You are not an independent contractor if you perform services that can be controlled by an employer (what will be done and how it will be done). This applies even if you are given freedom of action. What matters is that the employer has the legal right to control the details of how the services are performed.

If an employer-employee relationship exists (regardless of what the relationship is called), you are not an independent contractor and your earnings are generally not subject to Self-Employment Tax.

However, your earnings as an employee may be subject to FICA (Social Security tax and Medicare) and income tax withholding.

For more information on determining whether you are an independent contractor or an employee, refer to the section on Independent Contractors or Employees.