Income tax in the United States income taxes. This foreign tax credit is limited to that part of current year tax caused by foreign source income. Determining such part involves determining the source of income and allocating and apportioning deductions to that income. States tax resident individuals and corporations on their worldwide income, but few allow a credit for foreign taxes. In addition, Federal income tax may be imposed on non-resident non-citizens, including corporations, on U.S. source income. Federal tax applies to interest, dividends, royalties, and certain other income of nonresident aliens and foreign corporations at a flat rate of 30%. This rate is often reduced
Income tax in the United States made frequently to change tax laws, often with the backing of specific interest groups. Organizations making such proposals include Citizens for Tax Justice, Americans for Tax Reform, Americans for Tax Fairness, Citizens for an Alternative Tax System, Americans For Fair Taxation, and FreedomWorks. Various proposals have been put forth for tax simplification in Congress including the "Fair Tax Act" and various Flat tax plans. Proponents of a consumption tax argue that the income tax system creates perverse incentives by encouraging taxpayers to spend rather than save: a taxpayer is only taxed once on income spent immediately, while any interest earned