What percentage of income is an employee required?

The percentage of income an employee is required to contribute can vary based on the context, such as taxes, retirement plans, or health insurance. For example, in the United States, Social Security tax is typically 6.2% of an employee's gross income up to a certain limit, while Medicare tax is 1.45% with no income limit. Additionally, retirement plans like 401(k)s often have voluntary contribution percentages set by the employee, commonly ranging from 3% to 15%. Always check specific regulations and company policies for accurate figures.