Although the citizens’ perceived satisfaction with public service is a cornerstone to public management, service users’ attitudes toward service budget in the public sector is poorly understood. The purpose of this study attempts to examine the effect of frequent usage of public services on citizens’ attitudes toward service budget by using confirmatory factor analysis. This study used the 2003 citizen survey of San Francisco and utilized the Muni transit system as a case. We found that citizens’ perceived service satisfaction is not directly related to their intention of supporting service budget, and the interaction between the frequency of service usage and perceived service satisfaction brings a positive influence on public service users’ attitudes toward selected budget. Key Words: Service Performance, Citizen Satisfaction, Budget Attitude, Public Service Consumer.