Border Work in Italy-Switzerland Relations (cross-border guide)

Context

The judgment no. 83/2026 of the Tax Court of second instance of Lombardy is part of a particularly important litigation strand in cross-border tax relations between Italy and Switzerland, jointly addressing issues of income qualification, interpretation of the concept of frontier worker and application limits of the credit for taxes paid abroad. The ruling is noteworthy because, although it arises from an assessment relating to the 2017 tax period and therefore in the force of the previous structure of border workers, it contains statements that may also affect the current debate about the relationships between conventional qualification, economic-legal substance of the relationship and protection from the risk of double taxation. The fact The dispute originates from a notice of assessment issued by the Revenue Agency against a taxpayer resident in Italy, a partner and chairman of the management of a Swiss company, who qualified as a frontier worker. The Office disregarded the subordinate nature of the relationship and taxed the income received in Italy, considering the conventional regime specific to border workers inapplicable. In the first instance, the appeal was rejected; the taxpayer then appealed, deducing, among other things, the delay in the assessment, the lack of signing of the deed, the violation of the adversarial, the erroneous

Operational details

The decision enhances, in a substantive key, the absence of the subordination requirement. According to the Court, the taxpayer was not straightforward, but cumulated the role of partner, chairman of the management and signatory of the contract both as an employer and as a collaborator; this excluded at root the attributability of the relationship to employment. This conclusion is based on a criterion that is not merely formal, but substantial: the existence of an employment contract is not enough, it is necessary to verify whether there is a real subjection of the provider to the organisational and managerial power of others. From this point of view, the judgment is consistent with a strict reading of the Convention, which cannot be bent to elusive purposes by means of negotiating self-qualifications. The notion of frontier is therefore not a pure "geographical" category, but a figure that combines territorial proximity and the specific nature of the employment relationship. Income requalification Particularly interesting is the passage with which the Court excludes the application of art. 15 of the Convention, dedicated to employment, and places the income received in the area of art. 16, relating to managerial and administrative activities. The redevelopment is not neutral: it entails the loss of the tax treatment proper to border workers and reopens the full operation of the Italian principle of world taxation, except for conventional coordination. The solution

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Key points

The Court recalls art. 165 TUIR, which generally allows the deduction of definitive foreign taxes within the limit of the Italian tax share corresponding to foreign income. However, paragraph 8 expressly states that "the deduction is not due in the event of failure to submit the declaration or failure to indicate the income produced abroad in the declaration submitted". On this basis, the Court excludes the claim, noting that the taxpayer had not declared the disputed income in Italy. The decision is based on a strict guideline, which subordinates the protection against double taxation to compliance with internal declaratory obligations. The data is of considerable practical impact: even when the income has actually been taxed in Switzerland, the declaratory omission in Italy can prevent the recovery of the foreign withdrawal through credit. The systematic tension is evident. On the one hand, the Convention requires Contracting States to eliminate double taxation through the mechanisms provided for in Article 24 ; on the other hand, Italian domestic law makes the concrete use of credit subject to strict procedural conditions. Judgment no. 83/2026 opts for a strictly legal reading of the TUIR, without opening up to corrective solutions of a conventionally oriented type. Concluding considerations Judgment no. 83/2026 has an interest that goes beyond the concrete case. It

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