IRS Mileage Reimbursement Calculator
Calculate your business mileage deduction using the IRS standard rate. Compare standard vs actual expenses, project annual tax savings, and get tips for keeping a compliant mileage log.
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How to Use This Calculator
Mileage Deduction tab
The default tab. Enter your total business miles for the year and confirm the IRS standard rate ($0.725/mile for 2026, IRS Notice 2026-10). The calculator shows your total deduction and estimated tax savings at your marginal federal rate, state rate, and self-employment tax rate if applicable. Expand "More options" to adjust filing status, tax bracket, and state rate.
Standard vs Actual tab
Enter your annual vehicle expenses — gas, insurance, depreciation, maintenance, registration, and parking/tolls. The calculator compares the standard mileage method against the actual expense method and tells you which one saves more. Adjust the business use percentage to reflect your split between business and personal driving.
Mileage Log tab
Project your annual mileage deduction from weekly driving habits. Enter miles per week and weeks worked to see your estimated annual deduction and monthly tax savings. Includes IRS documentation tips — you need a contemporaneous mileage log to claim the deduction.
Share your result
Every input is encoded in the URL. Click Share to send your exact scenario to an accountant, business partner, or tax advisor.
The Formula
The IRS offers two methods for deducting vehicle expenses for business use:
Actual Expense Deduction = Total Vehicle Expenses × Business Use %
Tax Savings = Deduction × (Federal Marginal Rate + State Rate)
+ SE Tax Savings (if self-employed) = Deduction × 15.3% × 50%
The standard mileage rate is simpler — you only need to track miles. The actual expense method requires keeping all vehicle receipts but may yield a larger deduction if your vehicle costs are high relative to miles driven.
Self-employed individuals (Schedule C filers) get an additional benefit: the mileage deduction reduces self-employment tax (15.3%) in addition to income tax. W-2 employees generally cannot deduct mileage since the TCJA suspended unreimbursed employee expense deductions through 2025.
Example
David — Real Estate Agent, Sacramento CA
David is a self-employed real estate agent earning $110,000. He drives a 2022 Honda CR-V for 18,000 business miles per year. California state tax rate: 9.3%. He files as Single.
Standard Mileage Method
Actual Expense Method
The standard mileage method wins by $4,210 ($13,050 vs $8,840). David should use the standard rate — it's simpler and saves more. His $13,050 deduction translates to $5,344 in total tax savings across federal, state, and self-employment taxes.