Objective: The purpose of this study is to investigate the effects of Tax Competition for Turkey, as well as the aspects of basic taxes like Personal Income Tax and Corporation Tax and evaluate the results. In this context, the impact of foreign direct investments on economic growth in Turkey is investigated. Theoretical Framework: Theoretically, it is accepted that foreign direct investment will positively affect economic growth. This study investigates the practical implications of this theory for Turkey. Method: International Comparative Analysis and various tables and graphics were used in this study to analyse the variance of Personal Income Tax and Corporation Tax by years. In addition study applies regression analysis on direct foreign inflow and economic growth in Turkey for 1974-2019 period. Results and Discussion: Regression analysis was performed on the time series of foreign capital investments and economic growth. However, it is concluded that foreign capital investments do not positively affect economic growth over the 1974-2019 period since foreign capital investments in Turkey reached their usual level only after 2002. Research Implications: This study concludes that foreign direct investment (FDI) does not always positively affect economic growth for all countries. Originality/Value: The study is original in that it shows that a generally accepted theory may have different results in practice for some countries.