In plating factories from the Sihwa industrial complex, the electrical energy is used for heating the plating solution due to simplicity and convenience. However, other thermal energy instead of electrical energy has been used in plating process in order to increase the energy efficiency and to decrease the risk of accidents. In this study, we perform an economic analysis of the change in heating the plating solution. When LNG and electricity are replaced by steam, we study the cost savings and the cash flow analysis. Finally, we analyse the economics of the use of steam through the discounted payback method.