Introduction

Although the legal definition of income from economic activities included in article 27.1 of the Income Tax Law is unique, it is necessary to differentiate within them those derived from the exercise of business and professional activities and, within the former (business activities), those of commercial and non-commercial nature.

The importance of these distinctions lies in the different tax treatment of each type of income, in aspects as significant as the subjection to withholding or payment on account, the accounting and registration obligations of the holders of said activities and the separate declaration of the same. From this latter perspective, the declaration model distinguishes the following types and keys of economic activities: