The Impact of Firm Size on Relationship between Tax and Capital Structure of the Listed Companies in Tehran Stock Exchange

The current investigation examines the relationship between tax as an accounting variable and capital structure as factor based on stock price and bond with regard to firm size. Firms supply their cash mainly through different methods, but various factors such as firm size would impact their decisions as well as financing methods would impact taxable incomes, hence, this study uses data of the listed companies in Tehran stock exchange during 2009 to 2013 and examined the given data in the form of data panel regression in order to investigate the impact of firm size on relationship of between tax and capital structure. The results suggested that tax in big firms has negative impact on capital market and debt ratio in capital market getting increased along with increased tax, but in small firms, increased tax lead to increased capital market, i.e. debt ratio getting increased.