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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!

Wendy Weir ABR, CRS, GRI, SRES, CDPE. RE/MAX Right Choice Milford, CT (203) 668-0509 Real Estate Broker Licensed in CT EXPERIENCE: Accredited Buyer Representative (ABR) Certified Residential Specialist (CRS) Senior Residential Specialist (SRES) Graduate Realtor Institute (GRI) AFFILIATIONS: National Association of REALTORS® (NAR) Connecticut Association of REALTORS® (CAR) New Haven Middlesex Association of REALTORS® SMART MLS EDUCATION: University of Bridgeport Certified Distressed Property Expert (CDPE) SRI Designation / CRS designation / ABR designation SRES (seniors designation RENE (Negotiation Expert) COMMUNITY: Past President Milford Chamber of Commerce Milford Economic Development Commission Past Director, Greater New Haven Association of REALTORS® PERSONAL: Consistent multi-million-dollar producer Consistent 100% Club Award – RE/MAX Hall of Fame 2002 – Present #5 in CT for individual RE/MAX agents 2009 RE/MAX Platinum Award 2000-2005 RE/MAX Lifetime Achievement Award Five Star Professional Award 14 consecutive years TESTIMONIALS: “Moving is stressful--Wendy went above and beyond and took care of everything, so that I could BREATHE; she made the process fun and educated me every step of the way. She is professional, experienced, & well respected in the field. She knows everybody. Don't waste time & energy with lazy, inexperienced brokers who tell YOU to search on line, and do drivebys. Call Wendy Weir; she'll find you your perfect place! SO GRATEFUL THAT I FOUND HER!” “Wendy Weir has sold a home for us, found a rental for us and recently found me the home we wanted to purchase. She is extremely experienced and is full of excellent advice. She made the whole experience feel easy! I highly recommend her and wouldn't turn to anyone else.” Contact Me Visit my Website Send a Referral Subscribe to Newsletter