We explore the association between related-party transactions and the efficiency of Taiwanese electronics companies following the adoption of International Financial Reporting Standards (IFRS) for the period 2010-2018. Tests of differences in mean showed that the efficiency and related-party transactions of the sample companies were significantly lower in the post-IFRS era. Regression results indicated that related-party transactions have significantly positive effects on efficiency; however, this positive association turned out to be smaller following the adoption of IFRS in Taiwan. Overall, this study suggests that changing accounting policy and rules can significantly affect related-party transactions in companies, and ultimately corporate performance.