6. The Middle Class. While others attempt to define the middle class by income alone (many see a household income of around $50,000 as qualifying), I define the middle class not by income alone but by purchasing power, benefits and assets owned. What Does It Take To Be Middle Class? (December 5, 2013).
By this definition, the middle class is the cohort between 70% and 90%--households earning $80,000 or more. Even this is problematic, because in high-cost cities $80,000 is not enough to sustain middle-class conventions (owning a home, reliable vehicles, retirement funds, etc.) while it may be ample in lower-cost regions.
This 20% comprises about 24 million households.
The lower middle class--what I define as having some but not all of the attributes of full middle class membership--is the cohort between 50% and 70%--households earning more than $55,000 annually.
This class also comprises about 20% (24 million) of all households.
7. The Working Poor. Roughly 38 million households have earned income but it is not sufficient to secure the basics of middle class life. Many qualify for social welfare programs such as food stamps and Medicaid.
This class is about 30% of all households.
To read about the other six classes, see; http://www.oftwominds.com/blogapr15/9-classes-work4-15.html