In the current context of the transition from a classical society to a society based on a smart and sustainable economy, the integration of the needs of communities at economic, social and environmental level into complex projects is a constant concern. The implementation of complex projects in terms of volume and structure can no longer be covered at the individual level only by the institutions that require public-private partnerships, so it is practically necessary to achieve combinations between the different alternatives available.The objective of this research is to evaluate the opportunity of financing through public-private partnership of public investment projects, highlighting the advantages and disadvantages associated.In this paper we used the qualitative research method based on the analysis of articles in the literature and we highlighted the context of developing this source of funding and the relationships and responsibilities that can ensure good management between different categories of partners.The results obtained from the study of the specialized literature proved that the investments made in PPP can be extremely useful and efficient tools for the sustainable development of communities, but in Romania they are insufficiently exploited compared to the classic investments financed from local and central budgets.This topic has a high degree of novelty for Romania, where the institutions are still reluctant to identify and select a private partner, which indicates a lack of involvement.