For European high-net-worth individuals, international asset and corporate structuring has long been everyday practice. Stakes in operating companies across different jurisdictions, cross-border property investments and globally diversified capital allocations mean that tax connecting factors regularly arise in several countries at the same time.
Where different tax regimes – for example based on the residence, source or territoriality principle – apply in parallel, the same item of income may be taxed more than once. Despite a dense network of double tax treaties, material risks remain: divergent classifications of income, differing definitions of residence or domestic anti-avoidance provisions can lead to unexpected additional burdens.
For entrepreneurs, this is not merely about a temporary overpayment of tax. Double taxation can distort return projections, tie up liquidity reserves and impair long-term exit or relocation strategies. Forward-looking structuring is therefore not a minor technical tax issue, but part of strategic wealth preservation.
The following article highlights typical double-taxation traps in the European context, places them in their legal framework and shows which structural and contractual measures HNWIs can use to identify these risks early and minimise them effectively.
International double taxation arises from the parallel application of different taxing principles. Most states link tax liability either to the place where income is generated (source principle) or to the taxpayer’s personal residence (worldwide income principle).
While the source principle provides for taxation where the economic activity takes place, taxpayers in the state of residence are generally subject to unlimited tax liability on their worldwide income. Countries such as Germany, France or Italy combine both approaches: domestic-source income is taxed regardless of residence, while individuals resident domestically must declare their entire worldwide income.
When these different connecting systems overlap, competing taxing rights arise. To avoid such conflicts, states conclude bilateral double tax treaties (DTTs), which typically follow the OECD Model Tax Convention. They allocate taxing rights between the state of residence and the source state and set out how double taxation is to be relieved.
Two relief methods are used in particular: the exemption method and the credit method. Under the exemption method, foreign income is excluded from the tax base in the state of residence; under the credit method, tax paid in the source state is credited against domestic tax – but only up to the amount of tax due there.
In practice, however, wealthy entrepreneurs often face conflicts due to differing classifications of income, divergent definitions of residence or varying domestic anti-avoidance rules. Even where a DTT applies, residual taxation or unexpected additional charges may therefore remain.
International wealth and corporate structures create strategic opportunities – but they also entail recurring double-taxation risks that cannot be fully ruled out even where a DTT is in place.
Dividends from foreign subsidiaries, intra-group interest payments or royalties are among the most common areas of conflict. Source states typically levy withholding tax, while the state of residence also includes the income in its tax base.
Although DTTs generally provide for a reduction in withholding tax or a credit, residual burdens arise in practice due to:
• different classification of the type of income (e.g. dividend vs. constructive dividend distribution)
• domestic anti-avoidance provisions
• withholding tax components that cannot be credited
Complex holding structures with multiple intermediary companies significantly increase this risk.
A particularly sensitive area for HNWIs is moving residence. States link unlimited tax liability to different criteria – residence, habitual abode or centre of vital interests.
If dual residence arises, the so-called tie-breaker rules in the DTT apply. Even so, risks remain, for example where:
• one state later assesses residence differently
• an exit tax is triggered
• latent gains are taxed at the time of departure
In particular, significant liquidity strain can arise for entrepreneurial shareholdings.
Under international standards, real estate is generally taxed in the state where it is situated. On disposals, many countries apply speculation or capital gains rules – irrespective of the owner’s residence.
Conflicts arise in particular where:
• different holding periods apply
• the state of residence also taxes the gain
• the DTT does not allocate taxing rights clearly
The result may be de facto double taxation or, at least, timing mismatches in taxation.
Business activities in several EU states quickly raise the question of whether a taxable permanent establishment exists. Even a fixed place of business or a dependent agent can be sufficient.
If a permanent establishment is created, the state of activity has a taxing right. If the states involved interpret the rules differently, parallel taxation of the same profit share may occur.
Digital business models and remote structures further intensify this issue.
For intra-group transactions, tax authorities require arm’s-length pricing. Deviations often lead to unilateral profit adjustments.
