In this research, we conducted a pre-post analysis. We analysed the impact of Turkey's transition to a presidential system by comparing economic and governance indicators for the pre-reform period (before 2018) and the post-reform period (2018 onwards). The analysis is based on annual data from 1996 to 2023 and focusses on key macroeconomic indicators like GDP growth, inflation, unemployment, and foreign direct investment inflows, as well as governance metrics like corruption, political stability, and government effectiveness.