Q: My current PPOR was purchased in 2007 for $300,000, with a loan value of $200,000. I’m now building a new home that costs $600,000. I’ll use my first home as an investment property, and move into the new house soon. In the meantime, a valuation on my first home came back at $450,000 and my borrowing limit is $360,000. With this in mind, how can I best claim tax on interest payments and what precautions can I take?