Average effective tax rates, number of tax returns, total adjusted gross income, and total tax after credits, for highest AGI groups, 1945 to 2020.

Average federal tax rates for elderly headed households, by comprehensive household income quintile.

Average federal tax rates for nonelderly childless households, by comprehensive household income quintile.

Number of households, average pretax and after-tax income, shares of pretax and after-tax income, and income category minimums for all households, by comprehensive household income quintile.

Number of households, average pretax and after-tax income, shares of pretax and after-tax income, and income category minimums for households with children, by comprehensive household income quintile.

Amounts of realized capital gains, taxes paid, average effective tax rates, and maximum tax rate on long-term capital gains, for tax years 1954 to 2014. Data unavailable for recent years.

Number of households, average pretax and after-tax income, shares of pretax and after-tax income, for elderly headed households, by comprehensive household income quintile.