What are payroll taxes levied on?

Payroll taxes are taxes imposed on employers or employees, and are usually calculated as a percentage of the salaries that employers pay their staff.

Answer:Wages and self-employment

Explanation:

The federal government levies payroll taxes on wages and self-employment income and uses the revenue to fund Social Security, Medicare, and other social insurance programs. Payroll taxes have become an increasingly important part of the federal budget over time, as the chart below shows.