The thesis deals with the analysis of equity transactions and comparing the impact of these transactions for accounting and tax purposes. The introduction describes the characteristics of equity and its arrangement in the balance sheet. The thesis focuses on how the legal regulations of the capital companies are reflected in the accounting of these legal entities and what are the tax impacts of transactions with equity. This includes issues of increase and decrease of share capital, profit shares, capital fund creation, including valuation differences from revaluation of assets and liabilities. There is also mentioned the issue of creating the structure of equity in the transformation of commercial corporations. The final part deals with the disclosure of equity information in the Statement of Changes in Equity