A basic mileage amount is calculated as eligible miles multiplied by the per-mile rate used for that trip. For example, 240 miles at an illustrative rate of $0.60 per mile equals $144. The rate in this example is only arithmetic; it is not a current IRS rate or a recommendation for an employer policy.
Choose the rate that matches the purpose
Reimbursement policies and tax calculations are not automatically the same. An employer may set a policy rate, while a tax calculation may use a rate and eligibility rules for a particular category and effective period. Do not substitute one rate for another just because both are stated per mile.
For U.S. federal standard mileage rates, check the IRS rate table for the correct date period and category. Whether a trip qualifies, whether reimbursement is taxable, and what records are needed depend on the applicable rules and circumstances. The calculator performs the arithmetic; it does not decide eligibility.
Record each trip with its date
If rates change during a year, a trip log with the date of each trip can help apply the rate period associated with that date. Record the trip purpose and miles, then check the category and any separately entered parking or toll amount. Keep source records required by your policy or tax situation; an exported summary is not proof that a trip qualifies.
Use the IRS Mileage Calculator to select a rate period and category for a one-time amount, or enter dated trips in its log. Check the displayed IRS notice and current official rate table when making a time-sensitive calculation.
Keep reimbursement and deduction questions separate
A calculated amount is not automatically reimbursable or deductible. Employer policy, trip purpose, worker status and current tax rules matter. For a tax filing or disputed reimbursement, verify the relevant requirements with an authoritative source or qualified professional.
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