Corporate tax avoidance undermines public services, increases inequality, and shifts the financial burden to workers. Luxembourg, a major hub for multinational profit shifting and part of the “axis of tax avoidance,” exemplifies the challenges of curbing harmful tax practices. As the dominance of financial activities deepens socioeconomic disparities, Luxembourg’s current model may primarily benefit a privileged few. A major beneficiary from the G20/OECD global tax deal in the short run, Luxembourg’s model is likely to be increasingly challenged by tax justice campaigns across the world. Global labour movements are advancing calls for fairer corporate tax practices, including unitary taxation, raising minimum tax rates, and promoting greater transparency. Recent wins show that progress is possible, even if incremental. Engaging a reflection on Luxembourg’s long-term economic future is therefore crucial.

Why Corporate Taxation Matters for Workers

Corporate taxation is essential for funding public services, promoting fairness, and ensuring economic justice. When multinational corporations (MNEs) reduce their tax contributions through complex tax arrangements, governments face difficult choices—such as finding alternative revenue sources or cutting essential services. This can lead to greater pressure on individual taxpayers and public budgets, making it harder to maintain the quality of services that workers and their families depend on.

The implications for workers are significant. Reduced public revenues can translate into underfunded services, such as healthcare and education, or higher indirect taxes that disproportionately affect lower-income households. These challenges are shared across many countries, highlighting the importance of ensuring that corporate taxes reflect real economic activity and contribute to society.

For the labour movement, advocating for fair corporate taxation is about protecting the economic security and well-being of workers. Stronger corporate accountability and fair tax practices can help ensure that public services remain well-funded and accessible to all, contributing to a more equitable and sustainable economy.

The scale of tax losses

The scale of global tax abuse is staggering, with $492 billion lost annually. Two-thirds ($347.6 billion) is attributed to multinational corporations shifting profits offshore, while the remaining one-third ($144.8 billion) is lost to wealthy individuals hiding their wealth in offshore accounts. These practices drain governments of resources needed to fund public services and exacerbate inequality worldwide.

The latest State of Tax Justice report highlights the disproportionate impact on public health budgets. On average, higher-income countries lose taxes equivalent to around 7% of their public health budgets annually, while developing nations face even greater proportional losses, given their higher reliance on corporate tax revenues.

Luxembourg’s role as part of the “axis of tax avoidance,” alongside the UK, the Netherlands, and Switzerland, exemplifies the global challenge. Luxembourg attracts $36.8 billion in shifted profits annually but experiences a yearly outward flow of $83 billion in shifted profits. The net result is an annual tax loss of $20.7 billion—equivalent to more than seven times its education spending and over four times its health spending.

The OECD’s Pillar Two and Luxembourg’s response

Faced with the prospect of ever-increasing tax avoidance due to the growing digitalisation of the economy, and in the wake of the pandemic, which placed a huge strain on public budgets, the G20 endorsed a global tax deal in 2021. Negotiated within the OECD headquarters, this deal comprises two pillars: Pillar One, which seeks to introduce an additional taxing right on the largest and most profitable MNEs, and Pillar Two, which establishes a global minimum tax, a measure of particular relevance to Luxembourg.

Pillar Two sets a global minimum effective corporate tax rate of 15%. It allows jurisdictions to impose a “top-up” tax on profits taxed below this threshold in other countries. Pillar Two marks some progress, notably the belated recognition that corporate tax competition should be curbed. However, several weaknesses and concessions to corporate lobbies and low tax countries undermine its effectiveness.

At 15%, the minimum rate falls significantly below the global average effective tax rate of 21%–25%, leaving room for tax avoidance. Revenue raising prospects are further limited through various carve-outs which reduce the tax base. Most importantly for Luxembourg, the OECD has introduced a so called “qualified domestic minimum top up tax” (QDMTT). Countries which decide to implement this option are the first ones entitled to collect the 15% on undertaxed profits worldwide, before the country of headquarters.

In simple terms, an MNE that books its profits in a tax haven—despite having little to no workforce or assets there—can continue to do so. The tax haven would raise its effective tax rate close to 15%, but only on the portion of profits included in the Pillar Two calculations, while keeping very low rates for the rest. If it did not raise the rate to 15%, the headquarter country could impose the top-up tax itself. To maintain its attractiveness, the tax haven would then introduce creative tax incentives that fall outside the scope of Pillar Two, effectively reimbursing the tax paid.

Labour movements have strongly advocated in favour of a global minimum tax which should be set at 25%, a level that aligns with the global average effective tax rate and could generate significantly higher revenues. Furthermore, the very design of Pillar Two is flawed because it continues to rely on the existing weaknesses of the international tax system. Rather than allowing MNEs broad discretion in where to book their profits, profits (and thus taxing rights) should be allocated to countries in proportion to real economic activities. This should be measured using objective indicators such as workforce presence, assets and actual sales. For a global minimum tax to be truly effective, the current transfer pricing system must be eliminated and be replaced with a unitary taxation approach.

