ali talaiezadeh

Since tax constitutes a major part of the government's income and is the most common and most important method of providing government spending to ensure social welfare and economic growth, therefore regardless of taxes and important factors in avoiding paying taxes, economic growth and increasing public welfare in the long term It is not possible. Therefore, the main purpose of the research is to examine the relationship between the effective tax rate and the risk of companies listed in the Tehran Stock Exchange, emphasizing the components of tax culture. The data of this research includes the financial information of listed companies from the beginning of 2007 to the end of 2016. In this research, the panel data model was used to check the hypotheses. The results showed that there is a significant and direct relationship between the lower effective tax rate and sub-indices of tax culture (tax laws, crimes and forgiveness, awareness, social justice), with future tax rate fluctuations and future stock price fluctuations. Therefore, it is necessary to use the funds from tax avoidance activities in the field of investment to increase the expected future cash flow and as a result reduce the cost of capital.

Promoting tax culture is a significant challenge in the tax system. In Iran's tax system, based on self-reported tax liability, voluntary tax payment is low because the tax system is inefficient. Thus, it is very important for Iranian policymakers, decision-makers, and managers to gain knowledge about the prevailing tax culture in the society. A progressive tax culture can significantly contribute to Iran's economic development. Therefore, factors affecting the tax culture must be identified and effective measures should be taken into account accordingly. This study is applied, descriptive-correlational study examines the relationship between tax culture and risky tax-avoidance in companies listed on the Tehran Stock Exchange. The research data included the financial data of the listed companies form 2008 to 2017. Regression panel data is applied to test the research hypotheses. The results show that there is a significant and positive relationship between tax culture and lower effective tax rates with prospective tax rate fluctuations and stock price fluctuations. Hence, more attention must be paid to the tax culture in taxation. Additionally, the funds arising from tax avoidance should be utilized in investment to increase the projected cash flow, and as a result, reduce the capital costs.