Tax Reforms for Growing Firms? Evidence from corporate tax filing data in Japan

Using tax filing data of Japanese business enterprises from 2014 to 2020, we investigate how the 2015-2018 tax reforms in Japan affected the average tax burden and whether the reforms benefited growing firms or not. We first calculate backward-looking effective tax rates (ETRs) and then estimate the sensitivity of the ETR and its components with respect to firm sales growth, R&D intensity, and other characteristics. Our findings are as follows. First, the average ETR increased after the reform. Second, compared with the average ETR, ETRs for growing and R&D-intensive firms initially decreased, but then began to increase. The reforms did not benefit growing firms in the long run due to the expansion of tax bases.