The article is devoted to the study of blockchain technology in the financial sphere of Ukraine, as well as accounting and audit of their application in domestic and international practice. The article contains data on the prospects of blockchain development in the world and in Ukraine, as well as information on the peculiarities of the use of such technologies in the perspective areas – accounting and audit. The article argues that the development of blockchain technology will enable the transition to more modern methods and techniques, which in turn will allow to modernize the accounting and auditing system. The principle of triple entry as a major component of blockchain technology in accounting is emphasized. One of the most promising areas of application of blockchain is accounting for accounts payable and receivable, tax accrual and payment, record keeping and documentation. The article highlights the advantages and disadvantages of using blockchain technology in the financial sphere of Ukraine.