National Public Procurement Agency (NPPA) is one of Indonesian Government Agency which uses website as their service to citizen to share information related with regulation, organizations profile, and function. Information quality (IQ) in government website has becomes one of key determinant to user satisfaction. Therefore in this study, we aim to investigate which IQ characteristics that users find important, affect user’s satisfaction, and should be prioritized to optimized user’s satisfaction. In this study, we use Importance Performance Analysis (IPA) quadrant to find prioritized IQ characteristics then we do theory analysis to find it’s relation to user overall satisfaction. The result shows that most important IQ characteristics are believability, reliability, and validity of information. This study also finds that comprehensiveness, currency, flexibility, and value added in information should be prioritized to be improved. Furthermore, believability of information, reliability of information, information accuracy, validity of information, robustness of information, amount of uptime information, credible source of information, perceived value of information, type of language used is interpretable, essentialness of information, efficiency of information, information has added value which significantly and positively contribute to user overall satisfaction. This paper raises idea to do further research in IQ characteristics for e-government.