Can I deduct a conference or trade show trip?

Yes — attending a conference, industry trade show, or professional meeting directly related to your business qualifies as business travel. Registration fees, travel, hotel, and 50% of meals are deductible. If you extend the trip for personal time, the extra personal days' hotel costs aren't deductible, but the round-trip transportation remains fully deductible as long as the primary purpose was the conference.

Can I bring my spouse and deduct their travel costs?

Only if your spouse is also a bona fide employee of the business who has a genuine business reason to attend. If your spouse is traveling for personal reasons — even if it's nice for company — their travel costs are not deductible. You can still deduct your own travel at the same rate you would have paid traveling alone (e.g., one hotel room rate, your share of transportation).

What about the trip to a warm location that happens to involve some client meetings?

The IRS scrutinizes trips that look like personal vacations with incidental business activity. If the primary purpose is personal and the business activity is secondary, the trip doesn't qualify. If you have documented, substantive business meetings on most days, and the location happens to be appealing, that's different. The key: 'primary purpose' is determined by time spent on business vs personal activity, not by the destination.

Do I need to keep all my receipts for a business trip?

Yes, with a practical exception: under IRS rules, receipts are required for individual expenses of $75 or more. For expenses under $75 (like taxi fares, parking meters), a record of the amount and business purpose is sufficient. In practice, photograph every receipt and log the business purpose while traveling — reconstruction months later is unreliable.

What's the per diem alternative to tracking actual meal expenses?

The IRS allows use of per diem rates to deduct meals and incidental expenses without tracking individual receipts. The standard CONUS (continental U.S.) rate is $68/day for meals and incidentals; major cities have higher rates. You can use the per diem for meals instead of tracking actuals, but you still apply the 50% deductibility limit to the per diem amount. Lodging per diem rates exist but are more complex to use for self-employed owners.

Tax deductions

Business Travel Deduction: What Qualifies, What Doesn't, and How to Document It

Business travel is deductible when the primary purpose is business — but the rules differ for domestic vs international trips, mixing business with personal travel, and whether you can bring a spouse. Here's how to get it right.

Written by Matt Reese, CPA · 6 min read · Published April 2026·Share on LinkedIn

Key Takeaways

A trip is deductible when the primary purpose is business — 'primary' means more business days than personal days for domestic travel.
Transportation costs (flights, train, rental car) are fully deductible on a primarily-business trip, even if you stay an extra day or two personally.
Hotel and meals while traveling for business are deductible — hotels at 100%, meals at 50%.
International travel has a stricter test: if the trip is part personal, you must allocate transportation costs by business vs personal days. Domestic trips get the full transportation deduction if business days exceed personal.

The primary purpose test

A trip is deductible as business travel when its primary purpose is business. For domestic trips, this means more days are spent on business activity than personal activity. For international trips, the standard is stricter — you must allocate if the trip is mixed.

“Away from home” is also required — the IRS defines this as travel that requires sleep or rest to continue your duties. A day trip to a client site 40 miles away generally doesn’t qualify; an overnight trip almost always does.

Primary purpose determines deductibility. Once established, adding a personal day doesn’t disqualify the trip — it just limits specific personal day costs.

What’s deductible on a business trip

Expense	Deductible?	Amount
Round-trip airfare or transportation	Yes — if primarily business	100% on primarily-business domestic trip; allocated for international
Hotel / lodging	Business days only	100% of cost for business nights; personal nights not deductible
Meals while traveling	Yes	50% — same 50% rule as regular business meals
Rental car	Yes — for business days	100% during business portion
Baggage fees, tips, dry cleaning on long trip	Yes	100% — incidentals directly connected to travel
Conference registration fee	Yes	100%
Wi-Fi and business calls on the road	Yes	100%
Personal side trips / sightseeing	No	Personal activity, not deductible
Spouse travel (if not a bona fide employee)	No	Personal expense
Lavish lodging beyond ordinary and necessary	Partial	IRS 'ordinary and necessary' test — 5-star hotel at a conference is defensible; remote resort is not

Domestic travel: the simpler rule

For a trip within the United States, if the primary purpose is business (more business days than personal), you deduct:

Full round-trip transportation — the flight, train, or drive cost is 100% deductible even if you stay an extra two days for personal reasons
Hotel for business nights — the personal nights’ hotel is not deductible
Meals at 50% — for the full trip, or at minimum for business days

Five-day San Francisco trip: 3 business days + 2 personal days

Round-trip airfare ($450)100% deductible = $450

Hotel — 5 nights at $200/night ($1,000 total)3 business nights = $600 deductible

Meals — 5 days at $80/day average ($400 total)50% × $400 = $200 deductible

Conference registration ($500)100% deductible = $500

Rental car (5 days × $70 = $350)3 business days × $70 = $210 deductible

Total trip cost$2,300

Total deductible$1,960

Non-deductible (personal days hotel + personal share)$340

On a primarily-business domestic trip, the personal days cost very little in lost deductions. The full airfare is deductible regardless. Only the extra hotel nights and a share of meals are excluded.

