The Italy-Spain tax treaty: what it governs, and what the directives govern instead.
Between two EU member states the bilateral treaty is not the main instrument for group flows. Knowing which questions it does answer — residence, permanent establishment, capital gains, people — is what stops a group applying the wrong rule.
Groups operating between Italy and Spain routinely reach for the bilateral treaty when the question is about dividends or royalties, and reach for nothing at all when the question is about where an employee is resident or whether a sales agent has created a taxable presence. Both instincts are backwards.
Between two EU member states, the directives generally do the heavy lifting on intra-group flows, while the treaty governs the questions that arise from people, presence and disposals. This article sets out which is which.
The division of labour.
| Question | Governed mainly by | Practical effect |
|---|---|---|
| Dividends between associated companies | Parent-Subsidiary Directive | Potentially 0% withholding, subject to conditions |
| Interest and royalties between associated companies | Interest and Royalties Directive | Potentially 0%, subject to beneficial ownership |
| Dividends to individuals or non-associated holders | Treaty | Reduced rate against Spanish domestic withholding |
| Corporate residence and dual residence | Treaty | Tie-breaker rules determine which state taxes what |
| Permanent establishment | Treaty | Defines when presence becomes taxable presence |
| Capital gains on shares | Treaty | Allocates taxing rights, including on real-estate-rich entities |
| Employment and director income | Treaty | Which state taxes salary, and the days-based rules |
| Anti-abuse overlay | MLI and directive GAARs | Benefits denied where purpose is obtaining them |
Claiming a treaty rate where a directive gives you zero, or assuming zero where neither applies.
An Italian parent holding a qualifying stake in a Spanish SL may achieve nil withholding under the directive. An Italian individual shareholder holding the same SL directly gets no such relief and falls back on the treaty rate against Spanish domestic withholding. The structure determines the instrument, and the instrument determines the number.
Permanent establishment, the live risk.
This is where the treaty matters most for Italian companies, because Italian groups frequently serve Spain from Italy for years before formalising anything. A permanent establishment is a taxable presence that arises from facts, not from a decision, and once it exists it brings Spanish filing obligations and a profit attribution exercise.
A Spanish salesperson with authority
An employee or agent in Spain who negotiates and effectively concludes sales for the Italian company, works from home or a small office, and has done so for years. The company files nothing in Spain and does not consider itself present there.
A Spanish subsidiary that sells on its own account
The SL buys from the Italian parent at arm's length and sells to Spanish customers as principal. The tax outcome is broadly similar, but it is deliberate, documented and filed — rather than discovered.
People moving between the two countries.
The most common treaty question Italian groups actually face is not about money flows at all. It is about a person: an Italian manager spending significant time in Spain, a Spanish employee reporting to Milan, or a director on both boards.
- Tax residence — day counts, centre of vital interests, and the treaty tie-breaker where both states claim the person
- Where the employment is exercised — generally the state where the work is physically done
- Who bears the cost — whether the salary is borne by a Spanish entity or recharged to one
- Directors' fees, which follow their own treaty article and often a different rule than salary
- Social security, governed by EU coordination rules rather than by the tax treaty — a separate analysis with separate paperwork
- Whether the person creates a PE for the Italian employer through what they do in Spain
That fifth point catches people out regularly. Social security and income tax follow different rules and can land in different countries for the same person. Posting an Italian employee to Spain requires the correct social security documentation, and having the tax analysis right does not mean the social security position is.
The anti-abuse overlay.
Both Italy and Spain are parties to the OECD multilateral instrument, which modifies existing bilateral treaties without renegotiating them — typically adding a principal purpose test and tightening permanent establishment definitions. The directives carry their own general anti-abuse rules alongside.
Reading the 1977 treaty text alone will give you the wrong answer.
The operative position is the treaty as modified by the MLI, as applied alongside the directives and their anti-abuse provisions. Any analysis that quotes the original bilateral text without checking the MLI overlay is incomplete, and this is a common failing in general guidance.
- Convenio / Convenzione
- The bilateral double taxation convention, in Spanish and Italian respectively.
- Stabile organizzazione
- Permanent establishment, in Italian. Establecimiento permanente in Spanish.
- MLI
- The multilateral instrument modifying existing treaties to implement BEPS measures.
- PPT
- Principal purpose test — denies benefits where obtaining them was a principal purpose.
- Certificato di residenza fiscale
- Tax residence certificate; Spain will require the equivalent before applying a reduced rate.
- Operaciones vinculadas
- Related-party transactions, with Spanish documentation and reporting duties.
A Spanish entity resolves most of these questions by construction.
Incorporation, tax activation and related-party documentation set up so the Spanish position is deliberate and filed — rather than argued about later with a PE nobody meant to create.
What withholding applies on dividends from our Spanish SL to our Italian SRL?
Does an Italian sales agent in Spain create a permanent establishment?
Our manager spends half the year in Spain. Where is he taxed?
Do we need a tax residence certificate?
The Italy-Spain cluster.
The treaty answers fewer questions than you think. And more important ones.
Book a free call ↗Alexander Baranov
Seventeen years designing and delivering cross-border corporate structures — incorporation, tax, holding, banking and market entry — for founders and companies expanding into Spain and the EU. Author of professional books on entering the Spanish market.
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