It is generally accepted that growth should be knowledge-based, sustainable and inclusive. Due to their direct and indirect impact on growth, as well as the fact that infrastructure sectors are often referred to as the cornerstones of the development of national economies, special attention is drawn to infrastructure investments and the ways of their financing. They are considered as very complex issues of investment and financing, which can be addressed from both macroeconomic and microeconomic perspective. The reason for that is a different understanding of the sustainability of growth and different methods of measuring growth. From the macroeconomic standpoint, growth is primarily associated with the growth of gross domestic product and creation of long-term competitiveness of national economies, without recourse to external borrowing. Besides, growth has its social and environmental dimensions. Some authors point out that this concept of growth is rather 'soft' and inadequate from the perspective of companies. Namely, the presence of economic growth does not automatically mean that it will be transformed into profitable and sustainable growth at the level of individual companies, infrastructure sectors and the economy as a whole. Of course, there are several reasons for that, from low efficiency, through poor quality of corporate governance and inadequate financing, to inadequate prices. Moreover, the sustainability of the company's growth is assessed based on the quality of the capital structure and the ability to create value. Financing of infrastructure projects involves complex processes, such as provision of capital, diversification of sources of financing and their adequate combination, which also have their macro and micro aspects. However, it does not just relate to the problem of providing capital. It always also implies a question of giving priority to particular sources of financing. The possibilities of financing infrastructure projects from the budget are limited, while government-backed credit sources have their own price and can also put pressure on the budget. Also, credit sources may cause different forms of dependency. The problem appears even more obvious at the level of individual companies. External sources of financing are necessary, but their availability also depends on borrowing capacity, which is, among other things, determined by the ability to generate internal sources. Furthermore, it is assumed that there is enough capacity for achieving expected returns in order to attract the interest of private investors in this type of investment. The foregoing and similar issues, seen through the prism of the financial position of infrastructure sectors, have been brought up and partially analyzed in this paper.