The budget represents a public management plan, an important landmark of highlighting the degree to which the state is involved in the economy and social life, as well as the way in which it manages to manage them. Therefore, planning a budget realistically is a first step towards good governance. The state social insurance budget represents the totality of revenues, expenses and funding sources intended for the performance of functions and the management of the public social insurance system, so its planning also has specific peculiarities. The planning of the state social insurance budget is carried out based on the forecast of macroeconomic indicators; the limits of interbudgetary transfers; the policy priorities stipulated in the sectoral spending strategy; trends in demographic indicators and other indicators regarding the number of beneficiaries of social benefits; other specific features contained in the circular regarding the development of the state social insurance budget. The purpose of the research is to highlight the peculiarities of the state social insurance budget planning in the Republic of Moldova. The central public authority in the field of social protection is responsible for developing policies in the field of state social insurance and social assistance and presents forecasts and other information necessary for the development of the medium-term budget framework, promotes the draft law on the state social insurance budget, monitors and analyzes its execution, as well as the performance within the programs, puts forward proposals in order to ensure the financial stability of the public social insurance system. The methods applied in the research process are: dynamic analysis, comparison, observation, deduction. The results of the research reflect the planning of the state social insurance budget in the period 2017-2021. Another aspect of the research is the executed/approved analysis of the state social insurance budget and through the prism of the medium-term budgetary framework.