Individual income taxes are the federal government’s single biggest revenue source. In fiscal year 2018, which ended Sept. 30, the individual income tax is expected to bring in roughly $1.7 trillion, or about half of all federal revenues, according to the Congressional Budget Office.
If past statistics can offer any guidance, in 2016, $1.44 trillion income taxes were paid by 140.9 million taxpayers reporting a total of $10.2 trillion in adjusted gross income, according to data recently released by the Internal Revenue Services.