The formula
How it works
Work out a mileage reimbursement or expense from the miles you drove and a rate per mile. Enter the distance and the rate — such as the standard business rate — to get the total you can claim.
FAQ
What rate should I use?
Use the rate set by your employer or tax authority. In the US the IRS standard business mileage rate is 67 cents per mile for 2024; medical and charity driving use lower rates. If your employer reimburses at a different rate, enter that instead.
What counts as claimable mileage?
Generally business travel — driving between work sites, to clients or to temporary workplaces — but not your normal commute. Rules vary by country and employer, so keep a log of dates, destinations and distances to support any claim you make.
Does the mileage rate change every year?
Yes — tax authorities like the IRS typically review and adjust the standard rate annually to reflect changes in fuel prices, maintenance and vehicle costs, so check the current rate before filing.
Can I claim mileage if my employer already reimburses fuel separately?
Usually not on top of a separate fuel reimbursement — the standard mileage rate is meant to cover fuel along with wear, maintenance and depreciation, so check your employer’s policy to avoid double-counting.
Is a mileage reimbursement taxable income?
Reimbursement at or below the standard rate is typically not taxed as income, but amounts paid above the standard rate may be treated as taxable — the exact rule depends on your country’s tax code.
How do I calculate the rate per 100 miles shown here?
It is just the rate per mile multiplied by 100, giving a quick reference figure that makes it easier to compare rates or estimate costs for a longer standard trip.
What if I use a personal car for both business and private driving?
Only the business-related miles are claimable, so you need to separate personal trips from business trips in your log and only apply the rate to the business portion.
About the mileage calculator
This calculator works out a mileage reimbursement or travel expense by multiplying the miles you drove by a rate per mile. Many employers and tax systems pay a fixed amount per business mile to cover fuel, wear and running costs, so a quick, accurate total is useful when filing an expense claim or a tax return. Enter your miles and the applicable rate and the amount is calculated instantly.
How to use it
Enter the number of business miles you drove and the reimbursement rate per mile — for example the IRS standard rate. The calculator shows the total you can claim, along with the equivalent per 100 miles. For instance, 500 miles at $0.67 a mile comes to $335. Keep the miles and dates recorded in case you need to justify the claim.
The formula
The reimbursement is simply the miles multiplied by the rate, . Because it is a flat per-mile figure, the amount scales directly with distance — double the miles, double the claim. The standard rate is set to approximate the true cost of running a vehicle, so it already bundles fuel, maintenance and depreciation into one number.
Where it is used
Employees use it to prepare expense claims for business travel, and the self-employed use it to work out the mileage deduction on a tax return. Volunteers may claim charity mileage, and anyone reimbursing a driver — a small business, a club, a car-share arrangement — uses it to settle up fairly. Because the rate is published and the maths is simple, it makes travel costs easy to agree on.