Thesis (MTech (Business Administration))--Cape Peninsula University of Technology, 2018. / The purpose of this study was to determine the influence of internal controls on sustainability of small and medium enterprises (SMEs) in Harare’s Central Business District (CBD), Zimbabwe. The question at the core of this research is: to what extent do internal controls influence the sustainability of SMEs in Harare’s Central Business District, Zimbabwe. SMEs are perceived to be of paramount importance for the economic affluence of countries the world over, mainly because of their pronounced benefaction and contribution to livelihoods of the dwellers of a country and the gross domestic product (GDP). SMEs have been credited for playing a leading role when it comes to innovation, significant export revenue, custom-suited goods, services provision to society, employment opportunities, and social contribution. This can also be attributed to SMEs operating in Zimbabwe despite the volatility of the Zimbabwean economy. The Zimbabwean business environment, in general, is constantly changing. The changes can be attributed to an eruptive economic environment and unstable political atmosphere. The resultant effect is the departure of larger businesses and investors from the country. Generally, this leaves a great opportunity for SMEs not to be subjected to stiff competition from larger businesses. SMEs are indeed enjoying this space, braving the conditions to start up; however, their operations are short-lived. For SMEs to brave the fortuity of such an unpredictable environment, a system of internal controls must be in place. Research has placed emphasis on internal controls and sustainability of large organisations, while little to no attention has been given to SMEs. The little research on internal controls and sustainability in the context of SMEs has mostly been done in developed countries. Despite this, internal controls and sustainability have not been extensively implemented in the context of developing countries. The need to determine the influence of internal controls on sustainability of SMEs underlines this research. This report adopted a positivist philosophy that entailed utilizing a survey questionnaire to collect data from 150 SMEs operating in Harare’s CBD, Zimbabwe. The sample was further split into Active SMEs and Dormant SMEs (the control group). Data were analysed through Statistical Package for the Social Sciences (SPSS) Version 25 to spawn statistical and descriptive results. To determine reliability of data, Cronbach’s alpha value was employed. The results indicate SMEs are not implementing controls as they ought to and those SMEs that have controls in place do not ensure that they are adhered to effectively and efficiently in order for them to achieve their desired objectives.