With the digital transformation, the market structure of the telecommunications market changes rapidly, and whether the current level of household telecommunications costs is appropriate is controversial in the process of implementing telecommunications policies. In the midst of this, as the arguments for each stakeholder on the components and levels of appropriate household communication costs differ, it is intensifying into social confrontation rather than rational problem solving. As the controversy over objective household communication costs grows, the need to quantitatively analyze household communication costs based on state-approved statistics is being emphasized. Therefore, this study aims to explore policy implications for reasonable household communication costs estimation by analyzing household communication costs in detail and accurately interpreting their meaning with state-approved statistical data published by the National Statistical Office. In response to changes in the digital environment, we plan to redefine the UN's COICOP system, which takes into account the increase in spending on platforms, content, and digital devices, in the calculation method of household communication expenses to suit Korea. In addition, in order to correct that existing household communication costs do not reflect the contents of device content, this study suggests the necessity of switching to the concept of “household digital cost” instead of “household communication cost” and estimates reasonable “household digital cost”.