Why Ireland’s GDP jumped 26% in one year but Irish people saw no difference
On the morning of July 12, 2016, Ireland’s Central Statistics Office did something statisticians almost never do: it released a number so bewildering that it immediately became an international news event. According to the CSO’s revised national accounts, Ireland’s gross domestic product had grown by 26.3 percent in 2015. In a single year. For context, China’s economy—then the fastest-growing major economy on earth—had expanded by 6.9 percent that same year. Ireland, a country of five million people on the edge of the Atlantic, had apparently tripled that.
A little over two hours after the data went live, Paul Krugman—Nobel laureate, New York Times columnist, one of the most recognisable economists on the planet—posted a tweet that would define the story. “Leprechaun economics: Ireland reports 26 percent growth! But it doesn’t make sense. Why are these in GDP?”
The phrase stuck. It was a little barbed, a little reductive, and—here’s the thing—entirely accurate. What had happened to Ireland’s GDP in 2015 was not economic growth in any meaningful sense. It was a statistical earthquake triggered by a single corporate decision, made in offices far from Dublin, that moved hundreds of billions of dollars of intellectual property across a spreadsheet and into Irish national accounts. The underlying economy—the one where people worked, bought things, and paid their rent—had grown by something closer to 5 percent.
To understand how this happened, and why it still matters, you need to understand something about the particular way Ireland built its economy over the past four decades.
The 12.5 Percent Promise
Ireland’s 12.5 percent corporate tax rate is perhaps the most consequential policy decision the state ever made. When the country opened itself to American multinationals in earnest from the 1990s onward, that rate—compared to 35 percent in the United States at the time—was a serious recruiting tool. Apple arrived in Cork in 1980. Google, Facebook, and Pfizer followed. By the 2010s, Ireland was home to the European headquarters of nearly every major American technology and pharmaceutical company.
But the 12.5 percent rate, low as it was, was only part of the picture. What really attracted multinationals wasn’t just where they paid tax—it was the elaborate structures that determined how much of their global profit was considered “Irish” in the first place.
The most notorious of these was a mechanism known as the “Double Irish.” In simplified terms, it worked by routing royalties through two Irish-registered companies—one of which was, for tax purposes, a resident of a zero-tax jurisdiction. Profits flowed through Ireland and out to the offshore entity, dramatically reducing the taxable base. For years, companies like Apple used versions of this structure to pay effective tax rates on their non-American profits that were, in some years, a fraction of a percent.
By the early 2010s, the Double Irish had become embarrassing. In 2013, Apple’s CEO Tim Cook appeared before the US Senate to answer questions about how the company had paid almost no tax on tens of billions in offshore profits. The OECD—the club of wealthy democracies—launched what it called the Base Erosion and Profit Shifting project, known as BEPS, with the explicit goal of closing structures like these. The project’s fifteen-point action plan, published in October 2015, was designed around a simple principle: profits should be taxed where economic value is actually created, not where companies park their intellectual property for accounting purposes.
Under pressure from the EU Commission, Ireland announced in October 2014 that it would close the Double Irish to new entrants from January 2015, with a final phase-out deadline for existing users set for 2020. It seemed like a victory for transparency. And then something unexpected happened.
The Green Jersey
On January 9, 2015, Apple formally informed the European Commission that it was closing its Double Irish structure. What the Commission may not have fully appreciated at the time was what Apple was moving into.
Ireland’s tax code contained another provision, introduced in the Finance Act of 2009 and quietly expanded in 2014: the Capital Allowances for Intangible Assets, or CAIA. Under CAIA, a company that “onshored” intellectual property into Ireland—legally transferring ownership to an Irish-registered subsidiary—could claim capital allowances equivalent to the full value of those assets against its taxable profits. In 2014, following lobbying by the American Chamber of Commerce in Ireland, the government raised the relief available under CAIA from 80 percent to 100 percent of the asset value.
What this meant in practice was extraordinary. If Apple transferred intellectual property worth, say, $300 billion to its Irish subsidiary, that subsidiary could claim $300 billion in capital allowances—effectively zeroing out its tax bill for years, while the profits from selling iPhones and software to every customer outside the United States flowed through Dublin.
