Family Office in Luxembourg

Tax regime

Luxembourg levies corporate income tax (CIT) plus municipal business tax (MBT) on resident companies, with the combined headline rate broadly in the 24-25% range as of recent years (the precise rate varies slightly by municipality, with Luxembourg City the most common reference point). However, the SPF (Société de Gestion de Patrimoine Familial) regime, enacted by the law of 11 May 2007, is specifically designed for private wealth management by qualifying individuals, estates, or similar entities: SPFs are exempt from CIT, MBT, and net wealth tax on income derived from purely passive wealth management activities (dividends, interest, capital gains on securities). They are instead subject to a modest annual subscription tax (taxe d'abonnement) levied on paid-up capital and share premium, currently at a rate of 0.25% per annum, capped at a prescribed ceiling. This makes the SPF highly tax-efficient for holding liquid financial assets and participations, provided no commercial activity is conducted.

For family offices employing a SOPARFI (Société de Participations Financières) structure, a fully taxable Luxembourg company used for holding and financing, the participation exemption regime is a central planning tool: dividends and capital gains on qualifying participations (broadly, a minimum holding of 10% or acquisition cost threshold, held for at least 12 months) are 100% exempt from CIT and MBT, subject to anti-abuse rules. Luxembourg has also implemented the EU Anti-Tax Avoidance Directives (ATAD I and II), including interest limitation rules, CFC rules, and a general anti-abuse rule (GAAR), which a family-office advisor must factor into any structure. Inheritance and gift tax within Luxembourg are levied at rates that depend on the degree of kinship, with direct-line transfers attracting lower rates than collateral relatives; however, Luxembourg does not impose estate tax on movable assets of non-residents, making it attractive for non-domiciled families using Luxembourg holding structures. No withholding tax applies to dividends paid to EU parent companies qualifying under the EU Parent-Subsidiary Directive.

Key regulations

• Law of 11 May 2007 on the Family Wealth Management Company (SPF)

  Establishes the SPF vehicle exclusively for private wealth management by qualifying investors; exempts it from CIT, MBT, and net wealth tax; imposes a 0.25% annual subscription tax on capital.

  Effective May 2007

• ATAD I & II Implementing Laws (Luxembourg)

  Transposed EU Anti-Tax Avoidance Directives into Luxembourg law, introducing interest limitation, exit taxation, GAAR, hybrid mismatch, and CFC rules affecting holding structures.

  Effective January 2019

• Law of 30 May 2018 on Markets in Financial Instruments (MiFID II transposition)

  CSSF-supervised framework governing investment firms and advisors in Luxembourg; applies to MFOs providing discretionary management or advisory services to multiple families.

  Effective May 2018

• SOPARFI Participation Exemption (Income Tax Law, Art. 166)

  Exempts qualifying dividends and capital gains on participations from CIT and MBT, subject to minimum holding thresholds and an annual 12-month holding period.

• CSSF Circular 18/698 (Authorisation and Organisation of Investment Fund Managers)

  Sets governance, substance, and staffing expectations for CSSF-authorised managers; relevant benchmark for regulated family-office management companies.

Substance & residency

Luxembourg's economic substance expectations have hardened materially since the OECD BEPS project and subsequent EU scrutiny, including the EU Code of Conduct Group's assessment of Luxembourg's holding and IP regimes. While Luxembourg is not an 'economic substance jurisdiction' in the narrow sense of the Cayman or BVI statutory frameworks, treaty access and the availability of the participation exemption both require that structures are not artificial arrangements. In practice, the Luxembourg tax authorities (Administration des Contributions Directes, ACD) and the OECD's principal purpose test embedded in post-MLI treaties demand that holding companies have genuine commercial rationale, adequate local management, and sufficiently qualified directors capable of exercising real control in Luxembourg. A minimum credible standard involves at least a majority of Luxembourg-resident or EU-based directors, board meetings physically held in Luxembourg, locally maintained books and records, and ideally at least one dedicated local employee or a contracted management company with genuine oversight capability.

For a Single Family Office (SFO) structured as a regulated entity or employing a dedicated management company, the CSSF expects staffing, systems, and governance commensurate with the complexity and assets managed. An unregulated SPF used solely to hold a family's listed portfolio has lower staffing obligations but must still demonstrate genuine decision-making locally to defend treaty positions. Multi-Family Offices (MFOs) providing investment management or advisory services to third-party families will typically require a CSSF license under MiFID II (as implemented by the Luxembourg law of 30 May 2018 on markets in financial instruments), implying capital adequacy requirements, compliance infrastructure, and qualified staff on the ground. The Grand Duchy's well-developed ecosystem of fiduciary service providers, law firms, and Big Four tax practices means that outsourced substance arrangements are commercially accessible, but regulators and treaty partners increasingly scrutinise whether outsourced functions represent genuine rather than merely formal local presence.