Rezumat: This article discusses a series of conceptual and practical issues regarding taxation mechanism of revenues from independent activities based on the income tax bracket. For tax payers who obtain revenues from independent activities apart from liberal professions, and perform activities contained in the classified list from the Regional Directorates General of Public Finance, the net annual income is determined on the basis of annual income tax bracket from the place of work. These tax payers have a number of filling and payment obligations. They set out the annual tax and social contributions paid through the single return for income tax and social contributions by natural persons.