Twenty years ago, it would have been shocking for the Chicago Children’s Choir to run a singing telegram business and a Ben & Jerry’s Scoop Shop or for Shelter, Inc., of Contra Costa County, a California organization dedicated to serving the homeless, to launch a property management firm. Today, it seems routine. Promoted in books and articles, conferences and courses, earned-income initiatives are becoming accepted—even expected—throughout the nonprofit world. In a 2003 Bridgespan Group survey of U.S. nonprofits’ executives, half of the respondents said they believed earned income would play an important or extremely important role in bolstering their organizations’ revenue in the future.

A version of this article appeared in the February 2005 issue of Harvard Business Review.