In present study, we generalize order linked trade credit policy in three echelon supply chain system where manufacturer, distributor and retailer are involved and manufacturer provide a delay period to distributor and distributor also provide a order linked trade credit policy to his retailers. Whole study is discussed in time dependent production and demand rate. We model a three echelon supply chain system as cost minimization to determine the system’s optimal cycle time. In this paper, we determine the optimal cycle time, optimal order quantity and optimal payment time. Finally numerical examples are given to illustrate the result and the managerial insights are also obtained.