International travel: the allocation rule

International trips are subject to a stricter proportional allocation rule when there are both business and personal days:

If 75%+ of days are business: Full transportation is deductible (same as domestic rule)
If 25–74% of days are business: Transportation must be allocated — deduct only the business-day percentage of round-trip transportation cost
If the trip is primarily personal: No transportation deduction; business-day hotel and meals may still be partially deductible

The 'seven-day rule' for international travel

If the international trip is 7 days or fewer (not counting the departure day) and you spend fewer than 25% of days on personal activities, the full trip qualifies regardless of allocation. This is why many business owners time international trips strategically — a 6-day trip with 2 personal days (67% business) gets full transportation deductibility.

What counts as a “business day”

Counting days correctly matters. The IRS considers a day a business day if:

You spend the majority of the normal business hours on business activities
It’s a travel day getting to a business destination (departure and arrival days)
It’s a standby day where you must remain available for business even if no meetings occur
It’s a Saturday, Sunday, or holiday that falls between business days (you can’t practically fly home and back)

Weekends between business appointments generally count as business days for allocation purposes. A Saturday between a Friday conference and a Monday client visit is a business day even if you sightsee.

Documentation requirements

Travel deductions require the same substantiation as other business expenses — but the IRS expects more detail for travel given the history of abuse. For each trip, document:

Business purpose: What business was conducted (conference, client meetings, site visits, etc.)
Itinerary: Dates, locations, who you met with and what was discussed
Receipts: Transportation, hotel, and individual meal expenses over $75
Business vs personal days: A log identifying which days were business and which were personal

An email trail confirming the business meetings, the conference program if applicable, and a brief trip summary kept contemporaneously are the strongest documentation. Creating these records months later is much weaker.

Keep a trip summary email

After each significant business trip, send yourself a brief summary email: where you went, who you met, what was discussed, and which days were business vs personal. It takes 5 minutes and creates a contemporaneous record that is far more defensible than a reconstructed calendar. Store it in a folder with the receipts.

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Frequently asked

Questions owners actually ask

Can I deduct a conference or trade show trip?: Yes — attending a conference, industry trade show, or professional meeting directly related to your business qualifies as business travel. Registration fees, travel, hotel, and 50% of meals are deductible. If you extend the trip for personal time, the extra personal days' hotel costs aren't deductible, but the round-trip transportation remains fully deductible as long as the primary purpose was the conference.
Can I bring my spouse and deduct their travel costs?: Only if your spouse is also a bona fide employee of the business who has a genuine business reason to attend. If your spouse is traveling for personal reasons — even if it's nice for company — their travel costs are not deductible. You can still deduct your own travel at the same rate you would have paid traveling alone (e.g., one hotel room rate, your share of transportation).
What about the trip to a warm location that happens to involve some client meetings?: The IRS scrutinizes trips that look like personal vacations with incidental business activity. If the primary purpose is personal and the business activity is secondary, the trip doesn't qualify. If you have documented, substantive business meetings on most days, and the location happens to be appealing, that's different. The key: 'primary purpose' is determined by time spent on business vs personal activity, not by the destination.
Do I need to keep all my receipts for a business trip?: Yes, with a practical exception: under IRS rules, receipts are required for individual expenses of $75 or more. For expenses under $75 (like taxi fares, parking meters), a record of the amount and business purpose is sufficient. In practice, photograph every receipt and log the business purpose while traveling — reconstruction months later is unreliable.
What's the per diem alternative to tracking actual meal expenses?: The IRS allows use of per diem rates to deduct meals and incidental expenses without tracking individual receipts. The standard CONUS (continental U.S.) rate is $68/day for meals and incidentals; major cities have higher rates. You can use the per diem for meals instead of tracking actuals, but you still apply the 50% deductibility limit to the per diem amount. Lodging per diem rates exist but are more complex to use for self-employed owners.

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Educational content only.This article is for informational purposes and does not constitute tax, legal, or investment advice. Every owner’s facts are different; consult a qualified CPA and advisor before acting. Tax and accounting services are provided through Matt Reese, CPA; investment advisory services are provided through Measured Risk Portfolios, a registered investment adviser. Matt Reese, CPA and Measured Risk Portfolios are separate entities; clients are not required to engage both.