Candice Horbacz
As the Persian Gulf conflict pushes energy prices higher, concerns are rising that global economic growth will slow or stall, requiring policymakers to maintain current economic momentum without worsening public indebtedness. Indeed, many advanced economies already face daunting levels of debt and will need robust growth, fueled by higher innovation and productivity, to offset the strains of aging populations, generous old-age benefits, and increased defense spending amid increased geopolitical hostilities. As such, there is a premium on fine-tuning tax systems to generate revenues efficiently with minimal economic damage. Recent research points to corporate tax reform as most promising in this regard.
A Volatile Global Economic Landscape
The current global economic outlook is shadowed by a confluence of significant challenges, primarily the escalating Persian Gulf conflict and its reverberations across energy markets. The immediate consequence has been a noticeable surge in crude oil prices, impacting everything from manufacturing costs and transportation logistics to consumer purchasing power. This spike in energy costs acts as a potent inflationary force, eroding real incomes and dampening consumer and business confidence worldwide. Beyond the direct impact on oil, the conflict introduces significant geopolitical instability, disrupting crucial shipping lanes, raising insurance premiums for maritime trade, and creating an environment of uncertainty that discourages long-term investment.
This geopolitical turbulence arrives at a time when many advanced economies are already grappling with unprecedented levels of public debt. The fiscal largesse deployed during the COVID-19 pandemic, coupled with pre-existing demographic pressures, has swelled national balance sheets. Governments worldwide poured trillions into stimulus packages, unemployment benefits, and healthcare support, leading to debt-to-GDP ratios that, in some cases, exceed those seen in post-World War II eras. For instance, countries like Japan, Italy, and the United States have public debt levels significantly above 100% of their GDP, leaving limited fiscal space for future crises or necessary public investments.
Moreover, the demographic shift towards aging populations in many developed nations presents a structural drain on public finances. As birth rates decline and life expectancies increase, the ratio of retirees to active workers grows, placing immense pressure on social security systems, pension funds, and healthcare services. These "generous old-age benefits," while crucial for social welfare, become increasingly difficult to fund without robust economic growth and a healthy tax base. Simultaneously, an increasingly fragmented and hostile global environment necessitates increased defense spending, further straining national budgets already under pressure. This combination of factors underscores the urgent need for sustainable economic growth and efficient revenue generation.
OECD Sounds Alarm: Slower Growth Ahead
The Organization for Economic Co-operation and Development (OECD) recently underscored these concerns in its June economic projection, forecasting a significant slowdown in global GDP growth for the current year and the next. The primary culprits identified are the aforementioned higher energy prices and the broad disruptions stemming from the Gulf conflict. These negative forces are expected to largely offset what would otherwise be strong growth in investment and trade, particularly those related to the burgeoning field of artificial intelligence (AI). While AI-driven innovation promises long-term productivity gains and new economic opportunities, its immediate impact is not sufficient to counteract the pervasive headwinds.
The OECD’s analysis presents a range of growth scenarios, heavily dependent on the duration and intensity of the conflict. Global GDP growth is projected to range from a conservative 2.1 percent to a more optimistic 2.8 percent this year. For the following year, projections narrow slightly, ranging from 1.8 percent to 3.1 percent, a notable deceleration compared to the 3.4 percent growth recorded in 2025 (likely a typo in original, meant previous year, assuming 2024). In a worst-case scenario, which envisions a prolonged and intensified conflict, several economies are anticipated to tip into recession. A recession, defined as a significant and sustained decline in economic activity typically lasting longer than six months, would trigger a cascade of negative effects: governments would see their tax revenues plummet due to reduced economic activity and higher unemployment, while simultaneously being forced to increase spending on social safety nets and stimulus measures, inevitably pushing them deeper into debt.
Regional Divergence: The US Outperforms
Amidst this generally subdued global outlook, the United States is projected to demonstrate greater resilience, outpacing the average growth rates for OECD countries throughout the projection period. In the more optimistic scenario, where the Gulf conflict finds a swift resolution, the US economy is forecast to grow by 2 percent this year and 1.8 percent next year. This performance stands in stark contrast to other major economic blocs. The Euro area, for instance, is projected to achieve only 0.8 percent growth this year and 1.2 percent next year, reflecting its higher dependence on imported energy and closer proximity to geopolitical flashpoints. Japan, another significant economy, faces even slower growth, with projections of 0.6 percent this year and 0.8 percent next year, burdened by its own demographic challenges and export-oriented economy vulnerable to global trade disruptions. The relative strength of the US economy can be attributed to factors such as its robust domestic demand, a dynamic technology sector driving AI-related investments, and a degree of energy independence that somewhat cushions it from global oil price shocks.
