Business travel is broadly deductible, but only when a trip actually qualifies as business travel — and the definition is narrower than everyday usage. Getting the category right starts with getting the trip right.

When a trip counts as business travel

You're "traveling" for tax purposes when business requires you to be away from your tax home — generally the city or area of your main place of business, not where your family lives — long enough to need sleep or rest. A day trip two towns over isn't travel; the drive is a transportation cost, but there's no lodging or per diem to speak of.

The trip also needs a genuine business purpose that existed before you booked it: a client engagement, a conference, a trade show, scouting a supplier. "I answered some emails from the beach" does not convert a vacation.

What you can deduct

Once a trip qualifies, the deductible costs include:

  • Transportation to and from the destination — airfare, train tickets, or mileage if you drive
  • Local transportation at the destination: taxis, rideshares, rental cars, transit
  • Lodging — hotels, motels, short-term rentals — for the business days of the trip
  • Baggage fees, tips, laundry and dry cleaning on longer trips, and other incidentals
  • Business communication costs: hotel wifi, international phone plans for the trip

Meals while traveling are deductible too, but at 50% rather than 100%, which is why they belong in your meals category rather than travel. Keeping them separate saves your accountant from picking through hotel folios later.

Per diem: the simpler path for meals and incidentals

Instead of tracking every receipt, sole proprietors and employees can use the federal per diem rates for meals and incidental expenses — a flat daily allowance that varies by city (the GSA publishes rates for the continental US). If you use per diem for meals, you don't need meal receipts, just proof of the time, place, and business purpose of the trip.

Two caveats. First, self-employed people can use per diem only for meals and incidentals — lodging must be actual cost with receipts. Second, the 50% limit still applies to the meals portion. Per diem trades receipt-tracking for a standardized amount; it doesn't increase the deduction.

Mixed business and personal trips

Real trips are rarely pure. The general rules for domestic travel:

  1. If the trip is primarily business (measured mostly by how you spend your days), the full round-trip transportation is deductible, plus lodging and meals for the business days only.
  2. If the trip is primarily personal, none of the transportation is deductible — even if you take a real meeting while there. Only the direct costs of the business activity (say, a taxi to the client and back) qualify.
  3. Extra costs for a spouse, partner, or kids are personal. Deduct the single-occupancy reality: your hotel room may cost the same either way, but their plane tickets never qualify unless they're employees with a genuine business role.

A useful habit: when you book a mixed trip, note the business-day count right away ("5 nights, 3 business days — conference Tue–Thu"). Splitting costs at categorization time is easy; reconstructing intent at tax time is not.

Records to keep

For each trip, keep the receipts for transportation and lodging (required for lodging regardless of amount, and for anything else $75 or over), plus a record of dates, destination, and business purpose. A calendar entry and the conference agenda are usually plenty. Credit card statements alone are weak evidence — they show the amount but not the purpose.

Common miscategorizations

  • Commuting to your regular workplace is never travel, no matter the distance.
  • A hotel in your home city for convenience (late event, early flight) is generally personal.
  • Conference registration fees aren't travel — they're a professional development or dues-type expense; keep them out of 5600 so your travel numbers stay meaningful.

Travel invites scrutiny because it blends so easily with leisure. Book with a documented purpose, split the personal parts honestly, and the category takes care of itself.