Basis is the amount of your investment in property for tax purposes. Use the basis of property to figure depreciation, amortization, depletion, and casualty losses. Also use it to figure gain or loss on the sale or other disposition of property. You must keep accurate records of all items that affect the basis of property so you can make these computations.

This publication is divided into the following three sections.

• Cost Basis.
• Adjusted Basis.
• Basis Other Than Cost.

The basis of property you buy is usually its cost. You may also have to capitalize (add to basis) certain other costs related to buying or producing the property.

Your original basis in property is adjusted (increased or decreased) by certain events. If you make improvements to the property, increase your basis. If you take deductions for depreciation or casualty losses, reduce your basis.

You cannot determine your basis in some assets by cost. This includes property you receive as a gift or inheritance. It also applies to property received in an involuntary conversion and certain other circumstances.

Comments and suggestions. We welcome your comments about this publication and your suggestions for future editions.

You can e-mail us while visiting our web site at www.irs.gov/help/email2.html.

You can write to us at the following address:

Internal Revenue Service
Technical Publications Branch
W:CAR:MP:FP:P
1111 Constitution Ave. NW
Washington, DC 20224

We respond to many letters by telephone. Therefore, it would be helpful if you would include your daytime phone number, including the area code, in your correspondence.

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