In the dynamic landscape of Southeast Asia's digital economy, Malaysia is gearing up for a transformative shift with the mandatory rollout of electronic invoicing (e-Invoicing) beginning June 2024. Recognizing the critical need for a structured approach to this transition, this study presents the design and evaluation of an Adaptive E-Invoicing Rollout (AER) Framework, which is aimed at facilitating a successful e-Invoicing implementation across Malaysia's diverse business sectors. The framework is developed through a qualitative methodology that synthesizes insights from an extensive literature review, expert interviews, case studies, and the Delphi technique. The AER Framework stands out for its comprehensive approach, incorporating a theoretical predictive model that assesses various variables influencing e-Invoicing success. By employing the correlation coefficient, the model quantifies the relationships between key variables, providing a structured mechanism to predict and enhance the successful adoption of e-Invoicing. This model is particularly designed to be adaptable and dynamic, evolving with ongoing insights and changes in the e-Invoicing landscape. The study's findings offer a significant contribution to the digital economic literature and practice, providing policymakers, businesses, and stakeholders with a robust tool for strategic planning and effective decision-making. As Malaysia navigates its digital transformation, the AER Framework serves as a critical guide, ensuring that the e-Invoicing rollout is not only compliant with regulations but also conducive to enhancing fiscal transparency, economic efficiency, and business operations. Furthermore, the framework's adaptability and predictive nature make it a relevant model for other countries considering similar digital transitions, marking it as an asset in the broader context of digital finance evolution.