One of the reasons why many developing countries struggle to provide basic public services to citizens is a lack of tax revenue owing to corruption and illicit financial outflow transfers. Trade misinvoicing is one of the main channels taxpayers use to evade taxes and transfer money abroad, particularly in developing countries. Although scholars have been cognizant of the gravity of corruption, little empirical evidence exists on tax evasion through trade, which is mostly related to the decline of tax revenues in developing countries. To bridge this research gap, this study examines the impact of governance quality and adoption of the Open Government Partnership on trade-related tax evasion in developing countries. Governance quality and open government initiatives are expected to reduce tax evasion by increasing moral cost and transparency, improving the legitimacy of tax burden and tax expenditure. The results show that government effectiveness, regulatory quality, control of corruption, and adoption of open government contribute to combating trade-related tax evasion. Moreover, the government's adoption of an open government moderates the association between governance quality (regulatory quality) and trade-related tax evasion; that is, governance quality significantly impacts reducing tax evasion in countries where open government initiatives are more prevalent. This study holds several implications for leveraging the nationwide adoption of open government, which may directly and indirectly help governments reduce trade-related tax fraud and improve tax revenue. Points for practitioners Governance quality and the adoption of open government initiatives effectively reduce trade-related tax evasion. The impact of governance quality on reducing tax evasion can be enforced by adopting open government partnership.