According to the adopted title, the subject of considerations is to indicate the statutory rules regarding the acquisition of financial resources by the countries included in the area of Three Seas Initiative (TSI). Due to the adopted topic, the axiology of the Three Seas Initiative term will be clarified showing the genesis of its origin.More importantly, the article will provide information on the financing principles of projects implemented by the TSI countries. In this regard, issues related to the acquisition of EU funds will be discussed first, and then the possibility of obtaining funds from other alternative sources. The article will be provided with an observation regarding the possibilities and needs of own, dedicated financing of the TSI countries.