2026 Mileage Deduction Calculator

What is a mileage deduction?

A business mileage deduction lets you calculate a tax deduction for eligible miles you drive for business. This calculator uses the IRS standard mileage rates for 2026: 72.5 cents per mile for miles driven from January 1 through June 30, and 76 cents per mile from July 1 through December 31.

Enter your business miles for each period. The calculator multiplies each amount by its period’s rate, then adds the two amounts. It estimates the deduction, not your tax savings or refund. Your actual tax savings depend on your tax situation and whether the miles qualify.

Why your business mileage deduction matters

If you drive for work, eligible mileage can affect your taxable business income. Keeping a clear record helps you report the deduction accurately and gives you a better view of what business travel costs. That can inform decisions such as whether to visit a client in person, schedule several business stops together, or price travel into a service.

The rate changes during 2026, so applying one rate to all your miles can produce the wrong estimate. Separating miles by the date you drove keeps the calculation aligned with the two rates. The calculator does not decide whether a trip qualifies or whether the standard mileage method is the right choice for you. Confirm your approach with a qualified tax professional.

How to use this mileage deduction calculator

1. Add your eligible business miles driven from January 1 through June 30 in the first field.
2. Add your eligible business miles driven from July 1 through December 31 in the second field.
3. Review the total deduction and the separate amount calculated for each period. Check that your mileage records cover the dates and trips included.
4. Use the estimate to plan and organize your tax records. Before filing, confirm that your trips qualify and that the method fits your situation with a qualified tax professional.

2026 mileage deduction example

How to read your mileage deduction result

The total is the estimated deduction from the miles and rates entered. The period subtotals show how much comes from each half of the year. If one subtotal seems unexpectedly high or low, check the miles entered for that period and make sure you did not include personal driving.

A deduction is not the same as a tax credit or a dollar-for-dollar payment from the IRS. It reduces income subject to tax if the miles qualify and you meet the relevant requirements. Your result also does not compare the standard mileage method with other eligible ways of accounting for vehicle expenses. Ask a tax professional to review that decision and your records.

How to make your mileage estimate more useful

1. 01

   Record trips as you take them

   Write down the date, destination, business purpose, and miles for each work trip. A calendar entry can help you match a drive to a client meeting or other business activity when you review your records later.

2. 02

   Keep business and personal driving distinct

   Do not count personal errands as business travel. If you combine a personal stop with a work trip, record the business portion carefully and ask a tax professional how to treat the trip.

3. 03

   Sort mileage by the date driven

   Keep separate totals for January 1 through June 30 and July 1 through December 31. This makes it easier to apply the correct rate and catch missing trips before you rely on the estimate.

4. 04

   Use the result in operating decisions

   Review how much you drive for client work, deliveries, or site visits. If travel takes time and adds cost, consider grouping appointments, offering remote meetings where suitable, or including travel costs in your pricing.

Common mileage deduction mistakes

• Using one rate for the whole year

  The 2026 business rate changes on July 1. Enter miles in the period when you drove them so each amount uses the applicable rate.

• Counting commuting or personal miles

  A drive does not qualify just because it involves your vehicle or happens on a workday. Keep personal trips separate, and confirm uncertain trips with a qualified tax professional.

• Treating the estimate as a guaranteed tax benefit

  The calculator estimates a deduction from your entries. Eligibility, recordkeeping, your tax situation, and your chosen vehicle-expense method can affect what you may claim.

• Relying on memory instead of records

  Reconstructing trips later can lead to missing or inaccurate mileage. Keep a timely log and supporting calendar or business records.

The mileage deduction formula

Key terms

Business mileage deduction

An estimated tax deduction based on eligible miles driven for business and the applicable mileage rate.

Standard mileage rate

The IRS rate used in this calculator to estimate a deduction for each eligible business mile.

Business mileage log

A record of business trips that can include the date, destination, purpose, and miles driven.