“Using the two later waves (14 and 15) from the 2008 Survey of Income and Program Participation panel, this table package presents income and earnings estimates at the individual, family and household level for the first quarter (January, February and March) 2013. Estimates are provided by selected demographic characteristics, such as gender, race/ethnicity, age, marital status and highest level of educational attainment. Monthly income and earnings estimates for individuals, families, and households are also included.”

Income: http://www.census.gov/programs-surveys/sipp/publications/tables/income.html

Earnings: http://www.census.gov/programs-surveys/sipp/publications/tables/earnings.html