International Financial Reporting Standards (IFRS) 's adoption increased attention to International Accounting Standard Regulations worldwide. It has opened the door for empirical analysis having different perceptions of mandatory IFRS adoption. This paper's main objective is to examine the impact of accounting quality and IFRS adoption on Pakistan's banking sector efficiency. We have employed the Malmquist productivity index, Roychowdhury's Earnings Management, and modified learner index to conduct the empirical analysis. The results mean how much banking sector efficiency is affected by accounting quality and IFRS adoption. The results demonstrate that the banking sector efficiency significantly increases through accounting quality and IFRS. Furthermore, it can be seen that the foreign banks' efficiency in Pakistan is less than other banks compared to public or private banks. Additionally, more earnings timeliness has been noted in large banks than medium and small banks in Pakistan. Preferably, the practice of quality accounting relies on disclosed information through financial statements. In contrast, the organizations may evade the losses once the information quality is precise and appropriate. The study provides valuable information to managers and other stakeholders.