The effects of the foreign direct investment (FDI) on economic growth, both in developed and non-developed countries, have been investigated for decades. In Kosovo's new economy, the FDI's presence is essential for economic and social development. This study aims to examine the impact of FDI by economic activities, known as "high-level aggregation," on the gross domestic product (GDP) growth for the period 2010-2019. The multiple regression is used to analyze the strength and direction of the FDI's impact on the GDP. The results show that FDI in the activities belonging to the primary sector has negatively impacted the GDP. In contrast, the FDI in activities of the secondary sector indicates a positive impact. Concerning the tertiary sector, the result differs among the types of activities. The FDI in real estate, renting, and business activities have a positive impact on GDP. Also, the FDI in public administration, education, human health, and social work activities has a substantial impact on GDP growth. The other FDIs belonging to the tertiary sector showed adverse impacts. So, the findings suggest that in a new economy, the FDI in activities that are more apt to induce positive externalities has more potential to increase the GDP in the long run. Otherwise, the impact may be low or adverse.