In the United States, the biggest sources of revenue for the federal government come from taxes. Specifically, the type of taxes that account for the most revenue are income taxes, payroll taxes, excise taxes, and corporate income taxes. Let's look at these in more detail:
• Income Taxes: This includes taxes on wages, salaries, investment income, and any other forms of income. The largest portion of tax revenue for the federal government comes from individual income taxes.
• Payroll Taxes: This includes taxes such as Social Security and Medicare. These taxes are paid by both employers and employees in order to fund various government programs.
• Excise Taxes: This includes taxes on the sale of specific goods or services, such as gasoline, alcohol, or cigarettes.
• Corporate Income Taxes: This type of tax is paid by businesses on the income they generate.
Additionally, there are other smaller sources of revenue for the federal government, such as taxes on estates and gifts, customs duties, and interest earned on government debt.
It's important to note that the percentage of taxes paid by different entities may vary depending on the type of tax and the context. For example, some taxes may be shouldered more by the wealthy and some by the lower and middle classes.
For more information, you can take a look at this list of the top 10 sources of federal revenue for 2018, published by the Congressional BudgetOffice:
https://www.cbo.gov/publication/55184