Between 1957 and 1973, internal security – primarily to counter the threat from Communism was given highest priority by the Thai government. This period also saw the extensive expansion of infrastructure and public utilities to backstop the country’s economic advancement, as well as the bolstering of organizations designed to facilitate industrial development. Financial institutions were also strengthened, initially through the passage of the Commercial Banking.

Business activities in this period, the Bank supported Thailand’s development by expansion of branch offices. Most of the branches were in Bangkok but many were in major provincial centers to served customers throughout Thailand. The bank also aware of the importance of human resources and the admission of new personnel, including social contributions by fostering the growth of buddhism, supporting health.