We purchased our first rental property in 2010. We funded it with 2 sources. The first was with a commercial loan. The second was refinancing our primary home and taking the equity to fund the remaining amount of the rental purchase price. My question is: can I deduct a portion of the applicable fees for my primary home refinance loan? My thinking is I can use a portion of the fees relative to the ratio of the rental money use vs. primary home use. For example, if the title insurance was $1000, we used $50k for the rental and $100k for the home, I could deduct $333. Any help would be greatly appreciated!