In Q1 2015, that is approximately what Apple did. The economist Seamus Coffey—who would later chair the Irish Fiscal Advisory Council—spent nearly three years piecing together the evidence from company filings, tax returns, and CSO datasets. On January 24, 2018, he published a detailed analysis confirming what had long been suspected: Apple had restructured into the CAIA scheme from January 1, 2015, onshoring approximately $300 billion in intellectual property from Jersey to Ireland. It was, Coffey wrote, “the largest ever base erosion and profit shifting action in history”—a figure he calculated was more than double the scale of the blocked $160 billion Pfizer-Allergan inversion attempt in 2016.
The capital allowances claimed by multinationals in Ireland’s national accounts rose from €2.7 billion in 2014 to €28.9 billion in 2015. That tenfold increase tells you almost everything about the scale of what moved.
The €39 Billion Aircraft Fleet
Apple wasn’t the only company reshaping Ireland’s economic statistics that year. The 2015 spike had a second major contributor that, in its own way, was just as striking.
Ireland is home to a globally dominant aircraft leasing industry—a legacy of the country’s aviation heritage and its tax and legal infrastructure for asset-heavy businesses. AerCap, the world’s largest aircraft leasing company, had completed a massive acquisition in 2014, taking over International Lease Finance Corporation from AIG. As part of restructuring that combined company, AerCap redomiciled approximately €39 billion in aircraft assets to Ireland in early 2015.
Planes—physical, flying aircraft worth tens of millions of dollars each—are recorded in national accounts wherever the legal owner is based. When AerCap’s fleet landed, statistically speaking, in Ireland, the Irish capital stock expanded overnight by the equivalent of a significant chunk of the country’s annual economic output. Medtronic, the US medical devices company, completed a $48 billion merger with the Dublin-headquartered Covidien around the same time, adding another layer of corporate restructuring to the data.
Together—Apple’s IP, AerCap’s planes, Medtronic’s restructuring, and several smaller inversions—these transactions inflated Ireland’s recorded net exports by 102 percent in a single year and caused GDP output to jump by 97.8 percent in nominal terms. The revised growth figure the CSO published in July 2016 was, as the office carefully noted, driven entirely by “a number of once-off factors” related to asset relocations—not by anything that had changed in the real, functioning Irish economy.
A Number That Meant Nothing—and Cost Real Money
Here is the uncomfortable part. Employment in Ireland grew by just 2.6 percent in 2015—a figure that, while healthy, was roughly a tenth of the headline GDP growth rate. Consumer spending, housing starts, wage growth: none of these moved at anything approaching 26 percent. If you lived in Ireland in 2015, you would not have experienced an economy growing at Chinese speed. You would have experienced a normal, recovering post-crisis economy finding its feet.
But the GDP figure wasn’t just a statistical curiosity. It had real-world consequences. Ireland’s annual contribution to the EU budget is calculated as a percentage of its Eurostat-reported GDP. When the CSO revised 2015 GDP upward by 26.3 percent, Ireland’s EU levy increased by an estimated €380 million per year—money the Irish state now owed to Brussels based on a “growth” that had produced no additional tax revenues and no additional economic activity. The country had, in a very precise sense, been made poorer by becoming statistically richer.
The international community took note in other ways. In September 2016, Brazil blacklisted Ireland as a tax haven—the first time a G20 economy had done so to an EU member state. The IMF would later estimate that by 2019, some 60 percent of Ireland’s recorded foreign direct investment was what economists call “phantom”—paper flows with no physical presence behind them.
The Fix That Statisticians Invented
The CSO and the Central Bank of Ireland were faced with a genuine problem. GDP is the universal language of economics. Every international comparison, every EU budget calculation, every debt-to-GDP ratio depended on a figure that had become, for Ireland, essentially meaningless as a description of domestic economic conditions.
In February 2017, Ireland became the first country to formally abandon GDP as its primary economic metric, replacing it with a new measure: Modified Gross National Income, written as GNI* (pronounced “GNI star”). The asterisk is doing a lot of work.
GNI* takes Ireland’s gross national income and strips out three specific distortions: the depreciation of intellectual property assets held by foreign multinationals; the depreciation of aircraft owned by leasing companies based in Ireland but with no meaningful domestic economic footprint; and the net income of redomiciled companies—corporate headquarters that are registered in Ireland but have minimal actual operations here.
What remains is a measure that tracks compensation of employees, profits from genuinely Irish-owned enterprises, and government tax revenues—the things that can actually be spent, invested, or borrowed against inside the country. It is, in short, an attempt to answer a question that the standard textbook definition of GDP was never designed to handle: what is the actual size of this economy?
