An Analysis of the Role of the Operating Budget in Improving Cost Efficiency and Promoting Business Sustainability Strategies at UD X

This study aims to examine how the operational cost budget plays a role in increasing expenditure efficiency while supporting sustainability strategies at UD X, an engineering equipment trading company located in Surabaya. Using a qualitative approach through a case study method, data were obtained from interviews, direct observation, and document review, then analyzed using the Miles and Huberman interactive model accompanied by triangulation techniques. The research findings show that the budget functions as a primary control instrument through limiting operational costs to revenue levels, analyzing cost-realization differences, and as a benchmark for efficiency in every part of the business. Discipline in cost management has been proven to maintain financial stability and support business sustainability from economic, social, and environmental aspects.