This master's thesis deals with the topic of granting concessions for hydrocarbon exploitation. An analysis of concession laws was made. In a real sense, a concession is a license to carry out certain activities of conditional approval. The analysis deals with the procedures for issuing concessions on the maritime domain as well as other restrictions and conditions that are regulated by the laws on concessions. Through concessions, they created additional revenues for the state budget, as well as local and regional self-government units. Since this master's thesis analyzes hydrocarbons exploitation in addition to the Concessions Act, it has analyzed two other laws that directly regulate the exploitation of natural resources, namely the Hydrocarbon Exploration and Exploitation Act and the Mining Act. Through the work itself, which is based on the exploitation of hydrocarbons, the hydrocarbons themselves were processed and exploited from the sea. Hydrocarbon exploitation is the process of extracting hydrocarbons from a reservoir and refining hydrocarbons, transporting them by pipeline and processing. All these actions carry out concessional justice for the development and exploitation granted to investors. Considering that any concession of the maritime domain, and especially concession in the exploitation of hydrocarbons in the public, raises fears of work pollution due to the investigation and impact of hydrocarbon exploitation on the environment and tourism which is one of the main revenues in the Republic of Croatia.