Apportioning Travel Expenses - Part Private part business

[phoenix]

How should my friend go about apportioning travel expenses for his trip overseas earlier this year?
He is a DJ (sole-trader business rather than being employed) - usually working in Australia every Friday and Saturday night. Just before the end of the 09 FY he took a trip overseas. While he was there (for 4 weeks), he played gigs 4 nights per week. Aside from this and networking, the trip was also a bit of a holiday. The clubs didn't want invoices and all paid in cash which he used for trip and spending money - I'm not sure exactly on rates. How should he go about figuring out how much of his flights (for example) can be claimed?

[chrischris626]

Overseas travel has many issues especially if he earned some income there. The question about overseas travel expenses better to ask his tax accountant who is going to do his tax return, they will ask all questions about it and they will make a decision how much to claim for the overseas travel . To be able to claim airfares and other expenses as a tax deduction the purpose of the trip should be business related and what was the outcome of such trip, written evidences of expenses should be kept. If the travel is for both private and business purposes, private expenses must be excluded.