The rules on tax deductions for vacation homes are complicated. Do yourself a favor and keep good records about how and when you use your vacation home. If you’re the only one using your vacation home (you don’t rent it out for more than 14 days a year), you can deduct mortgage interest and real estate taxes on Schedule A. Rent your vacation home out for more than 14 days and use it yourself fewer than 15 days (or 10% of total rental days, whichever is greater), and it’s treated like a rental property. Those expenses get deducted using Schedule E. Rent your home for part of the year and use it yourself for more than 14 days and you have to keep track of income, expenses, and divide them proportionate to how often you used and how often you rented the house (Houselogic 12/9/11).