Substantiating the concept of equity is an issue of interest to specialists in accounting, taxation and finance. The purpose of this article is to present three of the sensitive issues generated by the concept of equity. One aspect considered is the demarcation of financial liabilities from the equity instruments. The distinction between equity and debt instruments is necessary because it has consequences on financial reporting. A second part of the study focuses on the fiscal side, trying to find the answer to the question: Are there deferred taxes recognized in equity? Deferred tax liabilities will be presented at the end of the year in equity and not debt, because they are related to gains recorded directly in equity. The third part of the article discusses the financial importance of equity, focusing on subscription and attribution rights as financial instruments used when raising capital. By creating subscription rights it is desired to obtain immediate funds needed to finance the entity.