Foreign Direct Investment (FDI) is one of the factors that can influence the growth and development of the economy of a country, but on the other hand, it could have a negative effect if not regulated properly by the host country. States must ensure that FDI is properly regulated in the best interests of the country and the foreign investor itself. South Africa has reviewed its foreign investment legal framework and during this process, it terminated most of its bilateral investment treaties that previously regulated foreign investment in the country. In turn, it introduced the Protection of Protection of Investment Act that regulates both domestic and foreign investment. This study analyses the way in which national and international investment law affect FDI inflow and the economy of South Africa. The study also deals with the determinants of foreign investment in the host country and the extent to which they have an influence on the inflow of FDI. / Public, Constitutional and International Law / LL. M.