Tax holiday is one of the tax incentives provided by the government in attracting foreign investors. Although it is not the main factor that drives investment, the tax holiday is still the main choice. However, this creates a harmful tax competition issue in a regional. The purpose of this study was to determine policy implementation in Indonesia and Malaysia and to analyze the harmful tax practices in the both countries concerned. The study used a qualitative approach with in-depth interviews and literature studies. The results of this study indicate that both countries have the potential for harmful tax practices but have no potential for serious tax evasion. Both of countries still have sovereignty over tax policy by carrying out tax coordination with others countries in the same region.
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