Income Tax

The power to collect income tax is found in the Constitution of the United States. Article 1, Section 8, Clause 1 (Also known as the Taxing and Spending Clause) sates: “The Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States; but all Duties, Imposts and Excises shall be uniform throughout the United States;”

In 1913, the Sixteenth Amendment to the U.S. Constitution was ratified. It 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."

Case Law Prior to the Sixteenth Amendment: