Realized 1031 Blog Articles

How to Calculate Capital Gains When Selling Partial Ownership of Property

Written by The Realized Team | Oct 13, 2025

Selling partial ownership of an investment property can be a strategic move for property owners seeking to diversify their portfolio or unlock some value. However, understanding how to calculate capital gains in such scenarios is crucial for effective financial planning and to avoid surprises at tax time. Here’s a concise guide geared toward property owners on how to navigate the calculation.

Understanding Capital Gains

Capital gains are the profits realized when an asset is sold for more than its purchase price. For real estate investments, calculating capital gains involves determining the difference between the sale proceeds and the property's adjusted basis. The adjusted basis generally includes the original purchase price plus any improvements, minus depreciation.

Determine the Adjusted Basis

Start by figuring out the adjusted basis of the partial interest being sold. This involves:

  • Initial Investment: Calculate your share of the original purchase price.
  • Improvements and Costs: Add any capital improvements made during the time you held the investment. These could include renovations or major repairs.
  • Depreciation: Subtract any depreciation previously claimed on your tax returns. Depreciation reduces your taxable basis, which in turn impacts your capital gains.

For example, if you own 50% of a property and your share of the original purchase was $200,000, with improvements worth $20,000 and depreciation of $15,000, your adjusted basis would be $205,000.

Calculate the Sales Proceeds

Determine your proportionate share of the sales proceeds from the transaction. This is typically straightforward if the sale involves the entire property, but requires careful allocation if only a partial interest is sold.

Compute the Capital Gain

Subtract the adjusted basis from the sales proceeds to find your capital gain. If the proceeds exceed the adjusted basis, the result is a taxable gain.

Example:

Suppose you sell your 50% interest in a property for $250,000. If your adjusted basis is $205,000, your capital gain would be $45,000 ($250,000 - $205,000).

Potential Tax Implications

The tax rate on capital gains varies depending on how long you've held the property. Long-term capital gains (assets held over a year) benefit from a lower tax rate compared to short-term capital gains, which are taxed as ordinary income.

Additionally, the concept of "recapture" applies where previous depreciation deductions may be taxed at a higher rate upon sale, up to 25%. Ensuring accurate records of depreciation and improvements can be crucial.

Consider Professional Advice

Given the complexities involved, consulting with a tax professional is often advisable. They can offer personalized advice and ensure all considerations, like state-specific tax regulations and opportunities for deferrals like 1031 exchanges, are addressed.

In conclusion, while calculating capital gains for partial ownership sales involves several steps, having a clear understanding of your initial investment, associated improvements, depreciation, and precise sales proceeds is essential. Proper calculation not only aids in tax planning but also supports strategic financial decisions regarding property investments. 

For a seamless process, keep meticulous records and seek professional guidance to ensure compliance with taxation rules and optimized financial outcomes.