This research aims to analyze the relationship between tax revenues and the performance of the general index of the financial market in Iraq (ISX60) using simple linear regression model, univariate variance decomposition analysis and correlation between the two research variables. The current research relied on monthly data for the period (2005-2023). The results showed a weak direct relationship between tax revenues and the performance of the general index of the market, the research suggested that this relationship needs to enhance the confidence of individual investors and companies to increase awareness of the importance of tax revenues if these revenues are used more efficiently, but the economic and political challenges may reduce this positive impact, which is much needed by the Iraqi labor market at this time. The financial market may also face other challenges, such as the limited availability of financial instruments, poor transparency of financial statements, lack of disclosure of most financial transactions in the market, and the absence of a strong regulatory framework. Based on these findings, the research recommends that tax policy should be strengthened to improve the investment environment, direct tax revenues towards the development of economic infrastructure, and enhance transparency and oversight to increase the efficiency of financial market performance.