OECD’s Prescription: Strengthening Growth and Fiscal Sustainability
Recognizing the precarious macroeconomic environment and the unprecedented fiscal challenges confronting many nations, the OECD has issued a clear call to action for policymakers: aim to simultaneously strengthen economic growth and fiscal sustainability. On the growth front, the organization emphasizes the critical need to "ensure that market incentives are in place that encourage firms and households to channel resources to their most productive uses." This principle underscores the importance of policies that foster efficiency, innovation, and optimal resource allocation rather than creating distortions or disincentives.
Several country-specific recommendations provided by the OECD directly address tax and trade policy. These include improving the efficiency of tax systems by broadening the tax base and reducing tax expenditures. A broad tax base means that more economic activities or income sources are subject to taxation, allowing governments to raise sufficient revenue at lower rates, thereby minimizing distortions and administrative costs. Conversely, tax expenditures (e.g., specific deductions, credits, or exemptions) narrow the tax base, often favoring certain activities or groups, which can lead to inefficiencies and complexity. Other key recommendations involve reducing the labor tax wedge – the difference between the total labor costs to the employer and the employee’s net take-home pay – which can incentivize employment and boost labor market participation. Reforming research and development (R&D) tax credits to ensure they effectively stimulate genuine innovation, reducing tariffs and non-tariff barriers to trade, and promoting rules-based open markets alongside openness to foreign direct investment are also highlighted as crucial steps to enhance competitiveness and growth.
The Tax Foundation’s Insights: Corporate Tax Reform as a Catalyst
While the OECD’s recommendations are undoubtedly sensible and high-level, a recent study by Tax Foundation Europe economists offers policymakers complementary, actionable advice on where to concentrate tax reforms for maximum impact on economic growth. This study provides a granular analysis, moving beyond general principles to identify specific levers within tax systems.
The research leverages the Tax Foundation’s International Tax Competitiveness Index (ITCI), an annual ranking system that meticulously measures the efficiency and competitiveness of tax systems across OECD and other major economies. The ITCI assesses how well a country’s tax code promotes long-term capital formation and economic growth by analyzing over 40 distinct tax policy variables across five main categories: corporate taxes, individual income taxes, consumption taxes, property taxes, and international tax rules. A higher ITCI score signifies a tax system that is simpler, more neutral (i.e., minimally distorts economic decisions), and more conducive to investment and economic activity.
The study’s pivotal finding is that more competitive tax systems, as quantified by the ITCI, are demonstrably associated with faster economic growth. Crucially, the corporate tax component of the ITCI emerges as the primary driver of these results. This is a significant insight because, while corporate income taxes typically generate a relatively smaller share of government revenues compared to individual income taxes, payroll taxes, or consumption taxes, they exert an outsized effect on economic growth. This disproportionate impact stems from the corporate tax’s direct influence on business investment decisions, capital allocation, innovation incentives, and ultimately, a country’s long-term productive capacity.
Corporate Tax: A Powerful Lever for Growth
According to the Tax Foundation study, even a modest improvement in a country’s corporate tax score can yield substantial economic benefits. Specifically, an improvement by one standard deviation in the corporate category score (equivalent to 14.3 points on the ITCI’s 100-point scale) translates into roughly 1 percentage point higher annual GDP per capita growth. Over a three-year period, this translates to a cumulative 2.29 percentage points of additional growth. To contextualize these figures, consider the 2025 ITCI rankings for corporate tax competitiveness: France ranks last among the surveyed countries with a notably low corporate score of 28.5 points, reflecting a highly complex and burdensome corporate tax regime. In stark contrast, Latvia leads with a perfect score of 100 points, primarily due to its unique system of taxing corporate profits only upon distribution, effectively making retained earnings tax-free. The United States, having undergone significant reforms, ranks 9th with a corporate score of 71 points. Germany stands at 30th with 54.3 points (16.7 points behind the US), and Japan ranks 35th with 48 points (23 points behind the US), highlighting considerable room for improvement in these major economies.
The study’s methodology goes beyond merely examining corporate tax rates, a common focus in many analyses. While a lower corporate tax rate is generally acknowledged to boost investment and growth, the Tax Foundation’s research delves deeper, accounting for the entire structure and base of the corporate tax system in each country. Tax systems are scored higher based on their simplicity, neutrality, and broad-based support for investment.
