Öz
One of the reflections of the change and transformation in the understanding of public financial management is the effective and efficient implementation of budget
decisions. This situation has led to the increasing importance of budget transparency and accountability regarding the implementation results of the budget. In this context, efforts to strengthen the oversight of the legislature over the budget and its function in ensuring budget transparency are increasing all over the world. The study aims to investigate the impact of the legislative budget oversight during the preparation, implementation and post-implementation processes of the budget on budget transparency. The sample of the study, which was conducted using the Open Budget Survey data of the International Budget Partnership published in 2012, 2015, 2017, and 2019, includes 64 developing countries whose data for these years can be fully accessible. In the analysis, the budget transparency index was used a dependent variable. Data on the legislative budget oversight, level of democracy, GDP per capita, government effectiveness and political fractionalization were used as independent variables. As a result of the analysis using cross-section and panel data analysis, strong relationship was found between the legislature’s budget oversight and budget transparency, and this relationship continued consistently during the periods examined