The competitive business environment has forced companies to compete by providing real-time accounting data in the strategic decision-making process. Enterprise Resource Planning (ERP) is a solution that can be applied to help the company offers real-time accounting information through the integrated accounting process. This study aims to examine the underlying reasons and the impacts of the ERP implementation on accounting processes in manufacturing companies. This research is an exploratory study using a mixed-method approach via questionnaires, observations, and depth interviews with the ERP users in two large-scale manufacturing enterprises in Surabaya. The result indicates that the impact realized after the ERP systems went live related to the main reasons for ERP implementation. But this study fails to provide evidence that ERP implementation brings new accounting methods and practices. The reasons for this phenomenon will be discussed in-depth in this paper. This research is expected to contribute to the realm of accounting information systems that the implementation of an information system should be aligned with the needs and the company's business strategy.