A contract should contain the following essential elements: “Change your agreements if your industry changes. Federal and state rules change often, and to reduce risk, you need to make sure customers are involved in liability. Complaints are common in any industry, a strong contract will prevent you from losing profits because you are relaxed and disagree! “says Sharon Tsao, CMO, Contemporary Staffing Solutions. What is the difference between the service contract and the service contract? An understanding of the types of contracts between clients, agencies and contractors and employees is essential for a contractor to be able to determine whether they are working inside or outside the IR35. . . .