Travel Expenses — When Is Business Travel Tax-Deductible?

Genuine business travel — flights, accommodation, and reasonable meals while away — is generally deductible when its dominant purpose is business. The moment a trip becomes a genuine mix of business and a holiday, only the business-related portion is claimable, and the private portion needs to be identified and excluded, not quietly absorbed into the claim.

• Airfares, train or other transport to and from the business destination.

• Accommodation for the nights genuinely required for business purposes.

• Reasonable meals while travelling overnight for business — unlike the entertainment rules covered separately, ordinary meals while away on business travel aren't generally treated as entertainment.

• Incidental costs directly connected to the business purpose — conference fees, parking, tolls, local transport to meetings.

If a trip is entirely business, the full cost is generally deductible. If a trip is entirely private, none of it is. Most of the genuine complexity sits in between — a business trip extended by a few extra days for a holiday, or a family member brought along.

• Extending a business trip privately. The transport cost to get there and back generally remains deductible if the primary purpose was business, but accommodation and other costs for the extra private days need to be excluded from the claim.

• Bringing a partner or family member. Their portion of travel and accommodation costs generally isn't deductible, unless they have a genuine, separate business role in the trip.

• A trip genuinely mixed in purpose. Costs need to be apportioned on a reasonable basis between the business and private components — not claimed in full simply because some business activity occurred.

The key question the ATO asks isn't “was there any business activity on this trip” — it's “what was the trip genuinely for.” A five-day trip with one afternoon meeting and four days of sightseeing has a very different dominant purpose than a two-day trip built entirely around a client visit, even if both technically involved “some business.”

A business owner flies interstate for a three-day supplier conference, then stays an extra two days for a personal holiday before flying home. The return airfare is generally still deductible, since the trip's primary purpose was the conference. Accommodation and meals for the conference days are deductible; accommodation, meals and any additional costs for the two extra private days are not.

• A clear note of the business purpose for the trip — what it was for, and why it was necessary.

• Tax invoices for flights, accommodation and other costs, ideally itemised by date.

• If the trip includes a private component, a clear record of which dates and costs relate to each.

• For longer or more complex trips, a simple diary noting what business activity occurred on which days.

• Could I clearly explain the dominant business purpose of this trip if asked?

• If any part of the trip was private, have I genuinely separated those costs out?

• Do I have proper records connecting the trip to a specific business purpose, not just receipts?

• Am I treating a partner's or family member's travel costs correctly, rather than claiming them by default?

• you're planning a trip that genuinely mixes business and personal time and want the apportionment done correctly;

• you regularly travel for business and want a consistent, defensible record-keeping approach set up;

• you're not sure whether a specific past trip was claimed correctly; or

• your business involves frequent interstate or international travel and you want the rules explained properly for your situation.

→ Meals, Coffee, Entertainment and Client Functions — What Can My Business Actually Claim?

→ What Business Expenses Can I Claim as a Tax Deduction?

→ What Accounting Records Do I Need to Keep — and for How Long?

SKC Accounting | Knowledge Centre | Knowledge Guide 058

Last reviewed: August 2026

General information only. This guide does not take into account your individual circumstances and is not a substitute for professional accounting, taxation, legal or financial advice.