Nowadays, Money transfer through mobile phone, referred to as a Mobile Money Transfer (MMT) has gained popularity worldwide. Currently, most of the businesses are accepting MMT to enhance their performances. With time, the number of users of MMT is increasing rapidly in South Sudan. Still, it was not clear how the usages of MMT influences the performance of enterprises. Our study aims to determine how the usage of mobile money can convey economic improvement in South Sudan. Furthermore, as the leading business center in the country, our study area was the Juba city and we considered the biggest five market areas namely Konynonyo, Juba, Custom, Jebel, and Militia. Through the survey questionnaire, we collected data from small and medium enterprises, and collected data were analyzed to measure the relationship among usage of MMT, business performance, and economic improvement. Our findings showed that MMT has a great impact on both business performance and economic improvement.