OECD Pillar Two and HNW Business Owners: What Actually Changes

The Global Minimum Tax (GMT) under OECD Pillar Two primarily impacts High-Net-Worth (HNW) business owners who control large multinational enterprises (MNEs) with annual revenues exceeding €750 million. While the 15 per cent minimum tax rate is designed for corporate entities, it indirectly alters the efficacy of traditional tax planning, holding company jurisdictions, and wealth structures used by private families and their investment vehicles. Private groups below the revenue threshold remain largely exempt from the direct GloBE rules but should prepare for secondary legislative shifts in low-tax jurisdictions.

Key takeaways

• Revenue Threshold: Only groups with consolidated annual revenue of at least €750 million in two of the four preceding years are directly within the scope of the 15 per cent minimum tax.
• Investment Entity Exceptions: Specific exclusions apply to purely sovereign wealth funds, pension funds, and certain investment funds, though private family offices often fall into a grey area.
• The Top-Up Mechanism: If an entity’s effective tax rate (ETR) in a specific jurisdiction falls below 15 per cent, the home country or another participating territory can levy a "Top-Up Tax" to bridge the gap.
• Erosion of Incentives: Pillar Two significantly reduces the value of corporate tax holidays and specific patent box regimes in traditional midshore and offshore hubs.
• Compliance Burden: Even for business owners whose groups are currently under the threshold, the data gathering requirements for permanent establishment monitoring are increasing globally.

What is the core objective of OECD Pillar Two?

OECD Pillar Two is a central component of the Global Anti-Base Erosion (GloBE) rules. The initiative aims to ensure that multinational enterprises pay a minimum effective tax rate of 15 per cent on profits arising in each jurisdiction where they operate. For HNW business owners, this marks the end of an era where tax competition between nations allowed for "race to the bottom" corporate rates. The Organisation for Economic Co-operation and Development (OECD) estimates that this framework will generate approximately $150 billion in additional global tax revenues annually. For the international investor, this signifies a shift from tax-centric structuring to substance-centric operations.

How does the €750 million threshold affect private families?

The €750 million revenue threshold is the definitive line in the sand. Most family-owned businesses and mid-market enterprises fall well below this mark. However, HNW individuals must be cautious about how revenue is consolidated. Under International Financial Reporting Standards (IFRS) or other acceptable GAAP, if a family office or a patriarch/matriarch is deemed to be at the top of a consolidated group that exceeds the limit, the entire structure becomes caught in the net. Many HNW groups operate diverse portfolios across real estate, manufacturing, and private equity; if these are consolidated under a single parent entity, the threshold is more easily breached than many owners realise.

Are investment funds and family offices exempt?

The GloBE rules provide specific exclusions for "Investment Entities" and "Pension Funds." However, the definition of an investment entity is strict. It generally requires the entity to be designed to invest funds for a pool of investors and be subject to regulation. Many private family offices, which manage the wealth of a single family, may not meet the "regulated" or "pooled" criteria. If the family office is the Ultimate Parent Entity (UPE) of a trading group, it may find itself responsible for the compliance and payment of Top-Up Taxes. Professional advice from qualified tax practitioners is essential to determine whether a private investment vehicle qualifies for these carve-outs.

Which jurisdictions are changing their laws?

Traditionally low-tax jurisdictions such as the United Arab Emirates, Bermuda, and the Cayman Islands have had to adapt. The UAE, for example, introduced a 9 per cent corporate tax in 2023, partly in response to the global shifting tide. Bermuda recently legislated a 15 per cent corporate income tax for those entities in scope of Pillar Two. This means that HNW owners who previously used these jurisdictions for tax neutrality may find that the corporate layer now carries a tax cost, even if the individual remains untaxed at the personal level.

Comparison Table: Traditional Hubs vs. Pillar Two Realities

What happens to tax incentives and patent boxes?

