The global economy is built around companies whose operations cross borders, while their profits remain subject to national tax systems. Between transfer pricing, intellectual property, international tax treaties and the global minimum tax, multinational taxation exposes a fundamental contradiction: governments are seeking to tax wealth whose geographical location is becoming increasingly difficult to determine.

One Global Company, Multiple Tax Realities

A multinational corporation can design a product in California, manufacture its components in Asia, arrange its financing through a European financial centre, hold its patents in a separate jurisdiction and sell the finished product in dozens of countries. To consumers, the entire operation belongs to a single company. To tax authorities, it generally consists of a succession of legal entities, contracts, transactions and accounting results.

This difference in perspective is the starting point of international corporate taxation.

Each government seeks to determine which share of the profits falls within its taxing jurisdiction. The country where employees work points to the contribution of labour. The country hosting factories emphasises the importance of infrastructure and productive investment. The country where consumers are located may argue that its market contributes directly to value creation. Meanwhile, the jurisdiction holding intellectual property rights may receive a substantial share of the income generated through their exploitation.

These claims are not necessarily incompatible. They become problematic when they rely on different definitions of taxable economic value.

The difficulty therefore extends beyond the willingness of some companies to reduce their tax liabilities. It also arises from the coexistence of national systems that do not always assign the same value to the different components of economic activity.

The Founding Principle: Taxing Profits Where They Are Attributable

The international tax system has historically rested on a distinction between tax residence and the source of income. One country may tax a company because it is resident within its jurisdiction, while another may claim taxing rights over income generated by activities conducted on its territory.

Bilateral tax treaties seek to organise this coexistence. Their traditional objectives include preventing the same income from being taxed twice and allocating taxing rights between the jurisdictions concerned.

The concept of a permanent establishment plays a central role. When a foreign company maintains an economic presence meeting the applicable criteria, the host country can generally tax the profits attributable to that establishment, subject to domestic legislation and relevant treaties.

But this principle emerged in an economy where international business more frequently required an identifiable physical presence.

A digital platform can now serve millions of users in a country without maintaining a commercial infrastructure comparable to that of a traditional industrial company. A business can generate substantial revenues from software, data, brands or algorithms deployed simultaneously across multiple markets.

Economic presence and taxable presence no longer necessarily coincide.

This separation raises a question that remains central to international negotiations: should a country acquire taxing rights simply because consumers within its territory contribute to the revenues of a foreign corporation?

The answer still depends largely on domestic legislation, applicable treaties and specific mechanisms introduced by individual jurisdictions.

Transfer Pricing: The Invisible Machinery of Corporate Groups

Within multinational groups, subsidiaries continuously exchange goods, services, financing and intellectual property rights.

One subsidiary may purchase components from another, pay royalties for the use of a brand, compensate a group company for administrative services or borrow money from an affiliated financing entity.

These transactions are essential to the operation of international organisations. They also determine how accounting profits are distributed among countries.

The arm's length principle, established in the OECD Transfer Pricing Guidelines, requires transactions between associated enterprises to reflect conditions comparable to those that would have been agreed between independent businesses.

In theory, this mechanism is intended to prevent groups from artificially shifting profits by manipulating the prices of internal transactions.

In practice, its application can become exceptionally complex.

When a subsidiary sells a commodity traded on international markets, reference prices are often available to assess the transaction. But how should the market value of a proprietary algorithm, a unique technology or a brand developed through decades of investment be determined?

The problem becomes more complicated when different entities within the same group jointly contribute to value creation.

A technology may be developed in one country, financed from another, improved by international teams and commercially exploited across several continents. Attributing its profitability to a single entity then becomes difficult.

Transfer pricing rules attempt to address this challenge by examining the functions performed, assets employed and risks actually assumed. They do not, however, eliminate every valuation uncertainty.

Taxation consequently becomes a matter of economic classification as much as legal compliance.

Intellectual Property and the Mobility of Profits

Intangible assets account for a growing share of the value of international businesses.

Patents, software, trademarks, licences, databases and proprietary knowledge can generate substantial revenues without requiring a proportionate physical presence in the territories where those revenues arise.

This characteristic facilitates certain forms of international corporate structuring.

A group may centralise intellectual property ownership in a specialised entity and arrange for its exploitation by subsidiaries through licensing agreements. Royalty payments then become expenses for the operating entities and revenues for the company holding the rights.

Such arrangements are not inherently abusive. They may serve legitimate purposes involving management, legal protection or technological coordination.

They become subject to tax scrutiny when the allocation of profits does not correspond to the functions genuinely performed, the risks borne or the economic substance of the entities involved.

Tax authorities seek, in particular, to identify companies receiving significant income without possessing the personnel, expertise or economic responsibilities corresponding to that income.

Nevertheless, the presence of employees and genuine activities does not always settle the question of appropriate profit attribution.

The boundary between legitimate international organisation and artificial profit shifting may therefore become a matter of litigation rather than an obvious accounting distinction.

