Gaming the Mortgage Interest Deduction Under the New Tax Law
The rise in the standard deduction means far fewer people will be deducting mortgage interest.


Note: The editors of Kiplinger's Personal Finance magazine and the Kiplinger Tax Letter are answering questions about the new tax law from subscribers to our free Kiplinger Today daily email. See other reader Q&As about the new tax law, or submit your own question.
Question: My wife and I owe about $250,000 on our home mortgage, the interest on which we have always deducted along with our other itemized deductions. Now that Congress has doubled the standard deduction, though, we’ll stop itemizing and lose the benefit of the mortgage interest deduction.
We also own an apartment building free-and-clear and are thinking of borrowing $250,000 against it, and using the money to retire the home mortgage. Then, we could deduct the interest on the apartment loan to offset our rental income. Will that work?

Sign up for Kiplinger’s Free E-Newsletters
Profit and prosper with the best of expert advice on investing, taxes, retirement, personal finance and more - straight to your e-mail.
Profit and prosper with the best of expert advice - straight to your e-mail.
Answer: Nice try, but ... The deductibility of interest turns on the use of the borrowed money, not the security for the loan. While interest on money borrowed to buy or improve a rental property can be deducted against rental income, money used for a personal purpose, such as paying off a home mortgage, is nondeductible.
Profit and prosper with the best of Kiplinger's advice on investing, taxes, retirement, personal finance and much more. Delivered daily. Enter your email in the box and click Sign Me Up.

-
How Amazon Will Deliver Your Prime Day 2025 Orders — From Vans to Drones
Amazon Prime Day returns July 8–11 with 96 hours of deals, and a wide range of high-tech and flexible delivery options to match the shopping surge.
-
Chase Increases Sapphire Reserve Annual Fee by 45%: Are the New Perks Worth It?
Chase announced sweeping changes to its Sapphire Reserve card.
-
Senate Seeks $6,000 'Bonus' Tax Deduction for Those Age 65 and Older
Tax Reform Under Trump’s ‘big bill,’ the Senate Finance Committee has proposed a larger bonus tax deduction for older adults than the House. Will it pass?
-
2025 Virginia Tax Rebate Checks Coming Soon? What to Know Now
Tax Rebates Given a historic 2025 gubernatorial race, tax policy will remain a key issue for Virginians in the months ahead.
-
Living Abroad as an American? Don’t Miss These Tax Breaks in 2025
International Tax U.S. expats can reduce their tax burden by taking advantage of a handful of tax credits and deductions.
-
Summer Backyard Ideas With Added Tax Benefits for 2025
Tax Tips Find out how these summer 2025 home projects can help you save on taxes next year.
-
Coverdell ESAs vs. 529 Plans: Which Should You Choose?
Savings Accounts These savings accounts can offer tax benefits for school and retirement expenses. Here’s how.
-
Why Your California Utility Bill Could Increase Under Trump's Tax Plan
State Tax Energy bills in the Golden State may shock you if Republican lawmakers in Congress remove certain energy tax credits through Trump's 'big, beautiful bill.'
-
Property Tax Relief Bill in Texas: What to Know for 2025
Property Tax Texas residents could get major relief from property taxes in 2025. Here's a breakdown of the tax cuts.
-
Homeschoolers Could Soon Save on Expenses With 529 Plans
Savings Accounts A new House GOP bill could change how you save for your child's homeschool education. Find out how.