Income tax in the United States Income tax in the United States Income taxes in the United States are imposed by the federal, most state, and many local governments. The income taxes are determined by applying a tax rate, which may increase as income increases, to taxable income, which is the total income less allowable deductions. Income is broadly defined. Individuals and corporations are directly taxable, and estates and trusts may be taxable on undistributed income. Partnerships are not taxed, but their partners are taxed on their shares of partnership income. Residents and citizens are taxed on worldwide income, while nonresidents are taxed only on income
Legal history of income tax in the United States bonds) was within the category of an excise or duty, and was neither a capitation tax (based on population) nor a property tax. The court also concluded that direct taxes, within the meaning of the Constitution, were only capitation taxes and taxes on real estate. In 1894, a Democratic-led Congress passed the Wilson-Gorman tariff. This imposed the first peacetime income tax. The rate was 2% on income over $4000, which meant fewer than 10% of households would pay any. The purpose of the income tax was to make up for revenue that would be lost by tariff reductions. This was