USA is one of two states in the world that taxes its non-inhabitant citizens on worldwide income, in the same way also rates as residents; another is Eritrea. The U.S. Supreme Court maintained the constitutionality of imposition of such a tax in the case of Cook v. Tait.
Wages taxes are enforced by the federal or all state governments. These include Social Security or Medicare taxes enforced on both employers also employees, at a combined rate of 15.3% (13.3% for 2011 and 2012). Social Security tax applies only to the first $106,800 of wages in 2009 through 2011. Nonetheless, benefits are just accrued on the first $106,800 of salary. Employers should withhold earning taxes on salary. An unemployment tax also particular another picks up apply to employers. Salary taxes have dramatically increased as a part of federal revenue since the 1950s, while corporate earning taxes have fallen as a share of revenue. (Company profits have not fallen as a share of GDP).
Wealth taxes are imposed by most local governments and many special aim authorities based on the fair market value of treasure. School and other authorities are oftentimes separately governed, or impose separate taxes. Treasure tax is mostly enforced only on realty, though some jurisdictions tax some forms of business wealth. Property tax rules or rates differ widely with annual median rates ranging from 0.2% to 1.9% of a wealth’s value depending on the state.