The IRS raised the business standard mileage rate mid-year in 2026: 72.5 cents per mile from January through June, then 76 cents per mile from July through December, citing rising vehicle costs. A calculator (or a spreadsheet) still using one flat rate for the whole year will under-claim every trip from the second half.
IRS mileage rate 2026, both periods available
Pick the preset that matches when the miles were actually driven — the calculator applies exactly 72.5¢ or 76¢ per mile depending on which half of the year you select.
Mileage reimbursement calculator, business rate only by default
Medical, moving, and charitable mileage use different rates that this calculator doesn't preset, to avoid showing an unverified number — for those, use the custom rate option with your own figure.
Business mileage calculator, custom rate for anything else
Some employers also set their own reimbursement rate rather than following the IRS figure exactly — the custom option handles that case too, just enter whatever rate applies to you.
