The strategies of performance audit topics selection, applied by National Audit Office of Lithuania and the Netherlands Court of Audit were analysed in this master thesis together with objects and purposes, assessment criteria and applicable research methods within already concluded performance audits. These two institutions and practices were compared with each other and based on experts’ insights areas for improvement were identified. Theoretical assumptions of performance audit - origin of performance audit’s concept, types and possible impact is analysed within the first chapter. The second chapter contains analysis on assumptions of institutional performance audit, also provides an overview on the international organizations analysing performance audit, their activities and objectives; mandates and legal basis of the National Audit Office of Lithuanian and the Netherlands Court of Audit are scrutinized. The fourth chapter contain analyses and assessment of the findings of an empirical study. Later, conclusions and recommendations are produced.