Foreign Private Foundations When Resident in Spain: Tax Treatment and AEAT Risks

The Challenge: Spain and Foreign Private Foundations

Many high-net-worth individuals who relocate to Spain already hold assets through private foundations established in low-tax or civil law jurisdictions — Liechtenstein Anstalts, Panama private interest foundations, Dutch Stichtingen, Swiss foundations and similar structures. These vehicles were often established for legitimate family governance, estate planning or philanthropic purposes, and may have been perfectly appropriate in the owner's previous country of residence.

Becoming Spanish tax resident changes the picture fundamentally. Spain's tax system treats foreign private foundations with deep scepticism, applying CFC-like attribution rules, imposing aggressive Modelo 720 reporting obligations, and in some cases treating the foundation as entirely transparent for Spanish tax purposes. This guide explains the framework and the principal risks.

How Spain Classifies Foreign Foundations: Transparency vs Opacity

The starting point for analysing any foreign foundation structure is how Spain characterises the entity for tax purposes. Spain's general approach is to look through the legal form of the foreign entity and apply a substance-over-form analysis:

Opaque Structures (Taxed as Companies)

A foreign foundation that genuinely holds assets independently of the founder — where the assets have been irrevocably transferred, the founder has no right to reclaim them, and the foundation's governing body exercises independent discretion over distributions — may be treated by Spain as an opaque corporate entity, broadly equivalent to a company for Spanish tax purposes. In this case, the foundation itself is not transparent; instead, distributions to Spanish-resident beneficiaries are taxed as they are received, typically as capital income (dividends) at the savings-income rates.

Transparent Structures (Attribution to the Founder)

Where the foundation structure lacks genuine independence — for example, where the founder retains effective control over the assets through a letter of wishes or side arrangement, can revoke the foundation or reclaim assets, or where the foundation's decisions are effectively dictated by the founder — Spain treats the foundation as transparent. The assets and income of the foundation are attributed directly to the Spanish-resident founder as if the foundation did not exist. The income is included in the founder's IRPF base in the year it arises, not in the year it is distributed.

AEAT's approach is essentially: if the founder controls it, it is his; if he does not control it, when can he access his money? Both questions are designed to capture tax that would otherwise be deferred or avoided.

CFC Rules: Article 91 LIRPF

Even where a foreign foundation is not treated as fully transparent, Spain's Controlled Foreign Company (CFC) rules under Article 91 LIRPF may attribute certain passive income of the foundation to the Spanish-resident founder or beneficiary. The CFC rules apply where:

• The Spanish resident has, alone or together with connected persons, more than 50% direct or indirect control or economic interest in the foreign entity
• The foreign entity pays tax at less than 75% of what Spanish tax would have been on the same income
• The entity's income includes certain passive categories: dividends, interest, royalties, capital gains from assets not related to active business, income from financial leasing or insurance

Where these conditions are met, the passive income of the foundation is attributed to the Spanish resident on a current-year basis — not when distributed — and included in the general income tax base at progressive rates of up to 47%.

The Economic Substance Exemption

The CFC rules include an important exemption: if the foreign entity carries out a genuine economic activity in its territory of residence using its own means (staff, premises, management), the passive income rules do not apply. However, for a pure holding or wealth preservation foundation with no staff and no genuine management activity in its jurisdiction, this exemption is not available.

For EU and EEA-based foundations (Liechtenstein Stiftung, Dutch Stichting, Luxembourg Foundation), there is an additional EU/EEA carve-out — the CFC rules apply only if the structure is deemed artificial (no genuine economic activity, established purely to avoid Spanish tax). This provides somewhat more protection for foundations with genuine charitable or family governance purposes established in EEA jurisdictions.

Modelo 720: Reporting Obligations

All Spanish tax residents who have interests in foreign foundations above certain thresholds are required to report those interests on Modelo 720, Spain's infamous foreign asset declaration. The obligation applies where the total value of the relevant foreign assets exceeds €50,000, and covers three categories:

• Accounts in foreign financial institutions
• Securities, shares, and rights held abroad
• Real estate and rights over real estate located abroad

For foreign private foundations, the reporting obligation arises where the Spanish resident is the founder, beneficiary, or de facto controller of the foundation, even if the assets are not formally in the resident's name. AEAT considers the beneficial ownership substance rather than the legal form.

