How do you calculate adjusted cost basis?
Christopher Davis
Updated on March 17, 2026
The adjusted basis is calculated by taking the original cost, adding the cost for improvements and related expenses and subtracting any deductions taken for depreciation and depletion.
Can you adjust cost basis?
Adjusting your cost basis You can adjust your original purchase price for a variety of reasons. When you buy stocks, for example, you typically calculate the initial cost basis by adding commissions and fees to the per-share purchase price.
Do you report cost basis or adjusted cost basis?
The cost basis reported on Form 1099-B reflects the purchase price only and doesn’t account for income reported by your employer, due to IRS regulations. The Supplemental Information Form will show an adjusted cost basis that accounts for the income reported by your employer.
What can be added to an adjusted cost basis?
A renovation or room addition can be added to the original cost basis for a homeowner to adjust the amount up. Legal fees associated with the purchase or sale of the asset, title and escrow fees, transfer fees and sales tax may also be used to adjust the cost basis up. 3
How is the adjusted basis of a home determined?
If you made improvements to the home (Ex: you renovated your kitchen), add the cost to your home’s basis: Here’s how to determine the basis of other property you might get: Inherited property is usually the Fair Market Value (FMV) of the property at the date of death. When there’s a gain, that’s the donor’s adjusted basis.
How is the cost basis of an asset determined?
An investment or asset’s cost basis is defined as the amount of the initial investment, or the original purchase price. It is the determinant for the extent to which capital gains tax is assessed and paid once the investment or asset is sold.
Can a renovation be added to the cost basis?
A renovation or room addition can be added to the original cost basis for a homeowner to adjust the amount up. Legal fees associated with the purchase or sale of the asset, title and escrow fees, transfer fees and sales tax may also be used to adjust the cost basis up.
