For my final thesis, I chose the topic “Startup Costing and Financing Process” because it is a very interesting topic through which the whole process of setting up a startup company can be explained, as well as its development phase and financing methods. I will also explain the process of creating a business plan and the organizational process required to launch it. By analyzing existing corporations that started out as startups, we will look at the types of startups and how they have started to develop and expand globally. With financial analysis or financial design, we will determine the basic costs for starting such an enterprise and explain the role of supporting institutions such as funds, government grants, business angels, business incubators and accelerators. At the end of the paper, I will synthesize all the data that I have collected through surveys of various groups of respondents from the Republic of Croatia on general awareness of the topic of startup companies and the costs and resources needed to start a startup company. The aim of this final paper is to try to clarify and approximate the concept of startups to all readers, so that the culture of startups is even more appropriated and developed in middledeveloped countries such as the Republic of Croatia. Knowledge is always an additional impetus to creating something new and creating ideas and solutions related to the sustainable development of our environment. Willingness to change, awareness and motivation are the first steps towards this.