Understanding Capital Gains on Your Home Sale - 12/31/2025

Selling your home can be a significant financial event and it's important to understand how capital gains taxes may apply. Fortunately, U.S. tax law offers generous exclusions for homeowners under certain conditions, and with proper recordkeeping, many can reduce or eliminate their tax burden altogether.

Here's what every homeowner should know about capital gains, exclusions, and the importance of documenting improvements.

What Are Capital Gains?

Capital gain is the profit you make from selling your home. It's calculated as the difference between your adjusted cost basis and the sale price (minus allowable selling costs, such as real estate commissions).

Sale Price ... (Purchase Price + Capital Improvements + Selling Costs) = Capital Gain

Capital Gains Exclusion for Your Primary Residence

Under IRS rules, if the home you're selling is your primary residence, you may be eligible to exclude a portion of the capital gain from taxation.  If the home you're selling is your primary residence, you may be able to exclude up to $250,000 in capital gains if you're single, or up to $500,000 if you're married and file jointly.

To qualify, you must have owned and lived in the home for at least two of the five years before the sale, and you must not have used this exclusion on another property in the past two years. This exclusion can make a significant difference in the net proceeds from your sale.

Example: A married couple sells their home for $800,000. They bought it for $400,000 and made $50,000 in qualifying improvements. After deducting $30,000 in selling expenses, their gain is $320,000. Since that's under the $500,000 exclusion, they owe no capital gains tax.

Why Tracking Home Improvements Matters

Your cost basis isn't just the purchase price; it includes the cost of capital improvements made to the home. These improvements can reduce your taxable gain by increasing your basis.

Capital improvements are upgrades that either add value to the home, prolong its useful life, or adapt it to new uses.  It is only necessary to meet one of these requirements.

Examples of improvements that increase your basis:

  • Adding a room or garage
  • Installing a new roof or HVAC system
  • Remodeling a kitchen or bathroom
  • Replacing windows or flooring
  • Building a deck or finishing a basement

Routine maintenance and repairs, such as painting, fixing a leaky faucet, or patching a roof, do not qualify. They may be necessary, but they don't add to your basis.

Pro Tip: Keep a Home File

Keeping a folder or digital record that includes purchase documents, receipts for improvements, contractor invoices, permits and plans, and records of major appliance installations can be valuable for proof in case of an audit.  Photos before and after can also be helpful.

This documentation can make a significant difference when it's time to sell and report your capital gain.  For more information, contact your tax professional and download IRS Publication 530.

In Summary

  • Capital gains are based on your sale price minus your adjusted cost basis.
  • Homeowners may exclude up to $250,000 (single) or $500,000 (married) in gains on their primary residence.
  • Documenting improvements is essential to reduce your potential tax bill.
  • Only capital improvements, not maintenance, add to your cost basis.

By understanding these rules and keeping good records, you can make the most of the tax advantages of homeownership and retain more of your equity when you sell.  Download our Homeowners Tax Guide.

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 Visit my Website Send a Referral Subscribe to Newsletter