Calculating Property Cost Basis
In simple terms, when people talk about the term "basis," that term refers to the cost of the property adjusted for improvements and can be adjusted up or down for other reasons. If the property was vacant land when you bought it and it cost you $5,000, your basis at that time was $5,000. If you put a home on it at a cost of $35,000, the basis of your property would have been $40,000 even though the home might have caused the land and home to be worth much more than the $40,000.