Legal history of income tax in the United States adopted an income tax modeled on the tax instituted in England. The British theory was that you tax the income from property, and not the property itself; thus, sales of property were not subject to taxation. In order to help pay for its war effort in the American Civil War, the United States government imposed its first personal income tax, on August 5, 1861, as part of the Revenue Act of 1861. Tax rates were 3% on income exceeding $600 and less than $10,000, and 5% on income exceeding $10,000. This tax was repealed and replaced by another income tax
Income tax in the United States a tax on property and it certainly is not a capitation tax; therefore, it need not be apportioned. ... Congress has the power to impose taxes generally, and if the particular imposition does not run afoul of any constitutional restrictions then the tax is lawful, call it what you will. Federal and state income tax rates have varied widely since 1913. For example, in 1954, the federal income tax was based on layers of 24 income brackets at tax rates ranging from 20% to 91% (for a chart, see Internal Revenue Code of 1954). Below is a table of historical