The simple answer is that the income they receive will be taxable. If an EU resident is the UBO of an offshore company in most cases their country of residence will have Controlled Foreign Company Rules, which mean that the profits of the offshore company must be declared by them in their country of residence whether they receive income or not. This depends on a number of factors, including ownership percentages and control. In the case given here it would not matter whether the individual receiving income into the EU was the UBO or not. If they are receiving income from a company they would be obliged to declare this for tax in their country of residence. The only way for the companies profits not to be taxable is if the company was not owned by an individual residing in a country with a CFC regime in which case they 'may' not have an obligation to disclose their overseas companies profits for tax in their country of residence unless they remit them into their home country.