What is Private Interest Foundation?

How it works

A private interest foundation (Stiftung in German, fundación de interés privado in Spanish) is the civil-law equivalent of a trust. Common-law trusts don't translate cleanly to civil-law systems (France, Germany, Spain, Latin America, Switzerland) — civil-law tradition didn't recognise the trust's "split ownership" between trustee and beneficiary. The private interest foundation fills the same role with a civil-law-compatible structure.

Key structural difference from a trust:

• Trust = a relationship. The trustee holds legal title; beneficiaries hold equitable interests.
• Foundation = a separate legal person. The foundation owns the assets in its own name; the founder + protector + beneficiaries have specified roles + rights but no direct ownership.

The foundation has:

• Founder — provides the initial endowment + sets the constitutional document (foundation charter + by-laws).
• Foundation council — governs the foundation (analogous to trustees).
• Protector — optional supervisory role, often controlling key decisions.
• Beneficiaries — receive distributions per the by-laws.

Standard jurisdictions

• Panama — Private Interest Foundation Act 1995. The first jurisdiction to specifically design foundations for international private use. Reportedly thousands of Panama foundations in active use.
• Liechtenstein — Stiftung law dates to 1926; recently updated 2009 to align with EU pressure. Premium-priced; high-substance environment.
• Curaçao, Antilles — Stichting Particulier Fonds (SPF).
• Bahamas — Foundation framework introduced 2004.
• Switzerland — family foundations under Swiss Civil Code (more limited than offshore versions).

Common uses

• Multi-generational wealth structuring for HNW families from civil-law countries (Latin America, Spain, Germany, Italy) where the trust is unfamiliar / poorly recognised.
• Asset protection with a more concrete structure than the relational trust.
• Succession planning in civil-law jurisdictions where forced-heirship rules constrain testamentary freedom.
• Charitable + private purpose blends — combining family-purpose distributions with philanthropy.

Tax treatment

Treatment in the founder's / beneficiaries' home countries varies enormously and is the central question:

• Common-law countries (US, UK, Australia) — typically treat foundations like trusts under their domestic look-through rules. US grantor-trust rules can apply. UK transfer-of-assets-abroad rules can apply. Form 3520 / 3520-A reporting often required for US persons.
• Civil-law countries with explicit foundation legislation (Germany, Switzerland, Liechtenstein, Austria) — tax treatment varies; can be opaque (treated as separate entity) or transparent (looked through to founder / beneficiaries) depending on structure + control.
• Civil-law countries without specific foundation legislation (France, Spain, Italy) — increasingly use anti-abuse statutes (France Loi 2011 trust régime, Spain régimen de transparencia fiscal internacional) to look through the foundation to the founder / beneficiaries for tax purposes.

The CFC-style anti-deferral rules + BO transparency + CRS reporting mean the foundation today is highly visible to home tax authorities, not a privacy mechanism.

Examples

• Mexican HNW family establishes Panama Private Interest Foundation. Founder is the family patriarch; protector is family attorney; beneficiaries are his three children. Foundation owns family business holding shares + investment portfolio. Mexican tax: anti-abuse rules (régimen de transparencia fiscal) typically look through the foundation; family pays Mexican tax on attributed income.
• German HNW founder uses Liechtenstein Stiftung for inheritance planning. Founder transfers €30M of investments. German tax: Stiftung treatment depends heavily on whether founder retains revocation rights (transparent → founder taxed) or completes irrevocable transfer (potentially opaque, but anti-abuse rules apply). German Außensteuergesetz §15 attribution rules can pull income back into founder's tax base.

Common mistakes

• Treating private interest foundation as tax-free. Almost never. Home-country anti-abuse rules typically look through.
• Skipping US Form 3520 / 3520-A. US persons connected to foreign foundations face the same severe penalties as for foreign trusts.
• Underestimating substance requirements. Letterbox foundations face beneficial-owner challenges + tax recharacterisation.
• Confusing private interest foundation with charitable foundation. Different legal animals with different tax regimes.