Your morning drive to work will never save you a dime on your taxes. Not if it runs 60 miles each way. Not if you leave the house at 4 a.m. Not if you spend the entire trip on client calls with the dashboard glowing. The IRS treats travel between your home and your regular workplace as a personal commute, full stop, and personal commuting is never deductible.
But change one fact about your situation — a qualifying home office, a temporary assignment across town, a second stop after the first — and those exact same miles flip from worthless to deductible at 76 cents apiece. This guide maps the line between the two, so you stop leaving money on the road and stop claiming miles that would not survive an audit.
The Core Rule: Your Commute Is Never Deductible
The rule lives in IRS Publication 463 and decades of case law, and it is blunt: transportation between your home and a regular work location is a nondeductible commuting expense. That covers the drive in and the drive home, every workday, whether you are an employee, a freelancer, or a business owner.
What surprises most people is how few exceptions the distance and hardship arguments get. None of the following converts a commute into business mileage:
- A long drive. A 90-minute each-way commute is still a commute.
- Odd hours. Leaving before dawn or working nights changes nothing.
- Hauling work gear. Carrying tools, samples, or a laptop in the trunk does not make the trip business travel.
- Working while driving. Taking business calls hands-free on the way in does not convert the miles, and you should not be doing the kind of work that would anyway.
- A home office that does not qualify. Having a desk and a laptop at home is not enough, as the next sections explain.
The logic is that where you choose to live in relation to your work is a personal decision, and the cost of bridging the gap is personal too. Once you accept that, every other rule in this guide is about defining which trips are not that bridge.
What Counts as Deductible Business Mileage
Any driving you do after you arrive at work generally counts, provided it is for business. The classic deductible trips:
- Between work locations in the same day. Office to client site, job site to job site, shop to supplier and back. If you start at one work location and drive to another for business, those miles are deductible.
- Business errands from your workplace. Driving from the office to the bank, the post office, or the supply store on company business, then back.
- From one job to a second job. If you work two jobs in one day, the drive directly between them is deductible business travel.
The second-job rule has a twist worth memorizing. If you go from your first job straight to a second job, those miles count. But if you work only the second job on a given day — say your Saturday shift at a side job — the drive from home is an ordinary commute and is not deductible. The IRS cares about the trip you actually took that day, not your employment status in general.
For self-employed workers, deductible miles go on Schedule C and reduce both income tax and self-employment tax, which makes each mile more valuable to you than it would be as a plain income-tax deduction. W-2 employees, meanwhile, generally cannot deduct unreimbursed mileage on a federal return at all — your move is to get reimbursed by your employer through an accountable plan, which keeps the reimbursement tax-free instead of chasing a deduction that does not exist.
The Home Office Exception That Changes Everything
Here is the single most valuable exception for freelancers, contractors, and home-based business owners. If your home qualifies as your principal place of business, your daily transportation picture flips: trips from home to clients, job sites, and suppliers become deductible business mileage rather than commuting.
Qualifying matters more than labeling. A principal place of business under the home-office rules means a portion of your home used exclusively and regularly for business — a real office, used only for work, on a continuing basis. The kitchen table you clear off for dinner does not count. Neither does a guest room with a laptop in the corner.
The difference this makes is easiest to see side by side:
- No qualifying home office, no outside office. You drive from home to a client and back. Under the IRS first-and-last-stop rule, that round trip is a nondeductible commute, even though you have no other office.
- Qualifying home office. The same round trip to the same client is deductible business mileage, because you are traveling from one work location (your home office) to another.
Note the trap in the middle: an office inside your home that does not qualify as a principal place of business gives you nothing for mileage purposes. Worse, if you also have a regular office downtown, the drive between home and that office remains a commute even with a qualifying home office in the mix — though trips from home to clients and temporary sites still count. Qualification is the whole game, so document your exclusive-and-regular use the same way you document your miles.
Temporary Work Locations and the One-Year Test
The second big exception covers temporary work locations — assignments you realistically expect to last one year or less. Revenue Ruling 99-7, the IRS guidance that examiners still apply, sorts home-to-temporary-site travel into three buckets:
- You have no regular workplace. Think of a traveling tradesperson who works only at customer sites. Your trips from home to temporary sites within your metropolitan area are commuting and not deductible. Only temporary sites outside your metro area produce deductible miles. Your metro area generally means your city plus the suburbs considered part of it.
- You have a regular workplace somewhere else. Now the rule gets generous: trips from home to a temporary work location in the same business are deductible whether the site is inside or outside your metro area. The regular office anchors you, and the temporary site is treated as business travel away from it.
- Your home is your principal place of business. As in the previous section, trips from home to temporary sites are deductible business miles.
The one-year expectation is the tripwire. If a project is realistically expected to last more than a year when you start — or blows past a year in practice — the location stops being temporary and becomes regular, and the miles revert to commuting. Contractors on open-ended engagements should calendar this: the month an assignment crosses from temporary to indefinite is the month the deduction dies, and the IRS will ask when you knew.
