Credit to private sector is considered vital for the stimulation of domestic investment, job creation, economic growth, and general improvement in the standard of living of the people. This is because the economic activity in the private sector significantly complements governments’ efforts in attaining macroeconomic objectives, globally. However, as laudable as the benefits of credit to private sector has been in catalyzing private sector performance in developed economies, the situation in most transitioning economies, particularly, Nigeria has been far from satisfying. Several studies in academic literature have identified political instability, poor institutional framework, absence of fiscal transparency, macroeconomic factors and frequent policy changes as having significant constraining influences on credit availability in Nigeria with plausible recommendations to private sector performance. However, the absence of noticeable improvement over the years, and its accompanying growth-retarding multiplier effects on domestic investment and productivity in Nigeria has instigated more concentrated studies on the direct impact of monetary policy framework in the determination of the performance of private sector through credit availability. Therefore, this study empirically evaluates the impact of key monetary policy toolkits on the availability of private sector credits and performance in Nigeria. To this end, annual time series secondary data from 1993 to 2023 were sourced from National Bureau of Statistics and Central Bank of Nigeria Statistical Bulletins for various years within the study period. The study adopts Autoregressive Distributed Lag (ARDL) estimation technique after carrying out pre-diagnostic tests such as ADF unit root test and Bound Cointegration test. Our result reveals that money aggregates (MAG) is positive and significant in explaining variations in private sector credit and performance. Further results reveal that monetary policy rate (MPR), open market operations (OMO) and inflation rate (INR) impacted negatively on the performance of private sector in Nigeria within the study period. Therefore, the study concludes that the performance of the private sector in Nigeria will improve with increased credit availability, which is positively influenced by systematic increase in money aggregates and efficiently expanded monetary policy framework. The study recommends adoption of a harmonious blend of a more relaxed monetary policy framework with purposeful compliant-based regulation that will free up liquidity for increased private sector credits and performance. Keywords: Credit to Private Sector, Monetary Policy Rate, Open Market Operations and Money Aggregates.