Impact of Non-Performing Assets on the Profitability of Public Sector Banks: A Case Study of Punjab National Bank

The empirical evaluation of Punjab National Bank (PNB) from 2018 to 2026 confirms that asset quality is the single most critical determinant of the institution's financial performance. Over the investigated nine-year timeline, the bank underwent a major structural turnaround, transitioning from a severe net loss of ₹12,113.4 crore in 2018 to a resilient, high-volume profit phase stabilizing above ₹18,300 crore by 2026. The statistical data demonstrates that this earnings recovery was directly achieved by clearing toxic legacy debt and optimizing credit risk frameworks. The correlation analysis establishes an incredibly strong, inverse relationship between asset degradation and profitability metrics, yielding coefficients of –0.918 with Return on Assets (ROA) and –0.914 with Return on Equity (ROE). This tight negative correlation proves that any accumulation of non-performing assets acts as an immediate drain on operational earnings, systematically choking off interest income channels while forcing mandatory capital allocations toward provisioning. Furthermore, the regression models validate the overwhelming impact of credit risk, showing that Net NPAs alone explain 84.24% of the variance in ROA (R2= 0.8424) and 83.60% of the variance in ROE (R2= 0.8360). Both models demonstrate high statistical significance (p < 0.001), confirming that asset quality is a dominant, reliable predictor of the bank's fiscal health rather than a product of random market fluctuations. The empirical evidence also reveals that equity returns are exceptionally vulnerable to credit defaults; the Net NPA beta coefficient for ROE is remarkably steep at –3.7569, compared to –0.2257 for ROA. This indicates that while a 1% increase in bad loans reduces asset efficiency marginally, it aggressively erodes shareholder value by 3.76%. Ultimately, the explosive profit growth observed in the 2024–2026 fiscal window mathematically proves that reducing the Net NPA load directly unblocks trapped capital reserves, allowing core banking operations to convert efficiently into sustainable bottom-line revenue.

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