Generally, ICT have improved the quality of professional services in the accounting organization. The study have achieved the level of accounting information systems usage, and the perceptions of TAM factors such perceived ease of use, perceived usefulness, attitudes towards use, and behaviors intention were determine. The usage of AIS performance of organization factors and social factors was also used to determined computerized accounting information systems in different financial institutions in South Africa. To attain this objective, a total of 104 were participated by survey questionnaires, usage of accounting information systems were majorities’ staffs mainly. Hypothesis was tested; using paired sampled T-test and multiple regression analysis. Authors have found that all four TAM factors have significant influence in using computerized Accounting Information Systems in South Africa context.