The decision to develop an estimated income scale arose from a wish to prove or disprove the statement that colleges like Brown University may be headed toward a situation where the student body will consist of the rich and the poor, the traditional group of middle class having been eliminated. As the research proceeded, it became evident that an instrument could be created with potential far beyond the original intention, providing a valuable dimension for a planning office making projections of future needs and the resources to meet those needs. Further, such a scale would have immediate value for officials concerned with admission, financial aid, fund raising and alumni relations. This document presents a model of the scale described above and discusses in detail the possible uses of such a scale. (Author/HS)