A quick example ties the buckets together. A self-employed electrician with a qualifying home office drives to a six-month commercial project across town. Deductible, under bucket 3. The same electrician with no home office and no shop drives to the same site. Not deductible, under bucket 1 — it is inside the metro area. Add a small rented shop the electrician reports to regularly, and the same drive becomes deductible under bucket 2. Same road, same truck, three different answers.
Five Commuting Traps That Cost Real Money
Even people who know the rules above lose deductions — or claim bad ones — through these recurring mistakes.
1. The coffee-stop theory of tax law
Stopping to drop off a proposal or check a job site in the middle of your commute does not convert the commute into business travel. The IRS looks at the primary character of the trip: home to regular workplace is commuting even with a business errand grafted onto it. Plan the errand as a separate round trip from the office and it counts; bolt it onto the commute and it does not.
2. Counting the first and last legs
Without a qualifying home office or a regular workplace elsewhere, the day's first trip out and last trip home are commuting — the first-and-last-stop rule from the home-office section. Only the middle legs, between business stops, count. Mobile workers without a home office routinely overclaim here by logging every mile from the moment they leave the driveway.
3. Forgetting the assignment crossed one year
Temporary status is about realistic expectations, and expectations update. A nine-month project extended to fourteen months stops being temporary when the extension becomes realistic, not at the twelve-month mark retroactively — but from that point forward the miles are commuting. Put a review date on every long engagement.
4. Logging miles with no business purpose
A mileage total without destinations and reasons is a number, not a deduction. The log must tie each trip to a business purpose, which is where most year-end reconstructions collapse. More on the log below.
5. Employees deducting what employers should reimburse
If you are a W-2 employee driving your own car for work, the deduction is not your tool — the accountable plan is. Ask your employer to reimburse business miles at or below the IRS standard rate with proper substantiation. Done right, the reimbursement is tax-free to you and deductible to the company. Done informally, with flat monthly car allowances and no mileage records, it is just taxable wages.
What Your Miles Are Worth in 2026
The IRS prices business miles with the optional standard mileage rate, and 2026 is a split year. Miles driven January through June count at 72.5 cents each, and the IRS raised the rate mid-year to 76 cents for miles driven July through December, citing higher fuel prices. Track which half of the year each trip falls in and apply the matching rate — averaging the two is not how the rule works.
Say you drive 8,000 qualifying business miles between July and December. At the second-half rate, that is a $6,080 deduction straight off your Schedule C income. Drive the same 8,000 miles as commuting and the deduction is zero. That gap is why getting the classification right matters more than squeezing out a few extra trips.
Two fine points round out the math. First, the standard rate already bundles gas, maintenance, insurance, and depreciation, so you cannot add those on top — but parking fees and tolls for business trips are separately deductible on top of the mileage rate. Second, the standard rate is optional: you can deduct actual vehicle expenses instead, allocated by business-use percentage, which sometimes wins for expensive-to-run vehicles. If you want to keep the choice open on a car you own, use the standard rate in the first year you place the car in service; starting with actual expenses locks you out of switching to standard later.
No Log, No Deduction: The Mileage Record Rule
Every mile in this guide shares one requirement: a contemporaneous mileage log. Vehicle expenses face the strictest substantiation rule in the tax code — without adequate records, the deduction is zero, no matter how real the driving was. A credible log records four things for each business trip: the date, the destination, the business purpose, and the miles driven. Odometer readings at the start and end of the year tie the business miles to total miles and establish your business-use percentage.
Contemporaneous means recorded at or near the time of the trip, not reconstructed the following April from a calendar and optimism. IRS examiners are openly skeptical of logs created long after the fact, and courts have thrown out entire vehicle deductions over logs that were obviously backfilled. This is one of the highest-return habits in small-business recordkeeping: a GPS mileage app that captures trips automatically, plus thirty seconds per trip to tag the business purpose, beats any spreadsheet you promise yourself you will fill in later.
Treat the log as part of your books, not a tax-season side quest. Reconcile it monthly the way you reconcile a bank account: total miles against the odometer, business purpose on every line, personal and commuting miles visibly excluded rather than silently omitted. When the log lives alongside your expense records, your Schedule C vehicle line stops being a guess and starts being a number you can defend.
Keep Your Mileage and Your Books in One Place
Getting commuting-versus-business classification right is really a bookkeeping discipline: consistent categories, timely records, and numbers that tie to each other. A mileage log you update monthly, expense accounts that separate travel from commuting, and a year-end total you can trace back to individual trips are the same habits that keep the rest of your finances clean.
As you tighten up your travel records, maintaining clear financial records everywhere else matters just as much. Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — no black boxes, no vendor lock-in. Get started for free and see why developers and finance professionals are switching to plain-text accounting.
