A contractor is an independent entity that supplies services, equipment, personnel, supplies, or goods. You may work with several contractors regularly, but they aren't necessary employees of your business. Rather, they work based on an agreed-upon contract for a specific task or a period of time.
Contractors work for themselves, negotiate contracts, have clients, and many contract other workers to assist them in their activities, enlisting subcontractors to handle all of the work they were contracted to perform.
A contractor agreement creates an outline for all of the materials or services expected, as well as detailed costs, warranty information, and contractor pay. To put it in a nutshell, a contractor is a self-employed individual another company enlists the services of.