If profits are increased abroad without a corresponding adjustment by the state of residence, economic double taxation arises. Mutual agreement procedures under the DTT are possible, but they are time- and resource-intensive.
For internationally active entrepreneurs, a robust transfer pricing system is therefore essential.
Even if income is formally earned abroad, domestic CFC or attribution rules can result in those profits being attributed directly to the domestic shareholder.
This particularly affects low-taxed foreign companies. The outcome is taxation in the state of residence – often in addition to the burden in the source state.
Here too, DTTs apply only to a limited extent, as many of these rules are designed as domestic anti-avoidance provisions.
International double taxation is not an unavoidable risk of cross-border activity. In most cases, multiple taxation can be significantly reduced through forward-looking structuring and careful legal analysis.
Before any investment or restructuring decision is made, the relevant double tax treaties should be analysed in detail. Beyond the allocation of taxing rights, the following aspects should be reviewed in particular:
• withholding tax rates on dividends, interest and royalties
• credit or exemption method
• classification issues for specific types of income
• anti-abuse clauses (e.g. Principal Purpose Test)
Scenario analyses make it possible to simulate the effective overall tax burden realistically in advance.
Choosing the holding location and legal form is of central importance for HNWIs. Countries with stable DTT networks and clear participation privileges can enable a tax-efficient intermediary structure.
Tools such as participation exemption regimes or group-law structuring using European corporate forms offer flexibility – provided substance requirements and anti-avoidance rules are observed.
A purely formal interposition without any economic function is generally insufficient under today’s legal landscape.
Relocations should never be undertaken purely for tax reasons; they must be prepared comprehensively. Key points include:
• review of possible exit taxation (exit tax)
• valuation of latent gains prior to relocation
• documentation of the centre of life to avoid dual residence
• alignment with tie-breaker rules in the DTT
An uncoordinated move of residence can lead to significant liquidity pressures.
A robust transfer pricing system with master file and local file documentation reduces the risk of unilateral profit adjustments. If double taxation nonetheless occurs, a mutual agreement procedure under the DTT or an advance pricing agreement (APA) may be considered. These instruments provide legal certainty, but they are time- and resource-intensive.
International business activities should be structured so that unintended permanent establishments are avoided. In particular, the following should be analysed:
• ongoing fixed places of business
• dependent agents
• management and decision-making structures
• digital presence models
Clear contractual and practical separation of functions is crucial.
International holding or investment structures are increasingly subject to CFC regimes and anti-avoidance provisions. Before implementing an overseas structure, it should be examined:
• whether low taxation exists within the meaning of national CFC rules
• whether passive income can be attributed
• whether sufficient economic substance can be evidenced
A structured pre-review prevents later attributions and unexpected additional tax burdens.
Avoiding international double taxation requires less in the way of isolated measures and more in the way of structured tax governance. A practical implementation framework for European entrepreneurs includes in particular:
Systematic stocktake: capturing all international income sources, shareholdings, permanent establishment risks and personal interdependencies.
Cross-jurisdiction coordination: coordination between advisers in all affected states to identify classification conflicts at an early stage.
Tax burden simulation before transactions: no investment, restructuring or relocation of residence without prior scenario analysis of the overall tax impact.
Documentation and substance management: evidence of economic activity, proper transfer pricing documentation and clear allocation of functions within international structures.
Ongoing monitoring: international tax planning is not a one-off project but a continuous process. Changes in law, case law and new anti-avoidance rules can alter existing structures at any time.
International double taxation is not an exception, but a structural consequence of parallel taxing claims by sovereign states. Double tax treaties significantly reduce this risk, but they do not eliminate it entirely. Divergent classifications, domestic anti-avoidance rules and differing definitions of residence can lead to additional burdens even where a DTT applies.
For European HNWIs, this means: tax internationalisation is not an administrative side issue, but part of strategic wealth management. Anyone planning investments, holding structures or relocations without an upfront overall analysis risks not only higher tax costs, but also substantial liquidity and planning disadvantages.
By contrast, forward-looking, legally sound and cross-border coordinated structuring creates legal certainty and stability – and forms the basis for sustainable international growth.
