Early Federal income taxes
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its first personal income tax, on August 5, 1861, as part of the Revenue Act of 1861 (3% of all incomes over US $800; rescinded in 1872).
Other income taxes followed, although an 1895 United States Supreme Court ruling, Pollock v. Farmers' Loan & Trust Co., held that taxes on rents from real estate, on interest income from personal property and other income from personal property (which includes dividend income) were direct taxes on property, and therefore had to be apportioned.
Since apportionment of income taxes is impractical, this had the effect of prohibiting a federal tax on income from property.
Due to the political difficulties of taxing individual wages without taxing income from property, a federal income tax was impractical from the time of the Pollock decision until the time of ratification of the Sixteenth Amendment (below).
Ratification of the Sixteenth Amendment
In response, Congress proposed the Sixteenth Amendment (ratified by the requisite number of states in 1913[3]), which states:
The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration.
The Supreme Court in Brushaber v. Union Pacific Railroad, 240 U.S. 1 (1916), indicated that the amendment did not expand the federal government's existing power to tax income (meaning profit or gain from any source) but rather removed the possibility of classifying an income tax as a direct tax on the basis of the source of the income.
The Amendment removed the need for the income tax to be apportioned among the states on the basis of population. Income taxes are required, however, to abide by the law of geographical uniformity.
Some tax protesters and others opposed to income taxes cite what they contend is evidence that the Sixteenth Amendment was never "properly ratified," based in large part on materials sold by William J. Benson.
In December of 2007, Benson's "Defense Reliance Package" containing his non-ratification argument which he offered for sale on the internet, was ruled by a federal court to be a "fraud perpetrated by Benson" that had "caused needless confusion and a waste of the customers' and the IRS' time and resources."[4]
The court stated: "Benson has failed to point to evidence that would create a genuinely disputed fact regarding whether the Sixteenth Amendment was properly ratified or whether United States Citizens are legally obligated to pay federal taxes."[5] See also Tax protester constitutional arguments.