Debt, Interest and Tax Optimisation

Corporate financing structures represent another important mechanism.

When a company finances investment through borrowing, interest payments may be deductible from taxable income under certain conditions. Dividends distributed to shareholders generally do not receive equivalent treatment.

This asymmetry creates an incentive to use debt in some corporate structures.

Within multinational groups, intragroup financing can alter the distribution of financial expenses across jurisdictions. A subsidiary located in a high-tax country may incur interest expenses payable to an affiliated financing entity established elsewhere.

Interest deduction limitations, anti-abuse provisions and documentation requirements seek to regulate these arrangements.

But borrowing is not, in itself, evidence of tax avoidance. Companies use debt to finance growth, distribute risks and optimise their cost of capital.

The challenge is distinguishing economically justified financing from arrangements primarily designed to reduce the taxable base.

That distinction depends on contractual conditions, genuine repayment capacity, risk exposure and the rules applicable in each jurisdiction.

Tax Havens Are Only Part of the System

The expression “tax haven” often suggests isolated territories operating outside the normal structures of the global economy.

The reality is more complicated.

Differences in taxation exist among numerous jurisdictions fully integrated into international markets. They concern not only statutory tax rates but also exemptions, tax credits, intellectual property regimes, withholding taxes and bilateral tax treaties.

Two countries applying identical statutory corporate tax rates may produce substantially different effective tax burdens.

Conversely, a jurisdiction with a low headline rate may tax certain categories of income more heavily than a country with a higher statutory rate but generous targeted incentives.

It is also necessary to distinguish statutory tax rates, effective rates calculated under tax rules and the tax expense reported relative to accounting profits. These indicators do not measure precisely the same reality.

Tax competition therefore cannot be reduced to a race towards the lowest rate. It concerns the entire set of conditions offered to businesses seeking to locate investments, assets and strategic functions.

Such competition can encourage productive investment. It can also promote corporate arrangements whose fiscal advantages outweigh their contribution to the local economy.

This ambiguity is precisely what makes policies against tax-base erosion difficult to design.

The Global Minimum Tax: Reforming the Architecture

In response to these tensions, the OECD and G20 have gradually developed reforms intended to transform international corporate taxation.

The Base Erosion and Profit Shifting initiative, commonly known as BEPS, introduced a series of measures addressing transfer pricing, hybrid arrangements, financial expenses and transparency.

The second pillar of the international reform framework establishes a minimum effective taxation mechanism of 15% for multinational groups within its scope, generally those with consolidated annual revenues of at least €750 million, subject to applicable exclusions and conditions.

Its operation does not simply involve imposing a uniform 15% tax rate on every company.

Instead, it relies on a jurisdiction-by-jurisdiction calculation of effective taxation, adjustments to the relevant tax base and mechanisms for collecting additional tax when the applicable minimum level is not reached.

The framework also provides substance-based exclusions, notably linked to tangible assets and payroll, alongside specific rules and simplification measures.

The objective is to reduce the tax advantage associated with locating profits in low-tax jurisdictions.

But this reform does not eliminate differences between national systems or competition to attract capital.

It primarily changes the conditions under which that competition can take place.

Companies may continue to benefit from tax incentives, although their effects must be assessed under the applicable rules. Governments also retain considerable scope to compete through infrastructure, subsidies, education, regulation and production costs.

Tax competition does not disappear. It partly changes form.

The United States and the Limits of Convergence

International taxation remains closely connected to the distribution of economic power.

The United States occupies a distinctive position because of the global importance of its multinational corporations, particularly in technology, pharmaceuticals and finance, and because of its own rules governing the taxation of foreign income.

Debates over the interaction between these domestic provisions and international minimum taxation rules have exposed the difficulties of harmonising different legal systems and economic interests.

For Washington, competitiveness, fiscal sovereignty and the treatment of American multinational groups remain important considerations. For jurisdictions implementing international rules, the challenge is to preserve their taxing rights while avoiding conflicts with major economic partners.

International coordination therefore rests on compromises that may evolve.

Pillar One, which concerns the partial reallocation of taxing rights towards certain market jurisdictions, belongs to a separate negotiation. Its ambition differs from that of minimum taxation: the issue is no longer merely to limit low taxation, but to determine which countries are entitled to tax part of a multinational group's profits.

This distinction is essential.

A minimum tax can reduce certain forms of profit shifting without fully resolving the geographical allocation of taxable income.

Developing Countries and Structural Asymmetry

For developing economies, the fiscal stakes are particularly significant.

These countries frequently host extraction, manufacturing, distribution and service activities, while certain financial, technological and decision-making functions remain concentrated in other jurisdictions.

A corporation may therefore maintain a substantial industrial presence in one country while attributing a significant share of its profits to entities elsewhere, subject to applicable transfer pricing rules.

Tax administrations must then examine complex transactions, sometimes confronting corporate groups with considerable legal and financial resources.

The imbalance is not exclusively economic. It is also informational and administrative.

