The United States
Revenue Act of 1913 also known as the
Tariff Act,
Underwood Tariff,
Underwood Act,
Underwood Tariff Act, or
Underwood-Simmons Act (ch. 16, , October 3, 1913), re-imposed the federal
income tax following the ratification of the
Sixteenth Amendment and lowered basic
tariff rates from 40% to 25%, well below the
Payne-Aldrich Tariff Act of 1909. It was signed into law by President
Woodrow Wilson on October 3, 1913, and was sponsored by
Alabama Representative
Oscar Underwood.