Understanding what counts as business mileage is the difference between claiming every dollar you deserve and leaving hundreds or even thousands on the table at tax time. The IRS draws a firm line between personal driving and business driving, and if you get it wrong, you risk losing deductions or drawing unwanted attention during an audit.
This guide walks through exactly which trips qualify, which do not, and the special rules that can turn otherwise non-deductible drives into legitimate write-offs.
What the IRS considers business mileage
The IRS defines business mileage as driving between two places of work for business purposes. The key word is “business.” If the trip serves an ordinary and necessary purpose related to your trade or profession, the miles you drive generally qualify for the standard mileage deduction of 72.5 cents per mile in 2026.
That sounds simple, but the details matter. A trip from your office to a client meeting is clearly business mileage. A trip from your couch to the same office is not. Everything in between depends on the specific circumstances of your work arrangement.
For a full breakdown of how business mileage affects your return, see our guide on business mileage for taxes.
Trips that qualify as business mileage
Here are the most common types of driving the IRS considers deductible business mileage:
Client and customer visits
Any drive from your workplace to meet a client, customer, or patient counts as business mileage. This includes traveling to their office, home, a restaurant, a job site, or any other location where you conduct business. The return trip to your office also qualifies.
Travel between work locations
If you work at multiple locations during the day, every trip between those locations is deductible. A contractor who drives from one job site to another, a consultant who visits two different client offices, or a sales rep covering their territory are all logging business miles.
Business errands
Trips to the bank, post office, office supply store, or any vendor for a legitimate business purpose qualify. Picking up materials for a project, dropping off a deposit, or mailing client invoices are all deductible drives.
Temporary work locations
The IRS treats any workplace where you expect to work for less than one year as temporary. Driving to a temporary work location from your home or regular office is deductible business mileage. This rule is particularly valuable for contractors, consultants, and anyone who takes on project-based work at different sites.
Conferences and professional development
Travel to industry conferences, trade shows, seminars, and continuing education courses qualifies when the event relates to your current business or profession.
Airport and travel hub trips
Driving to the airport or train station for a business trip counts as business mileage. So does the return drive home when the trip is over.
Trips that do NOT count as business mileage
Not every drive during the workday is deductible. These trips are personal in the eyes of the IRS, no matter how work-related they may feel:
Daily commuting
Your commute from home to your regular, permanent workplace is never deductible. It does not matter how far the drive is, whether you make work calls along the way, or whether you carry tools and equipment in your vehicle. The IRS treats the commute as a personal expense, period.
This is the single biggest area of confusion. For a detailed comparison, read our article on business miles vs commuting miles.
Personal errands during the workday
If you stop for groceries, pick up dry cleaning, or run any personal errand between business stops, that portion of driving is personal. You can only deduct the business portion of a mixed trip. If you take a ten-mile detour to grab lunch on the way to a client, those ten miles come out of your deduction.
Driving related to non-deductible activities
Miles driven for personal investment activities, hobbies, or volunteer work that does not qualify under the charitable mileage rules are not deductible as business mileage.
W-2 employee driving
Since the Tax Cuts and Jobs Act took effect in 2018, W-2 employees cannot deduct unreimbursed mileage on their personal tax returns. The One Big Beautiful Bill Act of 2025 made this permanent. Narrow exceptions exist for military reservists, certain state and local officials, and qualifying performing artists.
The home office exception: a powerful rule
One of the most valuable provisions in the IRS mileage rules is the home office exception. If you have a qualified home office that serves as your principal place of business, your home becomes your tax home. Every trip from your home office to a client, supplier, or business location is deductible business mileage.
Without a home office, driving from your house to your first appointment of the day is commuting. With a qualified home office, that same drive becomes a business trip.
To qualify, your home office must be used regularly and exclusively for business. A desk in the corner of your bedroom that you also use for personal tasks does not meet the standard. A dedicated room or separate structure used only for work does.
This exception can add thousands of deductible miles per year, especially for freelancers, consultants, and self-employed professionals who travel to client sites daily.
Real-world examples
A freelance photographer with a home office drives to a wedding venue for a shoot (25 miles), then to a coffee shop to meet a potential client (8 miles), then home (20 miles). All 53 miles are deductible because the home office is the principal place of business.
A self-employed plumber drives from home to the first job of the day (12 miles), then to a second job (9 miles), then to a supply house for parts (4 miles), then home (15 miles). The first 12 miles from home and the final 15 miles home are commuting (non-deductible) unless the plumber has a qualifying home office. The 13 miles between job sites and the supply house are deductible either way.
A consultant works from a home office three days a week and drives to the client site two days a week (30 miles each way). With a qualifying home office, all 120 weekly miles to and from the client site are deductible.
How to document what counts as business mileage
The IRS requires contemporaneous records, meaning you need to log your mileage at or near the time of each trip. Waiting until tax season to reconstruct a year of driving is a recipe for lost deductions and audit problems.
Each entry in your mileage log should include:
- Date of the trip
- Starting and ending locations
- Business purpose (e.g., “client meeting with Smith Co.”)
- Miles driven
A mileage tracking app takes care of this automatically. Tripbook records the date, route, distance, and lets you tag the business purpose for every trip. No spreadsheets, no guesswork, and no scrambling at year-end.
For the full list of what the IRS expects in your records, see our guide on IRS mileage log requirements.
Common mistakes to avoid
Deducting your commute. Even if it feels like a business trip because you answer emails on the drive, the IRS will not agree.
Forgetting to split mixed trips. If a trip combines business and personal stops, you must calculate and deduct only the business portion.
Claiming miles without a log. The IRS can disallow your entire mileage deduction if you cannot produce adequate records. An estimate is not sufficient.
Double-dipping. If your employer reimburses you for mileage, you cannot also deduct those same miles on your tax return.
Ignoring the home office advantage. Many self-employed professionals miss thousands of deductible miles because they do not realize their home office qualifies them to deduct drives that would otherwise be commuting.
Start tracking what counts as business mileage today
Every qualifying business mile is worth 72.5 cents on your tax return in 2026. Whether you drive to client meetings, run business errands, or travel between job sites, those miles add up fast. The key is knowing which trips count and making sure you have the records to prove it.
The easiest way to never miss a deductible mile is to track automatically from the start.
Download Tripbook and let every business mile count toward your next tax deduction.
