The major problem of the current financial system of Ukraine is the critical condition of public debt. Its formation was unsystematic with operational financing of current budget expenditures that influenced its structure and dynamics. Ensuring the stability of the financial system and keeping the debt burden within safe limits, or at least ensuring its permanence, are Ukraine's debt policy's primary tasks. Simultaneously, the system of debt security indicators is an instrument for assessing the country's financial system's ability to meet its debt obligations. The article provides a list of key indicators of debt security, compares their limits in Ukraine and in world practice.

This study is aimed to outline the scientific and methodological approach to determining the state debt security condition. It was developed on the basis of a quantitative assessment of relevant indicators, their further grouping, which allows analyzing the potential threats and sources of instability, predicting their future dynamics, and calculating the integrated debt security index of Ukraine.

The main idea of the methodology for assessing the integrated debt security index is to evaluate the country`s debt security level in a certain period as a single summary indicator. Indeed, all threats and destabilizing factors measured by some debt security indicators might be taken into special consideration. However, their cumulative impact provides an overall result and allows assessing the overall debt security level. The analysis of the calculated integrated debt security index will allow timely react to potential threats and neutralize the risks caused by an excessive debt burden.

Methods for rationing debt security indicators have been reviewed, taking into account the advantages and disadvantages of each of these methods – the optimal one has been chosen.

The study covers the period from 2009 to 2019. The analysis of the debt security dynamics and the integrated index let on concluding that the debt situation in Ukraine is unstable, and there is a significant increase in debt over the past 11 years. Unsatisfactory values of both individual debt security indicators and the integrated index indicate the need for serious attention of public authorities and the need to optimize the management of Ukraine’s debt security in the system of economic security.