This study aims to examine the effect of capital structure measured by the Debt-to-Equity Ratio and solvency measured by the Debt-to-Asset Ratio on profitability measured by Return on Assets in mining sector companies listed on the Indonesia Stock Exchange for the period 2021–2025. This study employs a quantitative associative research design using panel data regression with the Random Effect Model REM selected through the Chow, Hausman, and Lagrange Multiplier tests. The findings reveal that DER has a positive and significant effect on ROA, while DAR has no significant effect on ROA. Simultaneously, both variables significantly affect ROA. These results suggest that optimal use of debt in the capital structure can improve profitability through the tax shield mechanism, while solvency alone does not consistently determine profitability due to the capital-intensive and commodity-price-sensitive nature of the mining industry.
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