Researchers can find charts and tables of historical marginal income tax rates for the United States on TaxFoundation.org and CCH.com. Users download Excel and PDF files to view charts in nominal dollar amounts on the Tax Foundation website. CCH reveals top marginal income tax rates back to 1913.Continue Reading
Figures for the Tax Foundation list the most recent year first and work backward chronologically as researchers scroll down the document, notes TaxFoundation.org. Marginal tax rates on CCH.com reveal the top income tax rates paid by the richest Americans.
A marginal tax rate is the amount of tax paid on an additional dollar of income, says Investopedia. The IRS divides American taxpayers into ranges that have low-income earners paying a lower rate than high-income earners.Learn more about Taxes