This calculator helps you determine the deductible amount for business use of your vehicle based on the IRS standard mileage rates for 2025. The standard mileage rate is used to figure the cost of operating a vehicle for business purposes, and it covers depreciation, maintenance, gas, oil, insurance, and registration costs. For 2025, the standard mileage rate for business use is 67 cents per mile.
function calculateMileageDeduction() {
var milesDrivenInput = document.getElementById("milesDriven");
var businessMileageRateInput = document.getElementById("businessMileageRate");
var resultDiv = document.getElementById("result");
var milesDriven = parseFloat(milesDrivenInput.value);
var businessMileageRate = parseFloat(businessMileageRateInput.value);
if (isNaN(milesDriven) || isNaN(businessMileageRate) || milesDriven < 0 || businessMileageRate < 0) {
resultDiv.innerHTML = "Please enter valid positive numbers for miles driven.";
return;
}
var totalDeduction = milesDriven * (businessMileageRate / 100); // Convert cents to dollars
resultDiv.innerHTML = "