max federaltax rate
From 1979 to 2007 the average federal income tax rate fell 110% for the second lowest quintile, 56% for the middle quintile, 39% for the fourth quintile, 8% for the highest quintile, and 15% for the top 1%, with the bottom quintile moving from a tax rate of zero to negative liability. The highest marginal tax rate for individuals for U.S. federal income tax purposes for tax years 1952 and 1953 was 92%. 2  Since 1964, the threshold for paying top income tax rate has generally been between $200,000 and $400,000.