This research was conducted to analyze whethet there were differences in the financial performance of conventional BUKU IV banks before and after the Covid-19 pandemic based on capital ratios (Capital Adequacy Ratio), earning asset quality ratios (Net Performing Loans), profitability ratios (Return on Assets), efficiency ratios (Operating Costs and Operating Income), and liquidity ratio (Loan to Deposite Ratio). Because it uses saturated sampling, the objects that make up the study popuation are all of the four BUKU IV banks, including BCA, BNI, BRI, Mandiri. The results of the study show that (1) there is no difference in performance in BUKU IV conventional banking before and after the covid-19 pandemic based on CAR, (2) there is a performance difference in BUKU IV conventional banking before and after the covid-19 pandemic based on NPL, ROA, BOPO, LDR