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August 1, 2023 - 2 min read

How To Calculate Mileage For Taxes And Reimbursement

Calculating mileage is fairly simple, but you have to input the right rates and the right mileage to get a usable result. See the current standard mileage rates.

And for your mileage log needs we have developed an automatic mileage tracker app, which you can try out for free. It can do the calculations too.

How to calculate mileage reimbursement

Note that if you're an employee, your employer might use a different rate than the one set by the IRS. They may also use a different reimbursement method for your business mileage.

If you use your personal vehicle

You drive your personal vehicle for business, and your company uses the IRS's standard mileage rate to figure out how much you should be reimbursed.

You keep records throughout January 2023, and they show that you've driven 175 miles for business. The 2023 standard mileage rate is 65.5 cents per mile. To find your reimbursement, you multiply the number of miles by the rate:

[miles] * [rate], or 175 miles * $0.655 = $114.63

Try out this calculator to automatically calculate your mileage.

If you use a company vehicle

If you drive a company vehicle for business, and you pay the costs of operating it (gas, oil, maintenance, etc.), you can't use the standard mileage rate. This is because it's meant to cover both the cost of owning and operating a vehicle, but in this case, you only operate it. Your company has instead set a rate of (for example) 21 cents per mile.

To determine your reimbursement, you run the same operation again:

[miles] * [rate], or 175 miles * $0.21 = $36.75.

So here we can see that owning the car you drive for business results in higher reimbursement – but you also have higher costs, especially when you include the car's depreciation.

How to calculate mileage for taxes

As self-employed, you can calculate and claim mileage on your annual tax return. You should use the corresponding year’s mileage rate set by the IRS - e.g. if you are claiming business mileage you’ve driven in 2022, you should be using the IRS 2022 mileage rates.

Example: You have driven 1200 business miles in 2022 with your personal vehicle. The IRS mileage rate in 2022 was 62.5 cents per mile (from July 1, 2022) for owning and operating your vehicle for business purposes.

[miles] * [rate], or 1200 miles * $0.625 = $750 you can claim as deduction on your tax return.

How to calculate business use

If you drive your vehicle for both business and personal purposes, you need to figure out the percentage of business use in order to calculate how much you can claim in mileage reimbursement or deductions. Let's go through a quick scenario.

You've driven 200 personal miles in a given period. During the same period, you've also logged business trips that totaled 100 business miles.

To figure out your business use, divide your business miles by the total number of miles driven. In our example, you've used your car for business 33% of the time: 100/300 = 0.33.

More information on calculating mileage for your situation

For more information on calculating mileage for taxes or reimbursement, we suggest you continue reading our guides as they provide the information necessary for each situation that you will need to take into account. You can also calculate your mileage for taxes or reimbursement by using our mileage reimbursement calculator.

While manually calculating your mileage is not a hard task, it may take a long time throughout the year logging every trip you drive for business purposes. Check out the Driversnote mileage tracking app - you can track mileage automatically, and the app will calculate your reimbursement or deduction amounts for you!


To calculate your reimbursement as an employee, multiply your business-related miles by the mileage rate your employer reimburses you at.
An alternative to the standard rate method for employees is using a flat car allowance, which is a set amount provided by your employer over a set period of time to cover the costs of using your own car for business purposes.
As self-employed, you can choose to deduct mileage either by using the standard mileage rate, or the actual fixed and various costs of running your vehicle for business purposes.

How to automate your mileage logbook

Manually filling out your logbook can get tedious - see how to automatically track trips for your mileage reimbursement or deductions.

This material has been prepared for informational purposes only, and is not intended to provide, and should not be relied upon for, legal, tax or accounting advice. If you have any legal or tax questions regarding this content or related issues, then you should consult with your professional legal, tax or accounting advisor.