The Author has chosen a relevant topic that addresses a number of current and significance concerns in financial performance in commercial banks issues worthy considering in the policy and academic arenas. The author argued that the financial performance by assessing the CAMEL in Tanzania is a great challenge to the commercial banks and hence decrease economic growth. Therefore, the study examined the influence of CAMEL ratios on credit rating evaluation of Tanzanian Commercial Banks as an attempt of contributing contextual insights and knowledge to the literature on key issues increasing financial performance in commercial banks. The author discusses and written the conclusions and recommendations based of the findings of the study.