The primary issue of this study is the inadequate comprehension and optimal implementation of digital payment technology, digital marketing, and access to Islamic financing by halal food business actors in Indonesia. This impedes the expansion of sustainable halal food enterprises in developing countries, where technology and Islamic finance factors can significantly enhance the halal food industry's efficiency, market expansion, and sustainable competitiveness. The objective of the study is to enhance the current body of literature regarding the correlation between payment technology, digital marketing, and access to Islamic financing, with a specific emphasis on the expansion of sustainable halal food enterprises in developing nations, particularly Indonesia. SmartPLS 4.0 statistical software is employed in this quantitative investigation. Primary data was collected by selecting a sample of respondents, specifically halal food business actors in Indonesia, using a purposive sampling approach. In total, 250 samples were employed in this investigation. The Likert Scale was employed to evaluate the indications, and data were collected using Google Forms. The study's findings indicate that the development of sustainable halal food enterprises in developing countries in Indonesia is influenced by payment technology, digital marketing, and access to Islamic financing.