Doyle v. Mitchell Bros. Co., 247 U.S. 179 (1918), was a United States Supreme Court case defining gross income.

The case held that gross income includes the gain on sale of assets, i.e., the proceeds less cost basis.

On the gross income question, the Court stated in paragraph 13, "In order to determine whether there has been gain or loss, and the amount of the gain if any, we must withdraw from the gross proceeds an amount sufficient to restore the capital value that existed at the commencement of the period under consideration."

On the timing question, the Court found, in paragraph 17, that the mere harvesting of timber did not give rise to income.

This article related to the Supreme Court of the United States is a stub.