Luxembourg’s Disproportionate Gains—and Why That’s a Problem

The European Union transposed the OECD model rules into a European Directive in December 2022, requiring member states to implement the global minimum tax by the end of 2023. Luxembourg acted swiftly, incorporating the QDMTT into national law by December 2023. As a result, Luxembourg can levy a 15% top-up tax, ensuring that these revenues remain within the country rather than being claimed by other jurisdictions.

According to the EU Tax Observatory, Luxembourg could collect up to €12.5 billion annually through the QDMTT, far more than most other EU countries.  To put this into context, Germany, despite having a far larger economy, is estimated to collect only €5.5 billion under the QDMTT. France would collect just €200 million, while the Netherlands, another key tax hub, stands to gain €14.1 billion—close to Luxembourg’s figure but still exceptional compared to most other countries.

Luxembourg benefits disproportionately due to its role as a recipient of vast corporate profits—far exceeding those of countries like Germany or France, despite them actually hosting MNE headquarters. The QDMTT enables Luxembourg to collect top-up taxes on this foreign investment, even though it generates little real economic activity within the country.

Rather than incentivising long-term investment or job creation, the current Pillar Two model reinforces Luxembourg’s financialised economy, where profits flow in on paper but do not translate into tangible benefits for local workers or the broader economy.

Luxembourg’s ability to benefit so disproportionately from the QDMTT is not coincidental. It reflects the country’s long-standing tax strategy of keeping effective tax rates well below the statutory rate through targeted incentives and deductions.

Luxembourg’s falling statutory and effective tax rates

Luxembourg’s corporate income tax (CIT) rates have been steadily declining over the past two decades. This reduction in nominal corporate tax rates is part of a longer trend that began in the early 2000s. Between 2000 and 2019, the top nominal corporate tax rate fell from 37.45% to 24.95%, and it further declined to 23.87% by 2025. By 2025, the maximum CIT rate is expected to reach 16%, while the minimum rate will fall to 14%, further narrowing the tax base.

The falling statutory rates reflect Luxembourg’s effort to maintain its competitive edge as a business-friendly jurisdiction. However, estimates suggest that Luxembourg’s effective tax rate (ETR)—the rate companies actually pay after deductions and exemptions—remains significantly below both its statutory rates and the EU average. Recent estimates place Luxembourg’s ETR between 17-18%.

The decline in CIT rates is not just a nominal adjustment. Luxembourg’s CIT revenues as a percentage of GDP have also dropped, declining from around 8% in the early 2000s to approximately 4.75% in recent years. This decrease is driven not only by lower nominal rates but also by extensive tax incentives that erode the tax base.

These mechanisms include deductions for intra-group financing, preferential tax treatment for intellectual property income, and participation exemptions on capital gains and dividends.

The introduction of Pillar Two will not eliminate these advantages. Luxembourg is likely to continue using compliant strategies—such as R&D tax credits and sector-specific subsidies—to maintain attractiveness without breaching the OECD’s model rules.

This persistent gap between statutory and effective tax rates underscores a critical issue: while Luxembourg remains attractive to global corporations, it limits its own ability to fund public services. The lost revenue could otherwise be directed toward healthcare, education, and infrastructure, which are vital for the country’s long-term social and economic well-being.

Meanwhile, taxes on labour income in Luxembourg have moved in the opposite direction. Between 2000 and 2023, the tax burden on wages—taking into account personal income tax and social security contributions—rose from 35.8% to 41.3% of total labour costs, making Luxembourg one of the highest-taxed countries for labour in the OECD. By 2023, an average single worker retained only 66.8% of their gross wages after taxes and benefits, compared to the OECD average of 75.1%.

Ways countries can work around Pillar 2 rules

This reliance on maintaining low effective tax rates is not unique to Luxembourg. Across the globe, other countries are already adopting similar strategies that comply with Pillar Two’s rules while ensuring corporations continue to enjoy reduced tax burdens.

Ireland has positioned itself as a global hub for tech and pharmaceutical companies through its R&D tax credit system, which allows companies to significantly lower their tax liabilities. Refundable tax credits, such as Ireland’s R&D credits and the UK’s Research and Development Expenditure Credit (RDEC), are fully compliant with Pillar Two and can even result in cash refunds for qualifying companies.

The Netherlands and Switzerland focus more on direct subsidies and grants, particularly for sectors such as green energy, biotechnology, and financial services. These subsidies mirror the effects of tax incentives without technically falling within Pillar Two’s scope.

Barbados has introduced a Qualified Job Credit that allows companies in fintech, wholesale distribution, and R&D sectors to claim refundable payroll tax credits of up to 300% of payroll costs. In addition, a 50% R&D tax credit further reduces taxable profits. These credits enable companies to significantly lower their tax liabilities while remaining compliant with Pillar Two.

Given its history of flexibility in adapting tax rules (doing so again at the close of 2024), Luxembourg could easily adopt similar strategies in the future, introducing new incentives that align with Pillar Two’s requirements while preserving its competitive advantage.

