Rezumat: The article addresses a series of theoretical and practical aspects regarding the definition of the related enterprises, which was introduced in the Fiscal Code through the Government Emergency Ordinance No. 31/2024, necessary for calculating the 500,000-euro threshold for applying the taxation regime on micro-enterprises’ income. Starting from January the 1st, 2024, in applying the provisions regarding this threshold, the limit on the realized income is verified by considering the income earned by the Romanian legal entity, combined with the income of the related companies. The incomes to be considered are those constituting the taxable base for micro-enterprises as provided in Article 53 of the Fiscal Code. The companies that were micro-enterprises in 2023 and can no longer apply this regime in 2024 due to the restrictions imposed on them, as amended by Government Emergency Ordinance No. 31/2024, must submit Form 700 by April 15, 2024. Emergency ordinance also amends the rules for exiting the taxation system for micro-enterprise income.