According to the progress of national informatization throughout the world, infringement andthreaten of privacy are happening in a variety of fields, so government is providing informationsecurity policy. In particular, South Korea has enhanced personal impact assessment based on the law of personalinformation protection law(2011). But it is not enough to effect the necessary cost calculation standards andchangeable factors to effect PIA. That is, the budgets for PIA was calculated lower than the basic budgetsuggested by Ministry of Government Administration Home affairs(2011). Therefore, this study reviewed the costcalculation basis based on the literature review, cost basis of similar systems, and reports of PIA and obtained tothe standard with Delphi analysis. As a result, the standards of PIA is consisted to the primary labors and isutilized to how the weights by division of target system, construction and operating costs of target system, typeof target systems, etc. Thus, the results of this study tried to contribute to ensure the reliability of PIA as well asthe transparency of the budget for privacy in public sector.