The largest source of federal revenue is the?

• A. Capital gains tax
• B. Social Security tax
• C. Property tax
• D. Income tax

Answer: (D)

The largest source of federal revenue in the United States is the income tax. The federal government levies taxes on individuals and businesses' earnings, which comprises a significant portion of the total revenue collected. The income tax system is progressive, meaning that tax rates increase as income levels rise. This structure allows the government to collect substantial revenue from higher-income earners, ensuring that the system effectively funds various federal programs and services.

While other taxes, such as corporate taxes and payroll taxes (including Social Security and Medicare taxes), contribute to federal revenue, they do not generate as much income as the individual income tax. The income tax is central to the federal budget and plays a crucial role in funding government operations, public services, and entitlement programs. Therefore, it is accurate to identify the income tax as the primary source of revenue for the federal government.