Another Marriage Penalty for Taxpayers
A new reason to stick to cohabitation -- if you and your devoted have a giant mortgage.


Getting married may make your mom happy, but if you are a high-income couple, there’s a good chance your taxes will go up. That’s because your combined income could force you to pay a higher federal tax bill than you would have owed had you stayed single.
Now there may be another reason to break your mother’s heart. Thanks to a change in IRS rules last year, an unmarried couple can deduct twice as much of their mortgage- and home-equity-debt interest.
After losing a court case, the IRS agreed that the limits on deductions for mortgage interest—$1 million of mortgage debt plus $100,000 in home-equity financing—apply on a per-taxpayer basis, not a per-residence basis. A married couple is considered one taxpayer; an unmarried couple, two. That means an unmarried couple could deduct interest on a combined $2.2 million of mortgage debt.
From just $107.88 $24.99 for Kiplinger Personal Finance
Be a smarter, better informed investor.

Sign up for Kiplinger’s Free 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.
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.

Block joined Kiplinger in June 2012 from USA Today, where she was a reporter and personal finance columnist for more than 15 years. Prior to that, she worked for the Akron Beacon-Journal and Dow Jones Newswires. In 1993, she was a Knight-Bagehot fellow in economics and business journalism at the Columbia University Graduate School of Journalism. She has a BA in communications from Bethany College in Bethany, W.Va.
-
Small Businesses Are Racing to Use AI
The Kiplinger Letter Spurred on by competitive pressures, small businesses are racing to adopt AI. A recent snapshot shows the technology’s day-to-day uses.
-
The Me-First Rule of Retirement Spending
Follow the 'Me-First" rule and you won't have to worry about running out of money when the stock market goes south.
-
The Final Countdown for Retirees with Investment Income
Retirement Tax Don’t assume Social Security withholding is enough. Some retirement income may require a quarterly estimated tax payment by the September 15 deadline.
-
Standard Deduction 2025 Quiz: How Much Do You Really Know?
Quiz Test your knowledge of IRS rules that impact how much money you keep in your wallet.
-
IRS in Turmoil: GOP Budget Cuts and Staff Shake-Ups Threaten Taxpayer Services
IRS Republican lawmakers advance a controversial budget bill that would gut IRS funding further, risking your 2026 tax filing season.
-
Cruise Lines Sue to Block Hawaii’s New Climate Tourism Tax
State Tax Your vacation to the Aloha State could come at a higher price tag next year. Here’s why.
-
21 Last-Minute Gifts for Grandparents Day 2025 to Give Right Now
Holiday Tips Last-minute gifting is never easy. But here are some ideas to celebrate Grandparents Day.
-
New $6,000 'Senior Bonus' Deduction: What It Means for Taxpayers Age 65-Plus
Tax Changes If you’re an older adult, a new bonus tax deduction could provide a valuable tax benefit. Here's how it works.
-
Claiming the Standard Deduction? Here Are 10 Tax Breaks For Middle-Class Families in 2025
Tax Breaks Working middle-income Americans won’t need to itemize to claim these tax deductions and credits — if you qualify.
-
Over Age 65? New $6,000 'Senior Bonus' Deduction Is Available Even If You Itemize
Tax Changes If you’re an older adult, a new bonus tax deduction could provide a valuable tax benefit. Here's how it works.