Free US Mileage Reimbursement Calculator

If you drive for work — even occasionally — the IRS standard mileage rate is one of the simplest, highest-value tax deductions available. For self-employed people it's a direct reduction in taxable income. For employees whose company reimburses, it's tax-free cash back. The math is straightforward; the challenge is tracking the miles. This guide covers what to track, how to track it, and how to claim it.

How the Standard Mileage Rate Works

The IRS normally announces an optional per-mile rate covering vehicle costs such as fuel, insurance, depreciation, maintenance and registration. In 2026 it made a mid-year adjustment: business mileage is 72.5¢ through June and 76¢ afterward. The 2025 rate was 70¢, 2024 was 67¢, and 2023 was 65.5¢.

At 76¢ per mile, 10,000 eligible second-half business miles equals $7,600 of calculated vehicle expense. The tax effect depends on deductibility, business use, other income and applicable federal and state rules.

What Counts and What Doesn't

Counts as business mileage:

• Trips from your principal workplace to a temporary work location (a client's office, a job site, a conference)
• Trips between two business locations in a single day
• Trips to a customer or supplier from your office or job site
• Driving as part of services you provide (rideshare, delivery, real estate showings, sales calls)
• If your home office qualifies as your principal place of business, trips from home to any other work location all count

Does NOT count as business mileage:

• Your commute — driving from your home to your regular workplace and back
• Personal errands during the workday (lunch, gym, dry cleaner)
• Mileage for which you've already been reimbursed by an employer or client
• Mileage that uses a company-provided vehicle (your employer expenses the car directly)

The home office distinction is important. If your principal place of business is genuinely your home office, the trip from home to a client visit is a deductible business trip, not commuting. If your principal workplace is your employer's office, the trip from home to that office is commuting and not deductible — even if you're technically “working” from the moment you leave.

How to Keep a Mileage Log

The IRS doesn't specify a format, but they require “adequate records.” In practice this means:

• Date of the trip
• Starting and ending location (or odometer readings)
• Business purpose (e.g. “client meeting with Acme Corp”)
• Miles driven
• Total annual miles driven (business + personal) — required if you also deduct actual expenses

The records must be made at or near the time of the trip — not reconstructed at tax time. A common rule of thumb: if you log every business trip the day it happens, in any reasonable format, the IRS will accept it on audit. If you try to backfill an entire year's mileage log in April from credit card statements, an auditor may disallow the deduction.

Popular tools: MileIQ (~$60/yr, auto-tracking via phone GPS), Stride (free, manual), Hurdlr (~$60–120/yr, includes income tracking), QuickBooks Self-Employed (~$15/mo, includes broader expense tracking). Or a simple Google Sheet works fine for low trip volumes.

Standard Rate vs. Actual Expenses

The IRS gives you two methods to deduct vehicle costs:

Standard mileage rate: applies the IRS rate for the trip date instead of separately calculating fuel, insurance, repairs, depreciation, oil, tyres and registration. You still need contemporaneous mileage and business-purpose records.

Actual expenses: add up gas receipts, insurance premiums, maintenance, depreciation, lease payments, etc. Multiply by your business-use percentage. More paperwork. Better for expensive vehicles or vehicles with above-average operating costs.

The break-even point is roughly $0.70 ÷ (your actual cost per mile). For someone driving a Toyota Corolla averaging 35 mpg with cheap insurance, actual expenses might be ~$0.45/mile — meaning standard rate is significantly better. For someone driving a luxury SUV averaging 18 mpg with high insurance, actual might be $0.85/mile — meaning actual is better. Calculate both and use the higher one if you have records to support actual expenses.

Important rule: if you use the standard rate the first year a vehicle is placed in service, you can switch to actual expenses in any later year. But if you start with actual expenses, you generally cannot switch to standard later (a depreciation-method lock-in). This makes the standard rate the safer first-year choice for most.

Where Mileage Goes on Your Tax Return

Self-employed (1099, sole prop, single-member LLC): Schedule C, Part II, line 9 (“Car and truck expenses”). Enter the total dollar amount from your mileage calculation. The IRS may ask for the breakdown — business miles, total miles, the type of vehicle — on Schedule C Part IV.

S-corp or partnership owner: use an “accountable plan” arrangement where the entity reimburses you per mile (tax-free). The entity deducts the expense on its return; you don't report the reimbursement as income. Reimbursing yourself via the corporate card without an accountable plan creates messy tax problems.

W-2 employee: as of 2018, unreimbursed employee expenses are not federally deductible for most workers (eliminated by the Tax Cuts and Jobs Act). The remedy: ask your employer to reimburse you using their accountable plan at the IRS rate. Some states (California especially) still allow employee mileage deduction on the state return.

Statutory employees and some specialized workers (qualified performing artists, fee-basis state/local government officials, armed forces reservists) retain federal mileage deduction.

Common Mistakes

Counting commuting. The single most common audit issue. Personal commuting miles are never deductible, even if you check email at red lights.

Reconstructing the log. If your records are clearly created in bulk after the fact (round numbers, suspiciously consistent patterns), the IRS can disallow the whole deduction.

Mixing reimbursed and unreimbursed. If your employer reimbursed any portion of a trip, you can't double-dip by claiming the same miles on your own return.

Forgetting medical and charitable miles. They're lower-value than business miles, but if you're itemizing anyway, they add up over the year — especially if you have a chronic condition with regular treatment visits.

Switching methods without realizing the lock-in. If you used actual expenses in year 1, you generally can't switch to standard mileage in year 2 on the same vehicle. Make the choice deliberately in the first year.

Not tracking miles for short trips. A 3-mile drive feels too small to log. But across a year, hundreds of small trips add up to thousands of dollars — track them all or use an auto-tracking app.