Better Homeowners
Top Producers / True Professionals Since 1983

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.

The Alan Smith Team RE/MAX PROFESSIONALS Littleton, CO (303) 503-2526 98573T Alan J. Smith CRS, GRI Broker/ Owner RE/MAX Professionals Alan has been a licensed Realtor since 1983. He is one of the Broker/Owners of RE/MAX Professionals, and holds the CRS, GRI, CDPE, and CLHMS Designations which gives him expertise in all aspects of negotiating Residential Real Estate including as a Certified Luxury Home Marketing Specialist. He is also a CRB Candidate which specializes in Residential Brokerage Administration. After spending 10 years with Century 21 early in his career, Alan joined RE/MAX Professionals in January of 1994. Alan absolutely enjoys working with the best Realtors in the business and thrives with the Top Producers and True Professionals at RE/MAX Professionals. He is a member of the RE/MAX Diamond Award Club, and has been inducted into the RE/MAX Hall of Fame and received the Lifetime Achievement Award. Alan entered the Pinnacle of RE/MAX Honors in 2010 as he was inducted into the RE/MAX Circle of Legends. . He is a Broker/Owner of RE/MAX Professionals with 9 offices and approximately 500 agents. Alan is currently the President of Professionals Investment Group, d/b/a RE/MAX Professionals, and also served as the Chairman of the REColorado Board of Directors, and currently is a Director on that Board. Alan J. Smith RE/MAX Professionals 8500 W. Bowles Avenue, Suite 100 Littleton, CO 80123 303-503-2526 Cell 303-932-3306 Office alan@alanjsmith.com TheAlanSmithTeam.com Contact Me Visit my Website Send a Referral Subscribe to Newsletter