Mileage Reimbursement Calculator

What the Mileage Reimbursement Calculator does

Employers reimburse business driving, and the self-employed deduct it, using a rate per mile that covers fuel, wear and depreciation. Multiply business miles by the rate. Comparing the result with the fuel cost alone shows how much of the allowance covers the car’s other running costs.

Formula

• Reimbursement = business miles × rate per mile
• Fuel cost = miles ÷ mpg × fuel price

Worked example

Using the starting values in the calculator above:

How to read the result

Keep a log of date, purpose, start and end points and miles for each trip; it is the evidence tax authorities expect.

Commuting between home and a regular workplace generally does not count as business mileage.

Estimates only, not tax advice. Rates and thresholds change; confirm current figures with your tax authority or adviser.

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