This study seeks to answer the question of what factors affect lean accounting implementation and its impact on performance in Vietnamese enterprises. The aim of the study is to examine how organizational, management and cultural factors influence the adoption of lean accounting in Vietnam and assess its role in improving operational efficiency. Using a quantitative approach, the study collected data on 332 respondents from 126 enterprises across a variety of industries, mostly manufacturing enterprises (69%) through a structured survey. Statistical techniques, including hypothesis testing with Structural Equation Modelling (PLS-SEM), show that management support, workforce competence, organizational size, and cultural factors have a positive influence on lean accounting adoption. Meanwhile, the study did not find a statistically significant impact of the current accounting system on the application of lean accounting in enterprises in Vietnam. The study also confirms the positive relationship between lean accounting implementation and operational performance, which implies that enterprises can improve their operational efficiency through the implementation and application of lean accounting. In addition, these findings are significant because they provide the first comprehensive empirical evidence from the Vietnamese context, providing valuable insights for both practitioners and researchers. The results suggest that Vietnamese enterprises should prioritize workforce development and support from managers while considering organizational size and cultural factors in their implementation strategies. This study contributes to the understanding of lean accounting implementation in developing economies and provides practical recommendations for successful adoption.