This study focused on the impact of the policy of realizing published prices of real estate on real estate property taxes and estimated the property tax burden using real estate price announcement data for land, single-family house, and apartment from 2017 to 2020. In addition, the changes in tax burden by year were analyzed and compared by real estate type, price level, and region to discuss the impact of the published price realization policy and suggest policy implications. According to the analysis of changes in the estimated property tax burden, the property tax burden increased significantly after the realization policy, and the gap in the property tax burden by region and price level widened. And the tax burden increased intensively on specific real estate types and high-priced real estate. This suggests that the policy of applying the realization of the published price differently by price range can rather hinder vertical and horizontal equity of taxation among taxpayers.