The gap between the two measures is striking. In 2024, Ireland’s official GDP stood at €562.8 billion. Its GNI* was €321.1 billion—meaning the “real” economy is roughly 57 percent of the headline number. By comparison, in most EU member states, GNI and GDP are within a few percentage points of each other. The EU-28 aggregate ratio is essentially 100 percent. Ireland’s GDP, calculated on the same basis used to compare France, Germany, and Poland, overstates the domestic economy by a factor of nearly two.
This matters for more than abstract statistical reasons. When Ireland’s GDP-per-capita figure suggests the country is one of the wealthiest in Europe, it affects perceptions of how much the state can afford to spend on housing, healthcare, and infrastructure. It affects the interest rates Ireland can borrow at. And it complicates every attempt to compare Irish living standards with those of its European neighbours—because the headline figure includes profits generated here but flowing directly to shareholders in California and New York.
The Rules Designed to Close It
The OECD’s BEPS project—the same initiative that inadvertently triggered the 2015 IP onshoring rush by closing the Double Irish—has spent the past decade trying to build a more durable global framework. Its second phase, known as BEPS 2.0 or Pillar Two, established a global minimum effective corporate tax rate of 15 percent, which Ireland signed onto in October 2021.
For Ireland, this is genuinely significant. The CAIA structures that Apple used in 2015 depended on capital allowances that could reduce the effective tax rate on onshored IP profits close to zero. Under Pillar Two, any company with annual revenues above €750 million that pays an effective rate below 15 percent in any jurisdiction will face a top-up tax, payable either in Ireland or in its home country. The pure IP-transfer play—move assets to Dublin, claim 100 percent capital allowances, pay near-zero tax—becomes much less attractive when the minimum rate is locked in globally.
Whether this closes the gap between Ireland’s GDP and GNI* over time remains to be seen. Multinationals don’t relocate IP for a single reason, and Ireland’s educated English-speaking workforce, legal system, and genuine cluster of technology expertise remain powerful draws that go beyond tax arithmetic. In 2024, GNI* grew by 4.8 percent in real terms—faster than GDP’s 2.6 percent—a sign that the domestic economy is in reasonable health regardless of what the headline figure suggests.
But the legacy of 2015 remains embedded in the statistics. Ireland will, for the foreseeable future, report a GDP that bears little resemblance to what the country’s five million residents actually produce and earn. The CSO’s invented asterisk—GNI*—is a permanent reminder that standard economic measurement was built for a world where the factories are where the profits are recorded.
What Krugman Got Right (and Slightly Wrong)
It’s worth going back to that tweet. Krugman was right that the 26 percent growth figure was absurd as a description of Irish economic reality. He was right that the standard tools of macroeconomics were failing to capture what was actually happening. And the term he coined—leprechaun economics—stuck precisely because it captured the fairy-tale quality of numbers that appeared from nowhere and couldn’t quite be explained.
But there was a dimension the tweet couldn’t carry. What happened in 2015 wasn’t really Ireland’s doing, in the sense of a cunning trick played on the world. It was the predictable consequence of a global tax system built on rules that hadn’t kept pace with the reality of digital goods, intangible assets, and companies whose most valuable products weigh nothing and can be assigned to any jurisdiction on earth with a signature.
Ireland built its economic model around attracting those companies, and it worked—extraordinarily well, by most measures. The corporate tax revenues generated by multinationals account for a significant and growing share of Irish government receipts. The jobs in Google’s and Meta’s Dublin campuses are real, well-paid, and numerous. The pharmaceutical exports leaving Shannon are physical products made by real people.
The 26.3 percent was something else: a ghost in the machine, a rounding error at planetary scale, a moment when the gap between the map and the territory became impossible to ignore. Ireland’s statisticians spent the next two years building a better map. They called it GNI*. And every time you see an Irish GDP figure that seems improbably large, it’s worth remembering the asterisk—and what it took to earn it.
There is something almost fitting about the fact that the most famous number in modern Irish economic history is a number that described nothing real. Ireland has always been a country whose story resists the obvious measurement—too complex, too particular, too shaped by forces far beyond its own shores to be captured in a single figure. The CSO’s asterisk is, in its own quiet way, an act of intellectual honesty that most countries haven’t felt compelled to attempt. That counts for something.
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