1057, raised income tax rates over those established the previous year.
[1][2] The bottom tax bracket was expanded but raised from 2% to 6%.
For 1919 and 1920 the top normal tax rate was reduced from 12 percent to 8%.
Even in 1918, only 5% of the population paid federal income taxes (up from 1% in 1913), and yet the income tax funded one-third of the cost of World War I.
A Normal Tax and a Surtax were levied against the net income of individuals as shown in the following table.