Before 1996, the Internal Revenue Service (IRS) relied on the 20 factors identified in Rev. Rul. 87-41 in order to determine a worker’s status.
Please see the Independent Contractor Rules of Thumb for a complete list of the 20 factors.
In 1996, the IRS developed the following three-factor test to determine worker classification, known as "Common Law Rules:"
Behavioral Control – Does the business have the right to direct or control how the service provider provides the service?
Financial Control – Does the business have the right to control the economic aspects (i.e., the method of payment, reimbursements, provision of tools and supplies) of the worker’s job?
Relationship of the Parties – How do the worker and the business perceive the relationship?