This study aimed to investigate the relationship between investment in innovation and sustainability, with tax planning as a mediating variable. Investment in innovation, comprising exploration innovation and exploitative innovation, was linked to business sustainability, which was measured by profit margin, asset turnover, financial leverage, and retention ratio. Data were collected from companies listed on the Stock Exchange of Thailand between 2021 and 2023, sample 493 for data analysis. Multiple regression analysis was employed to test the hypotheses.
The results indicated that exploitative innovation have a positively related to the effective corporate income tax rate (ETR). Investing in innovation does not directly or indirectly have a statistically significant effect on the sustainability of the business.