Say you are going on an overseas work trip to country "C" for 2 weeks to attend a conference in the field related to your work. This trip is primarily a business trip. You decide to tag along 1 week in country "A" for leisure and 1 week in "B" for leisure before flying to country "C" for your business trip. The flight costs are as follows:
Sydney -> country "A" = $1000
Country "A" -> Country "B" = $300
Country "B" -> Country "C" = $400
Country "C" -> Sydney = $1000
How do you apportion the flight cost to your work trip at country "C" for tax deduction purposes?
To me it seems travel to other countries isn’t incidental to your primary trip given the 50/50 split.
Country B to C and C to home is your answer based on the question