Business Trip and Private Holiday: Organise the Costs
Build one dated itinerary showing the business activities and the private part of the trip, then attach each cost to the relevant event or travel leg. Keep shared transport and family costs visible instead of spreading everything by a simple day ratio. Review the purpose of the trip and the circumstances of each expense separately.
What you’ll get from this guide: Give your tax agent a clear travel file with supporting documents and unresolved allocations identified.
- Keep the original reason for the trip and the actual itinerary.
- Attach each expense to an activity, person or travel leg.
- Leave mixed transport questions open rather than inventing a day-based split.
A conference booking can be straightforward until a holiday is added, a partner joins or the itinerary changes. Keep the original booking and later changes together so your tax agent can follow the trip.
Preserve the reason the trip was booked
Keep the event invitation, customer meeting request, registration and the original itinerary. Record what business activity was planned and what actually happened. If a meeting was cancelled, keep the cancellation email rather than leaving the file looking as though it took place.
Record who travelled and who benefited from each booking. A shared hotel bill is easier to review when room occupants and any extra-person charges are visible.
Fictional five-night trip: a two-day trade event followed by a private stay. All amounts are amounts paid, with no GST calculation.
| Event or cost | Amount paid | Evidence | Review status |
|---|---|---|---|
| Return flight | $680 | Booking, route and reason trip was arranged | Mixed trip transport: review |
| Two event nights | $440 | Hotel folio and event program | Event context recorded |
| Three holiday nights | $660 | Separate hotel booking | Private stay recorded |
| Event registration | $330 | Registration invoice and attendance notes | Activity evidence attached |
| Partner travel | $510 | Separate traveller booking | Keep apart from owner expenses |
The listed payments total $2,620. That is a file control total, not a deductible total.
Link expenses to events, not just a folder called travel
Put accommodation against the actual nights. Link local transport to a destination and purpose. Keep meal receipts with the attendees and context rather than treating all restaurant spending alike. The owner meals guide provides a separate three-situation worksheet.
For airfares and other shared costs, keep the booking terms and the reason the route was chosen. Don't turn “two business days out of five” into a 40% airfare claim. The ATO's business travel guidance treats trip purpose, private activity and record requirements as relevant questions; a calendar fraction cannot answer all of them.
Record activity while you are travelling
Keep dates, places, times and descriptions of the work done. Save the program and your meeting notes, including changed plans. Check the ATO requirements for your entity and trip before departure so you do not discover missing diary evidence at tax time.
The worksheet below is an organisational aid, not a statement that you have met every travel-diary rule. If you kept no diary, tell your agent what dated evidence remains rather than recreating one as if it were written during the trip.
Mixed-purpose travel evidence register
Copy this blank template into your own files. Your records stay with you.
Hand over the unresolved items as a short list
List the return airfare, private extension, family costs, refunds and any unusual payment separately. Ask your agent to record the decision and reasoning against each item. Keep that decision with the invoices so next year's bookkeeper can understand the entry.
Use the lost receipt checklist for missing documents and the tax records hub to organise other mixed-use expenses.
Key takeaways
- Keep the original reason for the trip and the actual itinerary.
- Attach each expense to an activity, person or travel leg.
- Leave mixed transport questions open rather than inventing a day-based split.
Where to get help
A registered tax agent can assess the actual trip and income-tax treatment. Employee benefits, director travel and company fringe benefits need their own advice; this worksheet does not resolve them.
Where to go from here
Sole Trader Meal Records: Lunch, Travel and Client Meals
Record the context for meals during the trip.
3 min readLost a Business Receipt? Rebuild the Evidence File
Recover any missing travel documents before review.
3 min readBusiness Vehicle Records: Build a Logbook and Expense File
More help with “explain mixed use”.
2 min read
General information only. This guide doesn't take your personal or business circumstances into account and isn't financial, legal or tax advice. Rates and thresholds change — check the official sources linked in this guide and get qualified advice where your circumstances require it.