The base of the federal corporate income tax includes net income from business operations (receipts, minus the costs of purchased goods, labor, interest, and other expenses). It also includes net income that corporations earn in the form of interest, dividends, rent, royalties, and realized capital gains. The statutory rate of tax on net corporate income ranges from 15 to 35 percent, depending on the amount of income earned. The United States taxes the worldwide income of domestic corporations, regardless of where the income is earned, with a foreign tax credit for certain taxes paid to other countries. The timing of the tax liability depends on several factors. For example, income earned not by the domestic corporation, but by a foreign subsidiary is generally not taxed until a distribution-such as a dividend-is made to the U.S. corporation.