The limits of Luxembourg’s tax model for workers and economic justice

Luxembourg’s tax model prioritises financial transactions over real economic activity, which has profound implications for workers and the broader economy. Approximately 95% of foreign investments in Luxembourg flow through entities focused on holding or intra-group financing activities. These financial flows do little to generate substantial local employment or drive productive investment. While the financial sector accounts for nearly 30% of Luxembourg’s GDP, it provides only 11% of total employment, reflecting a stark disconnect between economic output and job creation.

The dominance of financial activities also exacerbates socioeconomic disparities. High salaries in the financial sector contribute to a housing market that is increasingly unaffordable for lower-income households, deepening inequality.

This financialisation of Luxembourg’s economy has broader implications. The gap between the country’s GDP and Gross National Income (GNI), estimated at 30% of GDP, reflects the extent to which wealth generated within Luxembourg is extracted by multinational enterprises and repatriated to other jurisdictions. This gap highlights that while Luxembourg benefits from inflows of foreign investment and financial transactions, these do not translate into local economic activity, jobs, or public revenues. Instead, much of the economic value created in Luxembourg bypasses its local economy, leaving residents with limited benefits.

The international taxation landscape: A turning point for Luxembourg

The international tax landscape is shifting rapidly, with upcoming reforms that promise to transform how multinational corporations (MNEs) are taxed. These changes will fundamentally challenge the tax models of financial hubs like Luxembourg, which have long relied on fragmented rules and complex intra-group pricing structures to attract multinational subsidiaries.

Proposals for Unitary Taxation are at the forefront of this change. This shift is unavoidable in the long run. It will eliminate the opportunity for profit shifting to tax havens and represent a groundbreaking step toward fairer global taxation.

Several recent initiatives reflect this movement toward unitary taxation. At the European level, the Common Consolidated Corporate Tax Base (CCCTB)—now evolved into BEFIT (Business in Europe: Framework for Income Taxation)—proposes a single European tax base for corporations, allocating profits to member states based on apportionment factors like sales and employment. The OECD’s Pillar One also incorporates elements of unitary taxation, especially for the world’s largest and most profitable firms.

For countries like Luxembourg, these reforms could have a disproportionate impact, given the country’s reliance on financial services and its role as a host to multinational subsidiaries with limited real economic activity. A recent IMF assessment found that Luxembourg could lose up to 70% of its tax revenue from U.S.-based MNEs if global formulary apportionment were adopted. The European Commission’s impact assessment of the CCCTB also predicted significant economic disruption, with Luxembourg’s welfare falling by 0.6% to 1% of GDP, driven by the relocation of jobs and tangible assets to jurisdictions with lower tax rates.

Simultaneously, the push for greater corporate tax transparency is gaining momentum. The European Union’s public Country-by-Country Reporting (CbCR) directive, effective from 2024, requires MNEs with consolidated revenues exceeding €750 million to disclose key financial data—such as revenues, profits, and taxes paid—by jurisdiction.

Outside the EU, Australia’s CbCR regime is one of the most advanced. It applies to MNEs with global incomes above AU$1 billion and includes an “approach to tax” statement, forcing companies to reveal their tax strategies in addition to financial disclosures. By setting such high transparency standards, Australia’s framework is a global model for reform, raising the bar for other jurisdictions.

These transparency measures are expected to expose profit-shifting practices, deter aggressive tax planning, and raise significant reputational risks for companies that continue to exploit tax havens like Luxembourg. Increased public scrutiny could also lead to a decline in foreign direct investment (FDI), accelerating the need for Luxembourg to rethink its economic strategy.

Without meaningful reforms, Luxembourg’s model risks perpetuating a cycle in which corporate profits thrive at the expense of equitable economic development. Strengthening accountability mechanisms and redirecting incentives toward sectors that create quality jobs and contribute to the real economy are critical to breaking this cycle. For unions and advocates of economic justice, this presents a clear opportunity to push for policies that prioritise people over profits, ensuring that Luxembourg’s economic gains translate into shared prosperity.

Labour movement next steps: Global progress, local impact

Luxembourg’s unions benefit from strong institutional frameworks and significant collective bargaining coverage, but as Adrien Thomas notes, they have yet to develop a critical perspective on the country’s role as a global financial center and its involvement in enabling aggressive tax practices. However, the tools and frameworks now emerging—such as public Country-by-Country Reporting (pCbCR) and the proposed UN Framework Convention on International Tax Cooperation—offer a transformative opportunity for unions to engage more actively in tax policy advocacy and help shape a more equitable economic model.

Global labour movements are advancing calls for fairer corporate tax practices, including unitary taxation, raising minimum tax rates, and promoting greater transparency. Recent wins, such as the EU’s and Australian pCbCR regulations, show that progress is possible, even if incremental. For Luxembourg’s unions, this evolving global landscape presents a unique opportunity to build alliances with international networks like the Network of Unions for Tax Justice. These partnerships offer shared resources, data, and expertise, helping unions challenge corporate practices, uncover profit-shifting strategies, and demand greater accountability from multinational enterprises (MNEs).

Engaging in this reflection on Luxembourg’s long-term economic future is crucial. Moving toward a sustainable economic model that attracts real investment and prioritises local job creation—rather than financial flows—would make the country’s economy more resilient and ensure that workers truly benefit from its prosperity.