The Pula Port Authority has the status of a public institution. The founder is the County of Istria. It was established for the purpose of management, maintenance and use of two ports open to public traffic of county importance and eleven ports of local importance. The aim of the research in this thesis is to present the activities of the Pula Port before and after the pandemic COVID - 19 and to present comparative analysis of the activities to determine what financial changes occurred in the businesses and whether these changes affected the stability of the Pula Port. The Pula Port Authority finance primarily comes from revenues, from membership fees and membership contributions, as well as donations from the state budget, the budget of local governments and from EU projects. Before the pandemic caused by the COVID-19 virus the businesses of the Pula Port Authority could be assessed as stable and sustainable. The onset of the pandemic it was expected to have negative effects on the businesses due to the reduction of sea berths, the tickets sale for maritime traffic and the like, but it did not have significant affects.