Don't Let Capital Gains Tax Surprise You - 6/11/2025

If you've owned your home for a long time, chances are its value has increased—maybe even doubled, tripled, or more. But did you know that a law written in 1997 still limits the amount of capital gains tax exclusion, despite skyrocketing home prices?

Currently, homeowners can exclude up to $250,000 in gains if single or $500,000 if married filing jointly when selling their primary residence, as long as they've lived there for at least two of the last five years. But with today's home values, more sellers are finding themselves exceeding this exclusion and facing a significant tax bill.

More Homeowners Are Now Affected

In 2023, nearly 8% of home sales surpassed the $500,000 capital gains exclusion. However, in high-cost states like California (28.8%), Hawaii (23.8%), Washington, D.C. (22.1%), Massachusetts (17.9%), and Washington State (15.2%), the numbers were far higher, according to CoreLogic.

What Happens If You Exceed the Exclusion?

If a homeowner sells their home for more than the exclusion allows, the excess profit is subject to long-term capital gains tax rates of 15% to 20%, plus an additional 3.8% net investment income tax for high earners.

For example, if a married couple sells their home with $1 million in gains, they can exclude $500,000, but the remaining $500,000 is taxed at these rates. Depending on their income bracket, they could owe between $95,000 and $119,000 in taxes; an expense many homeowners don't anticipate.

How to Reduce Your Capital Gains Tax Liability

The key to minimizing capital gains tax is increasing your home's cost basis, which is done by tracking capital improvements made over the years. Many homeowners are aware that large-scale renovations count, but small-dollar upgrades also qualify and can add up significantly over time.

What qualifies as capital improvements:

  • Kitchen and bathroom remodels
  • New roofs, HVAC systems, and water heaters
  • Adding a deck, patio, or additional living space
  • Energy-efficient upgrades like new windows or solar panels
  • Permanent landscaping enhancements, like retaining walls or irrigation systems

However, repairs and maintenance (like painting, fixing leaks, or replacing worn carpet) typically do not qualify unless they are part of a larger renovation.

The Importance of Tracking Expenses

To take advantage of these tax-saving opportunities, homeowners must document their improvements throughout their entire homeownership.

  • Keep receipts for materials and labor
  • Take before-and-after pictures of major renovations
  • Save contractor invoices or permits for work done
  • Maintain a running list of all home upgrades

Without proper records, homeowners could lose out on thousands in potential tax savings.

Stay Informed and Plan Ahead

The capital gains tax law may not have adjusted to today's market, but smart homeowners can take proactive steps to minimize their tax burden. If you're thinking about selling, now is the time to gather your records and consult with a tax professional to ensure you're maximizing your cost basis.

For more information, download IRS Publication 523 and our Homeowners Tax Guide for a detailed look at what qualifies.

If you have any questions about how today's home values impact your potential sale, feel free to reach out...I'm happy to help!

Madolyn Greve, Global Real Estate Sales Broker Associate ABR, AHWD, CNE, CRS, e-PRO, GREEN, SRS, SRES Callaway Henderson Sotheby's International Realty Princeton, NJ (609) 462-2505 MadolynGreve@CallawayHenderson.com 8644010 Madolyn Greve Global Real Estate Sales Broker Associate Callaway Henderson Sotheby's International Realty Princeton Office 4 Nassau Street, Princeton, NJ 08542 MadolynGreve@CallawayHenderson.com, Text/Call: 609-462-2505 "Your Trusted Real Estate Advisor for the Greater Princeton Area" I enjoy the process of listening to my clients' needs and educating and advising them to move forward with decisions that are beneficial to their goals achieving List Price vs. Sales Price 98.11% in the past 25 years. I am loyal and present throughout the entire real estate transaction whether representing a buyer, seller, tenant, or landlord. It is my priority to remain knowledgeable and familiar with the ever changing real estate market in order to provide top-quality service. My desire is to provide gracious and personal customer service assisted with today's cutting edge technology. Through my actions it is apparent that I covet my reputation and exhibit a strong desire to guide you with honesty and integrity. I practice real estate full time in New Jersey and have held a real estate Certifications & Designations ABR, AHWD, CNE, e-PRO, CRS, GREEN, SRS, SRES Broker Sales Associate, ABR, Accredited Buyer Representative®,AHWD, At Home with Diversity, CRS, Certified Residential Specialist, Council of Residential Specialists, GREEN, The Green Resource Council, SRS, Seller Representative Specialist, The Council of Real Estate Brokerage Managers, SRES, Seniors Real Estate Specialist® The SRES Council. Awards: I am honored to be recognized as a FIVE STAR real estate agent receiving the Professional Exceptional Service Award for 13 years through the votes of my clients. My Community Involvement: The Princeton Mercer Regional Chamber of Commerce, The National Association of Realtors, The Nassau Club of Princeton, The Present Day Club of Princeton, The Junior League of Greater Princeton, Chi Omega Fraternity and The Nassau Presbyterian Church.I I have owned my home in the "Littlebrook Area" of Princeton for the past 35 years. I happily reside with my Coton de tulear, Bentley Winston. Contact Me Send a Referral Subscribe to Newsletter