This research targets enterprises which receive various services from accounting firms, what importance is placed upon these provided services, and whether different levels of importance will produce different levels of service quality. This research uses service items provided by accounting firms to establish a questionnaire and conduct a survey with small and medium sized enterprises located in the Tainan and Kaohsiung areas of Taiwan. The research aims to test the importance placed by small and medium sized enterprises located in these areas on services and quality provided by accounting firms. Based upon collected data, the research analyzes the importance placed upon high quality service-i. e. items receiving much concern should, reasonably, result in higher service quality. Survey results indicate that importance does not necessarily lead to higher service quality. In other words, a gap exists between expectations of service items by small and medium sized enterprises and their accounting firms. Considerable room can been seen for improvement of service, despite the expectation of quality.