When commercial banks increase the diversification of non-credit activities, it often leads to increased costs but at the same time, it will also increase non-interest income. Otherwise, diversification will cause risks for banks. The study examines the relationship between benefits and risks from diversification activities and approaches using the GMM method on the PVAR model with panel data including 840 observations collected from 21 commercial banks during the above period (2011- 2021). At a lag 1 granger causality test at the 1% significance level, the results provide provides additional statistical evidence that shows two pictures of bank performance with the first picture, the higher the return on assets (ROA) banks, the higher the income from diversification and vice versa. In the second picture, banks with a higher return on equity (ROE) are at risk of reducing non-interest income from diversification activities and vice versa. The study did not find any adverse effects from diversification on bank performance. IRF analyzes show that the impact of “shocks” from diversification to ROA and ROE is powerful and gradually decreases during the four periods, then fades over time.