This study adds new insights to the academic debate on the effectiveness of both accrual-basis systems and the adoption of harmonised accounting rules at the international level by considering an additional perspective: their effect on corruption. This study investigates a sample of 33 Organisation for Economic Co-operation and Development countries for the period 2010–2014, creating a panel data set that allows the taking of an international comparative approach. The results indicate that corruption is reduced as governments advance in public-sector accounting reforms, adopting International Public Sector Accounting Standards, or implementing accrual-basis systems.