Financial structure and current corporate income tax expense: Evidence from Indonesian oil, gas, and coal firms

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Type of the article: Research Article

Abstract
This study aims to examine the relationship between financial structure and current corporate income tax expense among publicly listed oil, gas, and coal companies in Indonesia. Using a quantitative panel-data approach, the study analyzes 28 companies listed on the Indonesia Stock Exchange during 2021–2023, producing a balanced panel of 84 firm-year observations. The analysis focuses on liquidity, solvency, operating costs, and capital intensity, while controlling for firm size, revenue, and profitability. Current corporate income tax expense is measured from audited financial statements and distinguished from effective tax rates, cash tax paid, and government tax revenue. The results demonstrate that operating costs and capital intensity show negative associations in the random-effects model, but these relationships become statistically insignificant in fixed-effects and Mundlak correlated random-effects models. Liquidity and solvency are not statistically significant. The findings therefore indicate specification-sensitive firm-level accounting associations rather than robust within-firm relationships or causal effects. High correlation among monetary variables and the absence of a consistent production-scale measure further require cautious interpretation. The study contributes to understanding corporate tax-accounting outcomes in Indonesia’s extractive sector within a public-finance context.

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    • Figure 1. Study framework
    • Table 1. Data source and sample selection
    • Table 2. Operationalization and measurement of variables
    • Table 3. Panel diagnostic tests
    • Table 4. Robustness checks across panel specifications
    • Table 5. Descriptive results
    • Table 6. Between-firm and within-firm shares of total variation
    • Table 7. Panel model selection tests
    • Table 8. Controlled random-effects estimates
    • Table 9. Fixed-effects and Mundlak CRE estimates
    • Table 10. Mundlak firm-mean coefficients and joint test
    • Table 11. Controlled random-effects model information
    • Table 12. Hypothesis-testing results
    • Conceptualization
      Indra Pahala, Tresno Eka Jaya, Doni Sugianto Sihotang, Rismawati
    • Data curation
      Indra Pahala, Elmier Immanuel
    • Formal Analysis
      Indra Pahala, Tresno Eka Jaya, Elmier Immanuel, Rismawati
    • Investigation
      Indra Pahala, Elmier Immanuel
    • Methodology
      Indra Pahala, Tresno Eka Jaya
    • Project administration
      Indra Pahala, Rismawati
    • Software
      Indra Pahala, Tresno Eka Jaya, Elmier Immanuel, Doni Sugianto Sihotang, Rismawati
    • Supervision
      Indra Pahala, Tresno Eka Jaya, Doni Sugianto Sihotang, Rismawati
    • Validation
      Indra Pahala
    • Visualization
      Indra Pahala, Doni Sugianto Sihotang
    • Writing – original draft
      Indra Pahala, Elmier Immanuel
    • Writing – review & editing
      Indra Pahala, Tresno Eka Jaya, Elmier Immanuel, Doni Sugianto Sihotang, Rismawati