Can a 1099 Employee Write Off Mileage? Methods, Logs, and Limits

Yes. If you’re paid as an independent contractor and receive a 1099-NEC, you can write off the miles you drive for business on Schedule C, and for many contractors it’s the single largest deduction on the return. For the 2026 tax year, the IRS standard mileage rate is 72.5 cents per mile, so 20,000 business miles knocks $14,500 off taxable income.¹ That same deduction lowers both your income tax and your self-employment tax.

The rule exists because the IRS treats a 1099 contractor as a self-employed business owner. Business driving is an ordinary and necessary expense under Internal Revenue Code Section 162, the same provision that lets any business deduct its operating costs.² Nothing is withheld from your 1099 pay for income tax, Social Security, or Medicare, so the deductions you claim at filing are what bring your bill down to a fair number.³

The Two Methods: Standard Rate or Actual Expenses

The IRS lets you choose one of two ways to calculate the deduction each year.

The standard mileage rate is the simpler option. Multiply your business miles by the IRS rate (72.5 cents for 2026), add any business-related parking fees and tolls, and you’re done. The rate already includes gas, insurance, depreciation, maintenance, and wear, so you aren’t tracking those receipts.¹ One catch: if you own the vehicle, you have to pick the standard rate in the first year you use it for business to preserve the option to switch methods later. If you lease, once you choose the standard rate you’re locked in for the entire lease, including renewals.⁴

The actual expense method means tracking every vehicle cost for the year and deducting the business-use percentage. If 15,000 of your 20,000 total miles were for business, your business-use percentage is 75%, and you deduct 75% of what the car actually cost you to own and operate.⁴ Deductible costs include gas, oil, tires, repairs, insurance, registration, license fees, the business portion of car loan interest, depreciation subject to IRS caps, and lease payments.⁵

Actual expenses often produce a bigger deduction for newer or more expensive vehicles, or for vehicles with heavy repair bills. The trade-off is the paperwork: you need a receipt for everything you claim. Parking and tolls tied to business trips are deductible on top of your mileage either way; parking at a regular workplace is not, because that’s a commuting cost.⁶

What Actually Counts as a Business Mile

Not every mile with a work purpose is deductible. The rule that catches the most people: your daily commute doesn’t count. Driving from home to a regular place of business and back is personal.⁶

A qualifying home office changes that. If your home office is your principal place of business, every drive from that home office to a client, a job site, or a business meeting is deductible from the first mile.⁶ For a lot of 1099 contractors, that single fact is where thousands of miles per year become deductible instead of getting written off as commuting.

Trips that clearly qualify:

Driving between two work locations in the same day
Picking up supplies, meeting a client, or visiting a vendor
Travel to a temporary work site rather than a regular one
Runs to the bank, post office, or any errand with a direct business purpose

Personal side-trips inside a business trip don’t kill the business portion, but the personal miles themselves don’t count.

The Log the IRS Expects You to Keep

The IRS requires “adequate records” kept at or near the time of each trip. A log you throw together in April from memory is the kind of documentation that collapses under an audit. For each business trip, you need four things:

The mileage for the trip, and total miles for the year
The date
The destination
The business purpose

Those requirements come from the substantiation rules in Publication 463.⁶ The burden of proof sits with you. If the IRS questions a 25,000-mile claim and you can’t produce a contemporaneous log with dates, destinations, and purposes, the deduction can be disallowed in full.

Smartphone mileage apps meet the requirements as long as the digital records carry transaction-level detail and tie back to your return. The IRS has accepted machine-sensible records since Revenue Procedure 98-25.⁷ GPS-based apps that auto-capture start and end points, mileage, and timestamps are the least painful way to keep a log that will hold up. You still have to tag each trip with a business purpose; no app can figure that out for you.

Where the Deduction Goes on Your Return

Mileage is reported on Schedule C (Form 1040) along with the rest of your self-employment income and expenses.⁸ The relevant lines:

Line 1: Gross income, typically your 1099-NEC totals
Line 9: Car and truck expenses. Under the standard rate, this is business miles × $0.725 plus parking and tolls
Line 13: Depreciation, if you’re using the actual expense method and claiming it (Form 4562 attaches here)
Line 31: Net profit or loss, which flows to Schedule 1

Schedule C also asks you to state which method you used, when the vehicle was placed in service, and your business versus personal miles for the year.⁸

Why the Deduction Is Worth More Than the Income Tax Savings

Every dollar of mileage deduction reduces net profit, and net profit is what feeds two separate taxes.

The first is income tax at your ordinary rate. The second is self-employment tax, which is the 1099 contractor’s version of the Social Security and Medicare taxes a W-2 employee splits with an employer. The rate is 15.3%: 12.4% for Social Security on the first $184,500 of net self-employment earnings in 2026, and 2.9% for Medicare with no cap.⁹¹⁰ An additional 0.9% Medicare surtax applies on earnings above $200,000 for single filers.

A $10,000 mileage deduction saves roughly $1,530 in self-employment tax before you count the income tax savings on top. You also get to deduct the employer-equivalent half of your self-employment tax when calculating adjusted gross income, which shaves a little more off income tax.⁹

The deduction also affects your quarterly estimated tax payments. Because no one withholds from 1099 income, you generally have to make estimated payments if you expect to owe $1,000 or more at filing, with due dates of April 15, June 15, September 15, and January 15 of the following year. Building your expected mileage deduction into those estimates keeps you from overpaying all year. To avoid the underpayment penalty, pay at least 90% of the current year’s tax or 100% of the prior year’s, whichever is smaller.¹¹

What Happens if You Overstate the Number

The IRS sees inflated mileage claims constantly, and the penalty math reflects that. Negligence or a substantial understatement of income tied to overstated deductions carries a 20% accuracy-related penalty on the underpaid tax, doubling to 40% for gross valuation misstatements.¹² If the IRS decides the claim was fraudulent, such as personal miles logged as business, the penalty is 75% of the underpayment attributable to fraud.¹³ Interest runs from the original due date of the return.

The protection is simple. Keep a log as you drive, not in April. Don’t count personal miles. Don’t estimate when the app on your phone can track. The deduction is generous when you use it honestly, and it’s the kind of number the IRS knows how to test.

1
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile
2
Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses
3
Internal Revenue Service. About Form 1099-NEC, Nonemployee Compensation
4
Internal Revenue Service. Topic No. 510, Business Use of Car
5
Internal Revenue Service. Instructions for Schedule C (Form 1040)
6
Internal Revenue Service. Publication 463, Travel, Gift, and Car Expenses
7
Internal Revenue Service. Revenue Procedure 98-25
8
Internal Revenue Service. 2025 Instructions for Schedule C (Form 1040)
9
Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
10
Social Security Administration. What Is the Current Maximum Amount of Taxable Earnings for Social Security
11
Internal Revenue Service. Estimated Taxes
12
Office of the Law Revision Counsel. 26 US Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments
13
Office of the Law Revision Counsel. 26 US Code 6663 – Imposition of Fraud Penalty