The interest for funds that are considered sustainable have increased globally in recent times. This has contributed to corporations on the financial market having to adapt themselves to economical, environmental and social aspects. Environmental, social and governance (ESG) is a way for equity funds to implement sustainability aspects in their management. Previous research in this area have obtained different results regarding how sustainable funds perform in contrast to conventional funds. Since there is not any research in this area regarding the swedish market who also includes the impact of management fees, we decided to investigate the differences in performance and how management fees affects the risk adjusted return. This study investigates 42 equity funds between the time period of 2015-01-01 - 2019-12-31,  sustainable funds are identified from Swesifs sustainability profile and Morningstar's sustainability rating. The scientist in this study have calculated Sharpe ratio, Jensen's measure and Treynor performance measure to estimate performance of sustainable and conventional funds. Furthemore, a correlation analysis has been conducted to identify the extent to which management fees affect the risk-adjusted return. The results show us a difference in performance on a 10 percent significance level, since sustainable funds performance is inferior to conventional funds. In addition, a positive but weak linear relationship is identified in the correlation analysis.