The article considers the current specifics of accounting for hybrid financial instruments in the process of forming the regulatory capital of commercial banks in Ukraine. The important role of subordinated debt as a component of the bank`s equity capital is determined. The dynamics of changes in the total subordinated debt and the capital adequacy ratio in the banking system of Ukraine in the crisis conditions of the war, which results in instability of financial markets, is studied. The special role of subordinated debt in the process of ensuring the financial stability of commercial banks and increasing their capitalization is noted. The need to enhance the ability of banks to attract hybrid instruments for increasing their regulatory capital is determined.