Mileage Calculator

How the Standard Mileage Method Works

The IRS standard mileage method multiplies the number of business miles you drove during the year by a single per-mile rate set annually by the IRS, producing your deductible expense (for self-employed filers) or the tax-free amount an employer can reimburse without it counting as wages. As an example rate, this calculator defaults to $0.67 per mile, the IRS standard business mileage rate for 2024 — this figure changes every year (and occasionally mid-year), so always confirm the current rate on IRS.gov before filing or setting a reimbursement policy. The formula itself is simple: deduction = business miles × rate, then subtract any amount your employer already reimbursed you to find the net deductible balance.

This Is Not a Fuel Efficiency Calculator

"Mileage" here means the dollar value of business driving for tax and reimbursement purposes — it has nothing to do with miles per gallon or fuel spending. If you're trying to measure how efficiently a vehicle burns fuel, use the gas mileage calculator instead, and if you want to estimate what a trip will cost in fuel dollars, try the fuel cost calculator. The standard mileage rate already bakes in an IRS estimate of fuel, maintenance, depreciation, and insurance combined — it is a substitute for, not a supplement to, tracking those costs separately.

Standard Mileage vs. Actual Expenses

Taxpayers generally choose between two methods: the standard mileage rate used here, or tracking actual vehicle expenses (gas, repairs, insurance, depreciation) and deducting the business-use percentage of the total. The standard method is simpler and often favored for its lower recordkeeping burden, but whichever you choose, keep a contemporaneous log of dates, destinations, purposes, and odometer readings — the IRS can disallow the deduction without adequate records even if the math above is correct.