Capital adequacy can be done in many ways, such as by owned-self company capital contaied of fee balanced, stock holder’s capital, and both of them. Beside supported by right fullfillment of network capital, in order to develop the company in better ways , the efectivity, efeciency and productiveness will be very influencing the company.The purpose of this research it to knowing the efectivity of capital maintenance, turnover rate of capital networking and economical rentability of PT. Astra Agro Lestari, Tbk. and PT. Perusahaan Perkebunan London Sumatra Indonesia, Tbk. to determine the effect of cost control and turnover rate capital networking to economical rentability of PT PT. Astra Agro Lestari, Tbk. and PT. Perusahaan Perkebunan London Sumatra Indonesia, Tbk.From the result of 12 years analysis, the effectivity of cost control of PT. Astra Agro Lestari, Tbk. produce an average of 33,8% bigger than PT. Perusahaan Perkebunan London Sumatra Indonesia, Tbk. which produce only 30.5%. the working capital turnover of PT. Astra Agro Lestari, Tbk. produce an average of 4.99 times much bigger than PT. Perusahaan Perkebunan London Sumatra Indonesia, Tbk. which only produce an average of 2.87 times. And for the rentability, PT. Astra Agro Lestari, Tbk. produce 23.07% bigger than PT. Perusahaan Perkebunan London Sumatra Indonesia, Tbk. which produce an average of 14.5%. the statistic result by using SPSS Ver.20.0 application, explained that the effectiveness effect of OPM’s cost control and working capital tunover to economical rentability of PT. Astra Agro Lestari, Tbk. and PT. Perusahaan Perkebunan London Sumatra Indonesia, Tbk.For PT. Astra Agro Lestari, Tbk. and PT. Perusahaan Perkebunan London Sumatra Indonesia, Tbk, are advices in order to press the cost of its operatios and selling cost to gain more profits. Beside that, the companies are advices in order to accelerate their networking capital , so that the companies activities can work properly by increasing its selling chart and press selling cost will gain the profits to maximum.Keywords: cost control effectivity, working capital turnover, economical rentability.