The ability to scrutinise intragroup contracts, value intangible assets or challenge financing structures requires specialised expertise, reliable data and effective international cooperation.

Country-by-country reporting mechanisms improve visibility over the distribution of activities, profits and taxes. Their effectiveness, however, depends on access to information, data quality and the institutional capacity to interpret the findings.

An international reform may consequently produce different outcomes depending on the administrative capabilities of individual countries.

The central issue becomes effective access to taxing rights, rather than their formal recognition in international agreements.

Transparency Does Not Eliminate Grey Areas

Reporting obligations have expanded considerably.

Multinational groups within the relevant scope must provide competent tax authorities with information about their activities across different jurisdictions. Some regulations also require public disclosures.

These developments make it easier to identify discrepancies between the geographical location of profits and certain indicators of genuine economic activity.

They do not, however, automatically establish the existence of fraud or abuse.

High profits recorded in a jurisdiction employing relatively few people may reflect ownership of valuable assets, financial functions or other legitimate economic characteristics. They may also indicate a questionable tax structure.

Proper analysis therefore requires an understanding of income sources, assumed risks, deployed assets and applicable legal rules.

There is also a more fundamental limitation: tax data, even when increasingly accessible, describe accounting and legal outcomes that do not always correspond directly to economic value creation.

Transparency improves oversight. It does not replace economic judgement.

Who Should Receive the Tax Revenue?

Behind the technical mechanisms lies a distributive question.

When an international corporation generates profits through a combination of research, financing, production, marketing and consumption, which jurisdiction should receive the corresponding tax revenues?

The country where the inventions were developed? The one where capital was invested? The country where goods are manufactured? The one where customers are located? Or the jurisdiction where management makes strategic decisions?

Existing rules attempt to allocate profits through identifiable legal entities, economic functions and transactions.

Alternative approaches propose treating the multinational group more explicitly as a single economic unit before distributing a consolidated tax base according to criteria such as sales, employment or assets.

Such a method could reduce certain opportunities for accounting-driven profit shifting. It would nevertheless introduce new trade-offs: the selection of allocation factors would benefit producing countries, consumer markets and headquarters jurisdictions differently.

No allocation formula would be entirely neutral.

International taxation is therefore not merely a search for accounting precision. It also involves decisions about the distribution of public resources among sovereign states.

The Next Tax Frontier

Artificial intelligence, digital platforms and the growing concentration of intangible assets are making these questions even more complex.

A company can develop a technological model in one jurisdiction, train its systems using computing infrastructure distributed across several countries and commercialise its services globally.

Its profits may depend simultaneously on research, data, computing power, market access and intellectual property.

The fiscal location of this value does not automatically follow the physical location of servers or users.

Tax administrations will also have to account for increasingly integrated corporate structures in which strategic functions are distributed across multiple entities and territories.

As production becomes less dependent on a single geographical location, traditional criteria for attributing profits face growing pressure.

International rules may evolve, but they will continue to balance three objectives that are difficult to reconcile perfectly: preventing double taxation, limiting artificial profit shifting and preserving national taxing rights.

Sovereignty Under Interdependence

Multinational taxation ultimately illustrates a broader transformation of economic sovereignty.

Governments retain the authority to define their taxes, but the exercise of that authority increasingly depends on decisions taken elsewhere. A change in American tax legislation can affect the strategies of corporations operating across several continents. A European reform can alter the relative attractiveness of certain jurisdictions. An international rule can limit the benefits of a national tax incentive.

This interdependence does not mean that fiscal sovereignty has disappeared. It changes the conditions under which sovereignty can be exercised.

The global minimum tax represents an attempt at coordination, not the completion of a unified international tax system. Transfer pricing remains complex, tax treaties continue to allocate taxing rights, and companies retain lawful opportunities to organise their activities and financing.

The underlying challenge therefore extends beyond the search for a common tax rate.

It is to determine how the tax revenues of an economy whose value creation has become international should be distributed, without a global fiscal authority capable of imposing a single definition of that value.

Globalisation has progressively erased the boundaries of the corporation. It has not erased those of taxation. Between the two, the grey areas are not merely imperfections in the system: they are also the product of the compromises on which it rests.

Principal Sources

  • OECD, Corporate Tax Statistics 2026, July 2026.
  • OECD, OECD Transfer Pricing Guidelines for Multinational Enterprises and Tax Administrations, 2022.
  • OECD/G20, Base Erosion and Profit Shifting (BEPS), institutional reports and documentation.
  • OECD, Global Anti-Base Erosion Model Rules (Pillar Two), model rules and administrative guidance.
  • OECD, Global Minimum Tax Implementation Toolkit, April 2026.
  • OECD, documentation on country-by-country reporting and international tax transparency mechanisms.

National legislation, bilateral treaties and the implementation of international tax reforms differ across jurisdictions. The mechanisms discussed provide a general analytical framework and do not determine the tax treatment of any particular corporation.