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The professional class, also called the upper middle class, consists mostly of highly educated white collar salaried professionals, whose work is largely self-directed. In 2005, these household incomes commonly exceed $100,000 per year.
An individual living alone could describe herself as middle class while making significantly less than a family of four who also sees themselves as middle class. Middle Class Income for a Family The annual average income for a middle class family of four is approximately $70, 354.