There has been moderately scarce literature on the relationship between company social responsibility (CSR) and the cost of capital (COC) in Nigeria. Numerous studies have analysed the association between the CSR of the companies quoted within the Nigeria Stock Exchange (NSE) relating to their overall performance neglecting the COC component. This study examined the long-run relationship between CSR dimensions (Corporate social performance (CSP), environmental performance (ENP) and corporate governance (CGP) dimensions and cost of debt (COC). It seeks to investigate if CSR has, in the long run, reduce the cost of capital. Annual panel data of 96 companies for the duration; 2005-2020 quoted in the NSE were selected judgmentally. Thomson Reuther Index (TRI) was used as a measure of CSR, whilst the cost of equity (COE) and cost of debt (COD) were used as a measure of COC. Panel ARDL model was adopted to analyse the long-run relationship between CSR and COC. Findings revealed that companies that spend on CSR have a better chance of accessing capital at a reduced cost. The results support the findings of scholars works, especially in the developed countries. In conclusion, companies that spend on CSR have a better chance of accessing capital at a better and low cost. Based totally on the findings, the researcher advocates an on-stop investment on issues that concerns CSR as this may, if consistent, ease the getting of funds at a reduced cost in the long run.