Mortgage Interest Deduction

One of the neatest deductions itemizing homeowners can take advantage of is the mortgage interest deduction, which you claim on Schedule A. To get the mortgage interest deduction, your mortgage must be secured by your home — and your home can be a house, trailer, or boat, as long as you can sleep in it, cook in it, and it has a toilet.

Interest you pay on a mortgage of up to $1 million — or $500,000 if you’re married filing separately — is deductible when you use the loan to buy, build, or improve your home.

If you take on another mortgage (including a second mortgage, home equity loan, or home equity line of credit) to improve your home or to buy or build a second home, that counts towards the $1 million limit.

If you use loans secured by your home for other things — like sending your kid to college — you can still deduct the interest on loans up $100,000 ($50,000 for married filing separately) because your home secures the loan.

PMI and FHA Mortgage Insurance Premiums

You can deduct the cost of private mortgage insurance (PMI) as mortgage interest on Schedule A if you itemize your return. The change only applies to loans taken out in 2007 or later.