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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.
You can find people earning 7 figures who think they are middle class - by income definition (and a generous one at that), household making between $30,000 and $100,000 are middle class. The top 5% are household incomes of $165,000 and up.