Progressivity in United States income tax

In general, the United States federal income tax is progressive, as rates of tax generally increase as taxable income increases, at least with respect to individuals that earn wage income. As a group, the lowest earning workers, especially those with dependents, pay no income taxes and may actually receive a small subsidy from the federal government (from child credits and the Earned Income Tax Credit).

Source: Wikipedia — Progressivity in United States income tax (CC BY-SA 4.0)