Internal Financial Management Practices and Financial Performance of Listed Manufacturing Firms in Nigeria

This study examined the effect of internal financial management practices on the financial performance of listed manufacturing firms in Nigeria. The study was motivated by the persistent fluctuations in the financial performance of manufacturing firms despite their significant contribution to Nigeria’s economic development. Specifically, the study investigated the effect of working capital ratio (WCR), cash conversion cycle (CCC), inventory turnover ratio (ITR), accounts receivable turnover ratio (ARTR), accounts payable turnover ratio (APTR), and debt management ratio (DMR) on return on equity (ROE). The study was anchored on the Trade-Off Theory and Pecking Order Theory, which explain firms’ financing decisions and the efficient IJEFM management of internal financial resources. The study adopted a quantitative ex-post facto research design. The population comprised all 49 manufacturing firms listed on the Nigerian Exchange Group (NGX) as of December 2025, from which twenty firms were purposively selected based on the availability of complete and consistent financial records. Secondary data were obtained from audited annual reports and financial statements covering the period 2016 2025. Data were analyzed using panel least squares regression techniques through E-Views 9.0 software. Preliminary diagnostic tests, including descriptive statistics, correlation analysis, cross-sectional dependence tests, panel unit root tests, Pedroni cointegration tests, Redundant Fixed Effects tests, and Hausman tests, were conducted to ensure the validity and robustness of the estimates. The Hausman test supported the adoption of the random effects model. The findings revealed that the model possessed strong explanatory power with an adjusted R-squared value of 0.7678. The results showed that WCR, ITR, ARTR, and APTR had positive and statistically significant effects on ROE, while CCC and DMR exerted negative and statistically significant effects on ROE. The study concluded that efficient liquidity management, inventory management, receivables management, and payables management enhance financial performance, whereas prolonged operating cycles and excessive debt financing reduce shareholder returns. The study recommended that manufacturing firms maintain optimal working capital levels, improve inventory and receivables management systems, strategically manage trade payables, and adopt prudent debt policies to enhance profitability and financial sustainability. The study contributes to the literature by providing empirical evidence on the combined effect of internal financial management practices on the financial performance of listed manufacturing firms in Nigeria.