The purpose of the article is to investigate and determine the theoretical essence of non-current tangible assets and improve their classification in order to develop accounting science. Research methods. The research uses dialectical methods of cognition of processes and phenomena, analysis and synthesis - to substantiate and determine the theoretical and methodological principles of non-current tangible assets and their classification, monographic method - to analyze the evolution of domestic and foreign scientists on the problems of classification and definition of non-current tangible assets, empirical method is for a comprehensive assessment of the current state of the object of study, scientific abstraction - to summarize the results, draw conclusions and their own vision of the essence of non-current tangible assets and their classification. Research results. As a result of research on the nature and classification of non-current tangible assets revealed a modern approach to their interpretation and classification. The need to improve the existing classification of non-current tangible assets in the public sector of the economy on the example of budgetary institutions is identified. Scientific novelty: Theoretical provisions on the essence of non-current tangible assets, which are based on the experience and research of domestic and foreign scientists, as well as their own vision, have been further developed. An updated classification structure of non-current tangible assets for the public sector is proposed, based on the needs of managers and employees of the public sector of the economy. Practical significance. On the way to bringing the national accounting system to international standards, special attention should be paid to determining the theoretical nature of non-current tangible assets and bringing the classification of these assets to accounting needs not only at the national level but also at the level of international standards and requirements. Proposals for the classification of non-current tangible assets are proposed. Tabl.: 1. Figs.: 4. Refs.: 13.