Only 18 to 24 years old1% of wage earners (7% overall) make $100,000 or more per yearThese age groups are among the low-income earners in the United States. Americans between the ages of 25 and 35 are seeing the largest increases in income. Only 2% of 25-year-olds make more than $100,000 a year, but by age 35 it's 12%.