The ITCI breaks down the corporate income tax category into three critical subcategories:
- Top Marginal Corporate Income Tax Rate: This is the headline rate businesses pay on their highest tier of taxable income. While often the most visible aspect, its impact is intertwined with other structural elements. High rates can deter investment and encourage profit shifting.
- Cost Recovery: This subcategory assesses how the tax system allows businesses to recover the cost of investments through deductions like depreciation or amortization. Ideal cost recovery involves "full expensing," which permits businesses to deduct the entire cost of an investment in the year it is made. This significantly reduces the cost of capital and incentivizes immediate investment. Less competitive systems require "depreciation," where deductions are spread out over several years, diminishing their present value and disincentivizing investment. This category also considers loss offset rules (how businesses can use losses to reduce future taxable income) and the tax treatment of inventory. The US, for example, ranks third globally in cost recovery, largely due to expensing provisions introduced in last year’s One Big Beautiful Bill Act (OBBBA), which allows for the immediate deduction of certain capital expenditures.
- Incentives and Complexity: This subcategory evaluates specific tax provisions that can either enhance or detract from competitiveness. Positive features might include well-designed R&D credits that genuinely foster innovation. However, the score is reduced by features that introduce complexity or create distortions, such as "patent boxes" (preferential tax rates on income derived from patents), poorly structured R&D credits, digital service taxes (which often target specific industries and create international friction), surtaxes, and other separate or special rates that complicate the tax code. The US ranks 12th in this area, indicating some room for streamlining and better design of its incentives.
Global Tax Policy Shifts and Their Impact
The United States has demonstrated a tangible commitment to enhancing its corporate tax competitiveness through significant legislative changes. The 2017 Tax Cuts and Jobs Act (TCJA) notably reduced the federal corporate income tax rate from 35% – which was among the highest in the OECD – to a more competitive 21%. This move shifted the US corporate tax rate to a middle-of-the-pack position globally. Combined with the expensing provisions introduced by the One Big Beautiful Bill Act (OBBBA), these business tax reforms have had a profound positive effect on the US’s overall ITCI ranking, improving it from 29th in 2014 to 14th in 2025. This upward trajectory illustrates the direct link between proactive tax policy reform and improved global competitiveness.
Other countries have similarly experienced significant improvements in their ITCI rankings by implementing reforms focused on business taxes. Canada, Greece, Hungary, and Iceland are notable examples. The United Kingdom and Canada, in particular, have followed the US’s lead in adopting expensing provisions for machinery and equipment, recognizing the powerful incentive this provides for capital investment and productivity growth.
Conversely, several countries have seen their rankings slip, often due to policy choices that increase tax burdens on businesses or introduce greater complexity. Colombia, Poland, Belgium, Chile, and the Czech Republic are among those that have fallen in the ITCI rankings. Many of these declines can be attributed to changes in their business tax regimes, such as raising corporate tax rates, introducing new digital service taxes, or limiting cost recovery mechanisms. These shifts highlight a dynamic global environment where tax policy is constantly evolving, with direct consequences for a nation’s attractiveness as an investment destination and its potential for economic growth.
The Enduring Importance of Tax Policy Design
The 12-year history of the Tax Foundation’s International Tax Competitiveness Index vividly illustrates that tax policy is in constant flux around the world, and crucially, that specific tax policy design choices have a measurable and significant impact on economic growth. As policymakers grapple with an array of formidable challenges in the coming years – from geopolitical instability and inflationary pressures to demographic shifts and the imperative of fiscal consolidation – they will undoubtedly need to make various policy adjustments. However, the evidence is becoming increasingly clear and compelling: the overarching and vital goal of achieving robust, long-term economic growth is inextricably linked to the competitiveness of a nation’s corporate tax system.
Optimizing corporate tax structures means moving towards systems that are simple, neutral, and encourage investment, innovation, and productivity. This involves not just setting competitive rates but also ensuring efficient cost recovery mechanisms, minimizing distortions, and carefully designing incentives. In a world where capital is highly mobile and competition for investment is fierce, countries that proactively refine their corporate tax systems will be better positioned to attract and retain businesses, foster economic expansion, and ultimately secure their fiscal health for future generations. The current global economic climate only amplifies the urgency of this endeavor, making smart corporate tax reform not just an economic advantage, but a strategic imperative.
