The obligation to open a VAT number takes place according to the character of habituality or, vice versa, of the occasional nature with which a specific activity is carried out. In particular, on the basis of the provisions of the law, anyone who carries out a habitual and continuous economic activity of a commercial, artisan or industrial enterprise in the form of an individual firm or company, or as a freelancer (registered or not with a professional body) , is subject to the obligation to open a VAT number.
The law obviously takes care of clarifying when an activity can still be considered occasional. Two, in particular, the aspects to pay attention to:
The service must have a total duration of no more than 30 days.
The total remuneration for the service must not exceed 5,000 euros.
If one of the two conditions is not met, the activity is considered habitual and all the necessary obligations take over.