The study aimed at external auditing and the financial performance of Ssubiryo micro finance, kampala and it was guided by the following objectives; To determine the effect of verification of accounting data and financial performance of organization in Kisubi, to determine whether or not external auditors exercise professional ethics and competences while auditing organizations in Kisubi and to ascertain the effect of internal control on the performance of organizations in Kisubi. The descriptive design was adopted, which aimed at examining the impact of external auditing on the financial performance of organizations in Uganda. A descriptive research design was adopted for the study since it focuses on the people as well as their attributes which enable the investigator to understand and examine the influence of external auditing on financial performance. This was achieved using a survey questionnaire, observation schedule, and document analysis. The study population will concentrate on accountants, auditors, Managers and employees in Ssubiryo Micro Finance. From the findings, the responses on the effect of Verification of Accounting data on the performance of organization were, 48% conceded/agreed with a frequency of 83, 35% strongly agreed with a frequency of 61, 10% were uncertain with a frequency of 18, 5% disagreed with a frequency of 9 and 2% strongly disagreed with a frequency of 3 hence stipulating a total frequency of 36 174. There is need for the external auditors to continuously update themselves with the changing times and technologies and sharpen their skills. By applying skills to the most critical points, building personal and professional credibility and recognizing and responding to the needs, external auditors can become indispensable thus speeding good governance and enhancing efficiency of external audit.