Family office move to Spain: tax residence, PE risk and foreign assets

When a family office moves part of its life to Spain, the tax question is rarely just “how many days will the principal spend there?” The harder question is whether Spain becomes the tax center for the family, the investment platform, or both. A spouse may relocate first. Children may start school in Madrid, Barcelona, Valencia or Malaga. A CIO may begin taking calls from a Spanish home office. A foreign holding company may keep its legal seat abroad while board decisions, bank mandates and investment approvals quietly move to Spain.

That is the risk this article addresses: not a generic overview of residencia fiscal, but the private-client checklist for a family office that wants to move to Spain without accidentally creating a Spanish permanent establishment, Spanish corporate tax residence, missed foreign-asset reporting, or an avoidable wealth-tax exposure. For Spanish-speaking LATAM families and multi-jurisdiction groups, Legal Fournier handles this as a coordinated relocation and tax-governance project, not as a form-filling exercise. See our private-client route for LATAM families moving to Spain and our support for Spanish income tax filing when the family is already inside the Spanish tax year.

The point is not to avoid Spanish taxation at all costs. Often the right answer is to accept Spanish residence for one or more family members and document the rest correctly. The point is to decide before the move which persons, companies, trusts, funds, mandates and reporting obligations are meant to become Spanish-facing, and which should remain demonstrably managed elsewhere.

Start with the family map, not the calendar

The first mistake is to treat the family office as one taxpayer. Spain will usually look person by person and entity by entity. The principal, spouse, adult children, minor children, investment companies, operating companies, holding vehicles, philanthropic structures, directors and key employees can each have a different Spanish tax position.

Under Article 9 of Law 35/2006, an individual can be considered Spanish tax resident if, among other criteria, they spend more than 183 days in Spain during the calendar year, or if the main nucleus or base of their activities or economic interests is in Spain, directly or indirectly. The same article also contains a rebuttable family presumption where the non-legally separated spouse and dependent minor children habitually reside in Spain.

The Spanish Tax Agency also explains in its income-tax taxpayer guidance that a Spanish tax resident is taxed on worldwide income, while a non-resident is taxed in Spain only on Spanish-source income, subject to any applicable tax treaty. It also confirms that the Spanish tax year for individuals is the calendar year and that a person is treated as resident or non-resident for the whole year, not for a split part of the year. That point matters when a family lands in Spain in April or September and assumes the first year can be divided casually. For the broader Spanish-language primer, see our guide to residencia fiscal en Espana; this article stays on the narrower family-office risk map.

Dual residence is not a strategy by itself

Many international families begin with an assumption that a treaty will protect them. Sometimes it will. The Spanish Tax Agency’s dual-residence guidance explains the usual treaty logic: permanent home, closer personal and economic relations, habitual abode, nationality and, if needed, mutual agreement between authorities. Spain also publishes an official index of double-tax treaties signed by Spain.

But a treaty answer still depends on facts. A family office that keeps the principal’s old tax home abroad but moves the spouse, children, principal residence, domestic staff, investment committee and banking authority to Spain has not created a clean treaty file. It has created a facts problem. The treaty analysis should be documented before relocation, not reconstructed after the first AEAT request.

Permanent establishment Spain: where the family office becomes the business

The SEO keyword here is “permanent establishment Spain”, but for a family office the practical question is more concrete: does the foreign business now have a taxable Spanish footprint because decision-makers, employees, offices or agents are operating from Spain?

The Spanish Tax Agency’s definition of establecimiento permanente refers to a non-resident person or entity carrying on business in Spain through a continuous or habitual place of work, or through an authorised agent habitually contracting in the name and for the account of the non-resident. Its practical census guidance also notes that, where Spain has a treaty with the other country, the treaty definition of permanent establishment should be checked first, often following the OECD model.

That creates several family-office edge cases:

There is also an important limiting point. AEAT’s census guidance notes, consistently with treaty logic, that the mere fact that one company controls or is controlled by another company in the other state does not, by itself, make either company a permanent establishment of the other. That is useful, but it is not a free pass. The risk is not the ownership chart alone; it is what the people in Spain actually do.

If a PE exists, the filing position changes materially. AEAT states that a non-resident taxpayer obtaining income through a Spanish permanent establishment must file under the same corporate tax return model as corporate taxpayers, using the relevant PE payment/refund document and PE identifying key. For a family office, this can affect accounting, transfer pricing, expense attribution and governance. It should be decided deliberately, not discovered during a bank KYC or tax audit process.

Corporate tax residence: the effective management trap

PE is not the only corporate risk. A foreign company can also face Spanish corporate tax residence analysis. Article 8 of Law 27/2014 on Corporate Income Tax treats entities as Spanish resident if they are incorporated under Spanish law, have their registered office in Spain, or have their effective management headquarters in Spain. The statute explains that effective management is where the direction and control of the whole of the entity’s activities are located.

For a family office, this is often more dangerous than the family expects. The company may remain incorporated in Luxembourg, the United Kingdom, Switzerland, the United States, Panama, Mexico, Colombia or the UAE. But if the real investment approvals, financing decisions, risk decisions, asset-allocation meetings and director instructions are now made from Spain, the Spanish effective-management file becomes relevant.

This does not mean every foreign holding company must move to Spain when the family moves. It means the governance must match the intended tax position. Board meetings, investment committees, director travel, local substance, minutes, bank signatory protocols and professional-adviser instructions should be coherent. If the Spanish family residence becomes the practical control room, formal documents signed abroad may not be enough.

Where a Spanish platform is desirable, it may be cleaner to create or adapt the structure intentionally, for example through a Spanish company, a properly documented service company, or a formal local accounting and payroll setup. Legal Fournier can coordinate this with Spanish company formation, monthly accounting and banking support where the family office decides to operate from Spain rather than merely live there.