The Modelo 720 must be filed by 31 March following the relevant year, with subsequent filings required only when the value of any category increases by more than €20,000 (or where new assets or accounts are added). The penalties for failure to file were historically draconian — fixed penalties of €5,000 per item not declared — although the European Court of Justice's January 2022 ruling against Spain's disproportionate penalty regime has led to some moderation. However, penalties for deliberate concealment remain severe.

Exit Tax Implications

If a Spanish resident with an existing foreign foundation structure later loses Spanish tax residency — for example, by moving back to the UK or to another country — Spain imposes an exit tax under Article 95 bis LIRPF on unrealised gains in assets above certain thresholds. This applies to:

• Shares or participations representing more than 25% in any entity
• Or assets with a total value exceeding €4 million (regardless of percentage)

For foundation structures, the exit tax position is complex: where the foundation has been treated as transparent, the underlying assets are effectively attributed to the founder and are subject to exit tax on unrealised gains. AEAT has been developing its position on this area, and specific advice is essential for any individual contemplating departure from Spain with an existing foundation structure.

Distributions from Foreign Foundations

When a foreign private foundation makes a distribution to a Spanish-resident beneficiary, the tax treatment depends on the characterisation of the foundation:

Double Tax Treaty Access

Private foundations face a significant obstacle in accessing the benefits of double tax treaties. Most Spanish DTTs follow the OECD Model Convention, which generally limits treaty benefits to persons who are "liable to tax" in one of the contracting states. Many private foundations — particularly those in Liechtenstein, Panama, or the Cayman Islands — are not subject to meaningful taxation in their jurisdiction of establishment, and may not be recognised as "persons" for treaty purposes at all.

The OECD's Base Erosion and Profit Shifting (BEPS) project and the associated Multilateral Instrument have introduced additional anti-abuse provisions (the Principal Purpose Test and the Limitation on Benefits articles) that further restrict treaty access for structures that do not have a genuine business purpose in the treaty partner jurisdiction.

In practice, this means that distributions from a Liechtenstein or Panama foundation to a Spanish resident can rarely be structured to benefit from reduced withholding tax rates under a DTT. The full domestic withholding tax of the source country may apply, combined with full Spanish IRPF on receipt — a potentially very damaging outcome.

AML/KYC Considerations

Beyond tax, Spanish-resident founders of foreign foundations face increasing compliance obligations under Spain's anti-money laundering framework (Ley 10/2010) and the EU's 5th and 6th AML Directives. Spanish banks and financial intermediaries are required to conduct enhanced due diligence on clients with connections to private foundations, particularly those established in offshore or opaque jurisdictions. Clients who are founders or ultimate beneficial owners of private foundations may find that Spanish banks require detailed documentation of the foundation's structure, purpose and governance before accepting their business.

Practical Structuring Advice for Incoming Residents

For HNW individuals with existing foundation structures who are considering Spanish residency, the following planning steps are critical:

1. Pre-arrival review: Conduct a comprehensive review of the foundation's structure, governance, and asset composition before becoming Spanish resident. The pre-residency period is the window in which restructuring can be carried out without triggering Spanish tax.
2. Assess transparency vs opacity: Determine how AEAT is likely to characterise the foundation — as opaque or transparent. The answer dictates the applicable tax regime and the optimal restructuring approach.
3. Consider whether to liquidate or restructure: In some cases, it is more tax-efficient to liquidate the foundation before arrival (crystallising any gain outside Spain's tax net) rather than to arrive with an existing structure that will create ongoing compliance burdens and tax risks.
4. File Modelo 720 on time: If Spanish residency is established with an existing foundation, the first Modelo 720 must be filed by 31 March following the year of arrival. Missing this deadline is a costly mistake.
5. Document independent governance: If retaining the foundation, ensure that its governance arrangements genuinely reflect independent management — minutes of foundation board meetings, evidence of independent decision-making, proper separation between founder instructions and foundation decisions.