On this blog, I discuss important national issues, often, but not always, relating to economic or fiscal matters. Sometimes this means presidential policies, good or bad.
Today, I discuss the changing nature of the U.S. middle class. First, some definitions from the American Enterprise Institute (AEI). To be specific, for a household size of three, we divide income classes into five groups: the Poor (under $40,000), the Lower-middle class ($40,000 – $67,000), the Core-middle class ($67,000 – $133,000), the Upper-middle class ($133,000 – $400,000), and the Rich (above $400,000). Other household sizes have appropriately different cutoffs. Incomes are stated in 2024 dollars, and adjusted for inflation.
Consider:
- First, examine an overall graph of the five income groups, from 1979 – 2024 (see below). Note how each group is changing over time with the biggest growth by far appearing in the Upper-middle class.
- Now look at the percentage changes for each group in 1979, 2001 and 2024 (see below). Clearly, the size of the Poor group and the Lower-Middle Class group are shrinking greatly, the size of the Core-Middle Class group is slightly shrinking, and the size of the Upper-Middle Class is expanding greatly.
- Finally, look at the percentage change in family income by percentile over the same time period (see below). Yes, the higher the percentile, the faster the family income is growing. But all percentile groups are growing in earned income, except for the very bottom group.
Conclusion. What is happening overall in a general sense (see middle graph), is that there are fewer households in the bottom two income groups and a huge increase in the number of households in the fourth highest group. In sum, the number of households below the Core-middle class fell from 54% of the total to 35% of the total. The overall Middle class grew from 70% of the total to 78% of the total, a significant jump. In other words, the middle class is expanding in size (and at the upper end). This is a very beneficial shift for American society overall.































