Budgetary participation is paramount in organizational management since it has a direct impact on operations efficacy and the organization success. At Timor-Leste, where managerial practices are still being developed, budgetary participation can be crucial to improve organizational performance. This research analyzed how budgetary participation affects employee and management performance focusing on the mediation of work satisfaction and engagement. Based on the Theory of Task Motivation and Incentives and the Theory of Goal Setting and Task Performance (Locke, 1968; Locke & Latham, 1990), how budgetary participation affects performance is studied considering work satisfaction and engagement mediation effects. A quantitative approach was used in this research by conducting surveys that were completed by ninety-three managers from companies associated to Timor-Leste’s Chamber of Commerc...