The article examines the theoretical principles of studying sustainability and security of public budget of the Visegrad Group countries and determines that indicators of the normal functioning of the economy and ensuring a decent social standard of living of the population are reaching the limits of relevant indicators, some of which are approved by international standards. At the same time, the authors identified the absence of a single system of macrofinancial indicators of sustainability and security of public budget proposing to create it, including twelve ratios reflecting levels of debt security, deficit load on the economy, debt load on the population, budgetary independence, efficiency, population well-being, productivity, economic efficiency, as well as the effectiveness of financial support for health and education, elasticity of income and expenditure from the change in GDP of the Visegrad countries. Analytical calculations of the above-mentioned macro indicators in the dynamics made it possible to draw qualitative conclusions on compliance with the sustainability and security of public budget of the Visegrad Group countries, identify possible threats to national economies and prevent the consequences in case of non-compliance with standards. Based on the results of correlation-regression analysis, the authors determined the indicators that have the greatest impact on the resultant factor-the ratio of the level of deficit load on the economy of the investigated countries. It made it possible to analyze the real situation in the economy, to determine the level of sustainability and security of public budget and to give the necessary suggestions and recommendations.