One of the most significant changes for HNW business owners is the dilution of tax incentives. Many countries offered reduced rates for research and development (R&D) or intellectual property (IP) income. Under Pillar Two, if these incentives push the Effective Tax Rate (ETR) below 15 per cent, a Top-Up Tax is triggered elsewhere in the group. This renders the local incentive moot. Consequently, we are seeing a global shift where countries are replacing tax credits with "Qualified Refundable Tax Credits" (QRTCs), which are treated as income rather than a reduction in tax, thus helping to maintain the ETR above the 15 per cent threshold.

Does this impact personal income tax or wealth tax?

It is vital to distinguish between corporate and personal taxation. OECD Pillar Two is specifically a corporate tax measure. It does not directly impose a 15 per cent tax on personal income, capital gains for individuals, or wealth. However, the indirect impact is profound. If a HNW individual's wealth is primarily held within a corporate structure that is now paying 15 per cent tax instead of 0 per cent, the net yield available for distribution or reinvestment is reduced. Furthermore, tax authorities are using the increased transparency required by Pillar Two to better map the global assets of HNW individuals.

How should business owners prepare for 2025?

Preparation begins with a "Pillar Two Impact Assessment." Business owners should work with their CFOs to calculate the potential ETR across all operating jurisdictions. If the group is near the €750 million threshold, they must prepare for the "Inclusion Rule" (IIR) and the "Undertaxed Profits Rule" (UTPR). Even if the group is well below the threshold, they should monitor the "Pillar Two-Like" domestic taxes that many countries are implementing for all companies, regardless of size, to simplify their national tax codes.

The role of substance and economic activity

Pillar Two allows for a "Substance Based Income Exclusion" (SBIE). This allows a certain amount of profit to be exempt from the Top-Up Tax based on the value of tangible assets and payroll costs in a jurisdiction. For HNW business owners, this reinforces the need for genuine economic substance. Strategies that rely on "letterbox" companies with no employees or physical offices are increasingly precarious. The focus must shift to where the value is created, where the people are located, and where the physical assets reside.

Conclusion: A new era of tax compliance

The OECD Pillar Two framework represents the most significant shift in international taxation in a generation. For HNW business owners, the complexity of the global landscape has increased exponentially. While the €750 million threshold provides a buffer for many, the ripple effects on local tax laws, the efficacy of incentives, and the transparency of global structures cannot be ignored. Wealth preservation in this new era requires a proactive approach, moving away from aggressive tax planning toward a model based on transparency, substance, and long-term regulatory alignment.

Frequently Asked Questions

1. Does Pillar Two apply to me if my business makes €50 million? Directly, no. The GloBE rules apply to groups with revenues over €750 million. However, you may be indirectly affected if the countries where you operate raise their domestic corporate tax rates to the 15 per cent minimum for all businesses.

2. Will my UAE company have to pay 15 per cent tax? If your group meets the €750 million threshold, the UAE has indicated it will implement a top-up tax to reach 15 per cent. For smaller businesses, the standard UAE corporate tax rate of 9 per cent usually applies to taxable income exceeding AED 375,000.

3. Is a family trust considered a 'Multinational Enterprise'? If the trust holds interests in various companies across different borders and those companies are consolidated under accounting rules, it can be viewed as an MNE group for Pillar Two purposes.

4. What is the difference between Pillar One and Pillar Two? Pillar One focuses on the reallocation of taxing rights for the world's largest and most profitable companies (mostly big tech) based on where their customers are located, whereas Pillar Two focuses on a global minimum tax rate of 15 per cent.

5. Should I move my holding company to a different jurisdiction? Arbitrage based purely on a 0 per cent tax rate is becoming less effective. Moving a company should be based on commercial factors, such as access to capital, treaty networks, and the ability to demonstrate economic substance, rather than just the nominal tax rate.

Disclaimer: This article is provided for informational purposes only and does not constitute legal, financial, or tax advice. Readers should consult with a qualified professional advisor regarding their specific circumstances and the impact of OECD Pillar Two on their business or personal wealth structures.