The aim of the article is to investigate the reform experience of the Republic of Poland in the field of budgetary decentralisation and to compare the results of the budgetary decentralisation reform in Ukraine for 2014-2020. The article examines the success of the budget decentralisation reform in Ukraine during 2014-2020, which was based on the experience of the Republic of Poland. The main advantages of the Polish model of fiscal decentralization, the reform of which was implemented in the 1990s, were studied. It was determined that the main sources of revenues of local budgets of the Republic of Poland are their own revenues (local taxes and fees, part of national taxes and the results of economic activity of the commune), general transfers (equalization, education, roads, compensatory transfers) and targeted transfers from the state budget. On the basis of comparison of the structure of revenues of local budgets of the Republic of Poland and Ukraine, it was found that the basis of relative financial independence in the countries under study are direct taxes, the key fiscal role among which belongs to personal income tax, as well as non-tax revenues. The key to the success of fiscal decentralisation in the Republic of Poland was the favourable economic and financial environment. In Ukraine, however, the fiscal decentralisation reform faced significant obstacles in the context of economic recession and the need for fiscal consolidation. Indeed, the reorganization of sources of expenditure and public service financing required changes