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The Daily Insight

How is adjusted basis of property calculated?

Author

James Williams

Published Mar 04, 2026

To calculate an asset’s or security’s adjusted basis, you simply take its purchase price and then add or subtract any changes to its initial recorded value. Capital gains tax is paid on the difference between the adjusted basis and the amount the asset or investment was sold for.

How do you calculate basis in primary residence?

To calculate the cost basis, add the costs of purchase, capital expenses and cost of sale together. The total is your true cost basis for the property. If in our example, you had capital expenses, purchase costs and selling expenses of $150,000, your cost basis would be $250,000.

How to determine the adjusted basis of a sold home?

In most instances, your purchase price is not your cost basis. When you bought your home, you probably also paid some closing costs. You cannot include costs that you incurred in obtaining a mortgage or prepaid expenses, but you can deduct legal fees, utility connection charges, title fees,…

What’s the difference between basis and adjusted basis?

Your adjusted basis is generally your cost in acquiring your home plus the cost of any capital improvements you made, less casualty loss amounts and other decreases. For more information on basis and adjusted basis, refer to Publication 523, Selling Your Home.

What happens to the basis when you sell a property?

Even if the sales price is higher than you anticipated and if the basis moves up, the gap between the basis and sale price (i.e., gain) will decrease. Whether you use a loan or not doesn’t change the basis; as an example, you purchase a property for $500,000.

What can be added to the basis of a home?

For a detailed explanation of items that can be added to the basis of a home including types of improvements, see this IRS Publication 523 –