Foreign assets: the reporting file comes before the first return

The foreign-asset checklist is not a side note for wealthy families. It is usually the most document-heavy part of the first Spanish tax year. Spain’s Modelo 720 regime is built from the foreign-asset information obligation in the General Tax Law and the implementing rules for foreign accounts, foreign securities and rights, insurance and annuities, and foreign real estate. AEAT’s own Modelo 720 procedure page explains that the model channels the three information obligations in Articles 42 bis, 42 ter and 54 bis of Royal Decree 1065/2007.

For a family office, the work is not simply listing bank accounts. The first inventory should identify:

• Foreign bank and brokerage accounts, including accounts where a Spanish-resident family member is authorised or has disposal powers.
• Listed and unlisted securities, fund interests, notes, bonds, insurance policies and annuities held abroad.
• Foreign real estate, including direct ownership, rights over real estate and changes in ownership during the year.
• Crypto assets or virtual currencies held through foreign custodians, which may need separate Modelo 721 analysis.
• Beneficial ownership positions, powers of attorney and nominee arrangements that may be visible to banks or CRS reporting but not obvious from the family balance sheet.

AEAT’s FAQ materials refer to the EUR 50,000 threshold logic for the first obligation in each asset block, and to the EUR 20,000 increase rule for later years once a block has already been reported. AEAT also publishes the Modelo 720 filing period, which for the 2026 procedure is 1 January to 31 March 2026. Those dates can change for future campaigns, so the current year’s AEAT procedure page should always be checked before filing.

One point is especially relevant to inbound executives and certain relocated professionals: AEAT’s Modelo 720 FAQ on obliged taxpayers states that a Spanish resident under the special inbound-worker regime in Article 93 of the Personal Income Tax Law is not obliged to file Modelo 720, because that regime does not tax the person on worldwide income in the same way. The same FAQ warns, however, that this does not automatically extend to the rest of the family unit. For a family office, this means the principal, spouse and children may not share the same reporting outcome.

Wealth tax and large-fortunes tax should be modelled early

Spanish income tax is only one layer. AEAT describes the Spanish Wealth Tax as a tax on the net wealth of individuals: economic assets and rights, less qualifying charges, encumbrances, debts and personal obligations. For high-net-worth families, the analysis should include Spanish Wealth Tax, regional rules, treaty interaction where relevant, and the relationship with the temporary solidarity tax on large fortunes.

Law 38/2022 created the Impuesto Temporal de Solidaridad de las Grandes Fortunas as a direct, personal tax complementary to Wealth Tax for individuals with net wealth above EUR 3,000,000, in the terms of the statute. AEAT’s Modelo 718 procedure page is the current administrative entry point for that filing.

The planning issue is not simply whether an exemption exists. The family needs to know who owns what on 31 December, whether a spouse or adult child owns assets separately, how foreign trusts or foundations are characterised for Spanish purposes, whether business or participation exemptions may be available, and how debt is documented. In some cases, moving the family before cleaning up ownership documentation can make the first Spanish wealth-tax year unnecessarily difficult.

Pre-move checklist for A family office

The safest workstream is not a single tax memo. It is a controlled relocation file with evidence, governance and filings aligned before the family becomes visible in Spain.

When Legal Fournier should be involved

A family office should not wait until the first Spanish tax return is due if any of the following are true:

• The principal or spouse will spend substantial time in Spain while retaining foreign companies or investment mandates.
• Children or dependent family members will move to Spain before the principal’s formal tax move.
• Directors, executives, assistants or investment professionals will work from Spain for a foreign entity.
• The family owns foreign real estate, private companies, funds, insurance wrappers, trusts, foundations, crypto assets or multi-bank portfolios.
• The family is considering the inbound-worker special tax regime, but other family members may become ordinary Spanish tax residents.
• A Spanish home purchase, Golden Visa legacy issue, non-lucrative residence, digital nomad route, EU-family route or company formation is happening at the same time.

Our role is to coordinate immigration, tax residence, corporate substance, reporting and Spanish filing mechanics so the move is coherent. That can include NIE and bank account coordination, company setup, monthly accounting, income tax, foreign-asset reporting and a written risk map for the family office and its foreign advisers. If the file is already live, start with a Talk to a Spanish lawyer so the facts can be triaged before any Spanish filing or restructuring step is taken.

FAQ

Can a family office move to Spain without creating a permanent establishment?

Yes, in many cases, but it depends on functions, authority and evidence. A passive family residence is different from a Spanish office where staff negotiate, sign, manage assets or make operating decisions for a foreign entity. The analysis should be done by entity and by role.

Does spending fewer than 183 days in Spain prevent Spanish tax residence?

Not automatically. The 183-day test is important, but Spanish law also looks at the main nucleus or base of activities or economic interests, and includes a rebuttable family presumption. A treaty may help in a dual-residence case, but the facts still need to be documented.

If the family office company is incorporated abroad, can Spain still tax it as resident?

Potentially, yes. Spanish corporate tax residence can be triggered by effective management in Spain. If strategic direction and control move to Spain while the company remains incorporated abroad, the governance file needs review.

Does Modelo 720 apply to all family members?

Not always. The answer depends on who is Spanish tax resident, the asset category, the value thresholds, ownership or authorisation rights, and whether a special regime applies. A principal under the inbound-worker regime may have a different position from a spouse or child.

Should the family restructure before or after moving to Spain?

Usually before, or at least before the first Spanish-resident 31 December snapshot and first filing season. Once the family is resident, asset transfers, company control, trust distributions and debt documentation can have Spanish tax consequences that are harder to manage retrospectively.

Talk to a Spanish lawyer