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
Income tax in the United States individuals and corporations in some jurisdictions. Some states impose alternative or additional taxes based on a second measure of income or capital. States and localities tend to tax all income of residents. States and localities only tax nonresidents on income allocated or apportioned to the jurisdiction. Generally, nonresident individuals are taxed on wages earned in the state based on the portion of days worked in the state. Many states require partnerships to pay tax for nonresident partners. Tax returns are filed separately for states and localities imposing income tax, and may be due on dates that differ from federal due