This paper examines whether participative budgeting influences performance, and if so, whether the effect is mediated by perceived justice and goal commitment. The research setting of this study is a public organization, i.e. law institution, in Indonesia. Prior study (Wentzel 2002) had examined this model in a hospital in the United States. Our study finds that: (1) participative budgeting positively influences managerial performance; (2) the influence is partially mediated by procedural justice and goal commitment.