IRS Mileage Deduction Calculator

Maximizing Your IRS Mileage Deduction in 2026

The IRS Mileage Deduction Calculator helps individuals and businesses estimate their deductible vehicle expenses for business, medical, or charity purposes using the 2026 IRS standard mileage rates. By inputting annual miles driven, marginal tax rate, and mileage category, the tool instantly calculates the total mileage deduction and estimated tax savings.

For example, a freelancer driving 5,000 business miles at the 2026 rate of $0.725/mi can claim a $3,625 deduction, saving $797.50 in federal taxes at a 22% marginal rate.

2026 IRS Standard Mileage Rates

The IRS sets standard mileage rates annually based on a study of vehicle operating costs.

For 2026, the rates are:

• Business: $0.725 per mile (up from $0.70 in 2025)
• Medical/Moving: $0.205 per mile (down from $0.21 in 2025)
• Charity: $0.14 per mile (set by statute, unchanged)

These rates cover fuel, maintenance, depreciation, insurance, and other vehicle operating costs.

The business rate is the highest because it includes both fixed and variable costs, while the medical rate covers only variable costs.

How to Calculate Your IRS Mileage Deduction

The IRS mileage deduction calculation is straightforward:

Mileage Deduction = Annual Miles Driven × IRS Standard Rate

Estimated Tax Savings = Mileage Deduction × Marginal Tax Rate

Net Cost Per Mile = IRS Rate × (1 - Marginal Tax Rate)

For instance, if you drive 5,000 business miles at the 2026 rate of $0.725/mi, your deduction is $3,625.00.

At a 22% marginal tax rate, your tax savings are $797.50, and your effective net cost per mile drops to $0.566.

Calculating a Business Mileage Deduction for a Freelancer

Consider a freelance graphic designer who drove 5,000 miles for client meetings and business-related errands during the 2026 tax year.

Their federal marginal income tax rate is 22%.

They select the "Business" mileage category, which uses the 2026 IRS standard business mileage rate of $0.725 per mile.

1. Calculate the Mileage Deduction: 5,000 miles × $0.725/mile = $3,625.00.
2. Estimate Tax Savings: $3,625.00 × 0.22 = $797.50.
3. Determine Net Cost Per Mile: $0.725 × (1 - 0.22) = $0.725 × 0.78 = $0.566/mile.

This freelancer can claim a $3,625.00 deduction, leading to an estimated $797.50 in tax savings, making their effective cost of driving for business just $0.566 per mile — a 22% reduction from the standard rate.

IRS Rules and Regulations for Mileage Deductions

The Internal Revenue Service (IRS) sets specific rules for claiming mileage deductions, primarily outlined in Publication 463, "Travel, Gift, and Car Expenses." To qualify, mileage must be ordinary and necessary for your business, medical, or charitable activities.

Taxpayers must maintain meticulous records, including the date, destination, purpose of the trip, and the starting and ending odometer readings for each journey. The IRS allows taxpayers to choose between the standard rate and the actual expense method (tracking gas, oil, repairs, insurance, depreciation, etc.). However, if you use the standard mileage rate in the first year a vehicle is used for business, you may switch between methods in later years. If you use actual expenses first, you are locked into that method for the vehicle's lifespan.

Comparing Mileage Rates by Category

The 2026 business rate ($0.725/mi) is significantly higher than the medical ($0.205/mi) and charity ($0.14/mi) rates because business mileage covers both fixed costs (insurance, registration, depreciation) and variable costs (fuel, maintenance), while medical mileage covers only variable costs. The charity rate is set by statute at $0.14/mi and rarely changes.

For perspective, driving 5,000 miles for business yields a $3,625 deduction, while the same miles for charity produce only a $700 deduction — a $2,925 difference. This highlights the importance of accurately categorizing your trips and maintaining separate logs for each purpose.