + state combined

Standard Mileage Rate

Business miles—

× 2026 rate (70¢/mi)$0.70

Deduction—

Tax savings—

Actual Expense Method

Total vehicle costs—

Business use %—

Deduction—

Tax savings—

Summary

Business use percentage—

Better method—

Additional deduction vs other method—

Extra tax saved by choosing correctly—

Factor your vehicle deduction into your quarterly estimated payments.

Quarterly Tax Calculator SE Tax Calculator

IRS mileage log requirements: Regardless of which method you choose, the IRS requires a contemporaneous mileage log showing date, destination, business purpose, and miles for every business trip. Apps like MileIQ or Everlance automate this. Without a log, both methods are at risk in an audit — the deduction can be disallowed entirely. Also note: if you use actual expenses in year 1, you must continue with actual expenses for that vehicle in future years (no switching back to standard mileage).