This study investigates the determinants influencing the adoption of International Financial Reporting Standards and its impact on the quality of financial reporting among foreign direct investment enterprises in Hai Phong City. Based on a quantitative approach using the structural equation modeling technique with 423 valid responses, the research model incorporates four factors, including perceived benefits, perceived ease of implementation, legal requirements, and government policy. The findings show that all factors significantly enhance the adoption of International Financial Reporting Standards, with institutional drivers-legal requirements and government policy-exerting the strongest effects. The adoption of International Financial Reporting Standards substantially improves financial reporting quality through increased relevance, accuracy, timeliness, understandability, and comparability of information. The study contributes empirical evidence on the role of institutional support and organizational capacity in shaping reporting outcomes. It also proposes practical implications for policymakers, enterprises, and professional organizations to strengthen the implementation of international reporting standards in the Vietnamese context..