Mileage Reimbursement Calculator

How Mileage Reimbursement Is Calculated

The IRS standard mileage rate is a per-mile amount meant to cover the cost of operating a vehicle for a qualifying purpose, including gas, maintenance, depreciation, and insurance all rolled into one figure. Reimbursement or deduction is simply miles driven for that purpose multiplied by the rate for that purpose — business, medical, moving, or charitable use each have their own published rate.

$$\text{Reimbursement} = \text{Miles Driven} \times \text{Rate per Mile}$$

Worked Example

An employee drives 500 miles for business purposes in a year where the business rate is 72.5 cents per mile. Reimbursement = 500 × 0.725 = 362.50 dollars. The same 500 miles driven for a charitable purpose, at 14 cents per mile, would only yield a 70-dollar deduction — the purpose behind the driving genuinely changes the result, not just a label.

Rate Data Currency

This calculator uses the standard mileage rates published for the 2026 tax year, shown above as "rates last updated." The IRS typically republishes these rates around the start of each calendar year, and occasionally adjusts the business rate mid-year in response to fuel price swings. Because a filing depends on the rate that was actually in effect for the year being filed, always cross-check the current published rate on IRS.gov before using this figure on a real return or reimbursement request — this tool is for quick estimation, not a substitute for the current official rate.

A Brief History of the Standard Mileage Rate

Before the IRS offered any shortcut, deducting vehicle costs for business use meant tracking every actual expense — gas, oil, repairs, insurance, depreciation — and proving it with receipts. The optional standard mileage rate arrived in the early 1970s as a simplified alternative: instead of itemizing every cost, a taxpayer could multiply business miles driven by one published per-mile rate and skip the detailed recordkeeping entirely. The first rate, set in 1971, was 10 cents per mile.

The rate has climbed unevenly since then, tracking the real cost of owning and running a vehicle rather than following any fixed formula — fuel prices are usually the biggest driver of year-to-year changes. Rather than only adjusting once a year as usual, the IRS has occasionally issued a rare mid-year increase during stretches when gas prices spiked sharply enough that the existing rate no longer reflected real driving costs. Separate, lower rates for medical, moving, and charitable mileage were added later, since those purposes cover a narrower slice of a vehicle's total operating cost than ordinary business use.

Common Mileage Deduction Mistakes

Mixing the standard mileage rate with actual-expense deductions for the same vehicle in the same year is not allowed — pick one method and stick with it for that vehicle. Forgetting that commuting mileage (the regular drive from home to a normal workplace) doesn't qualify as business mileage is another common error; only mileage beyond a normal commute, such as driving between job sites or to meet a client, counts. Applying last year's rate to this year's miles, or vice versa, is also easy to do by accident since the rate changes annually.

Mileage Terms You Should Know

Standard Mileage Rate — a fixed per-mile amount published by the IRS, meant to approximate the full cost of operating a vehicle for a qualifying purpose.

Actual Expense Method — an alternative to the standard mileage rate where a taxpayer deducts the actual, itemized cost of operating a vehicle (gas, repairs, depreciation, insurance) instead of a flat per-mile rate.

Qualifying Purpose — the reason for the drive (business, medical, moving for active-duty military, or charitable service), each with its own separate published rate.