Question: what was the highest income tax rate in us history?
Answer: The top marginal tax rate was reduced to 58% in 1922, to 25% in 1925 and finally to 24% in 1929. In 1932 the top marginal tax rate was increased to 63% during the Great Depression and steadily increased, reaching 94% in 1944 (on income over $200,000, equivalent of $2,868,625 in 2018 dollars).