In the conditions of martial law, the issues of ensuring the preservation of the national economy and further economic development are becoming relevant. An important condition for this is an efficient mechanism for the formation and implementation of the state budget. The budget formation mechanism is an important tool for ensuring sustainable economic development of the country while maintaining the stability of the budget system. The aim of the article is to determine the peculiarities of budgeting in the conditions of martial law. The research presented in the article is based on the hypothesis of the need to strengthen the financial potential of budgets of all levels at the expense of their revenues. Strengthening the income part will contribute to achieving economic stability and balance and determine the pace of social and economic development. The research methodology is based on general scientific and special methods. The main research methods are dialectical and institutional. Structural, comparative, method of scientific abstraction, analysis and expert evaluations were also used. Adaptation of the budget formation system to social and economic changes and determination of priority directions for the further development of financial and budgetary relations require attention. For the thoroughness of the study, the structure of the revenue part of the state budget was analyzed during 2019–2023. The dynamics of attracting international financial aid and its share in the state budget were evaluated. In the course of the research, modern adaptation and transformation mechanisms implemented in budget policy under martial law conditions were determined. New approaches to the formation of the revenue part of the budget have been studied. On the basis of the conducted research, promising directions for improving the formation of state budget revenues have been determined, which will allow the budget system to function more effectively and efficiently. It is expedient to further improve the system of budget formation in terms of creating and implementing effective financial mechanisms of budget policy, with the aim of further social and economic development of the country. To increase the effectiveness of budget policy in the conditions of martial law, it is necessary to strengthen the use of the principles of stability, financial and economic soundness, social justice, and budget balance in the budget process