Why Ireland publishes two measures of its own economy

Why there are two sets of figures

Measured output in 2025 was 721.7 billion United States dollars, or 131,592 dollars a head, and 155,089 dollars a head at purchasing power parity. Those are the numbers every international comparison picks up, and the Irish statistical office publishes a second measure precisely because they should not be read that way.

Modified gross national income, written GNI*, was designed to measure the size of the Irish economy with globalisation effects removed. It stood at 334 billion euros in 2025, up from 322 billion in 2024, and it amounted to 55.4% of gross domestic product, down from 57.2% the year before. Real modified income grew 4.7% in 2025, against measured gross domestic product growth of 12.3%, and the distance between those two growth rates in a single year is the clearest statement of the problem: they describe the same twelve months in the same country and they disagree by a factor of nearly three.

The correction removes two specific things. Gross national income counts assets before depreciation, and foreign-owned companies hold assets in Ireland with very high depreciation that are not necessarily used in production here. Intellectual property is the first: intangible, easily moved between jurisdictions, and capable of making national income jump because a corporate structure was rearranged. Leased aircraft are the second, for much the same reason.

How the headline number became unusable

The problem is not new and it has a date. Official figures for 2015 showed gross domestic product growing 26.3% and gross national product 18.7%, a result the economist Paul Krugman labelled leprechaun economics and which was widely ridiculed. The official explanation was that the phasing out of a tax structure known as the double Irish, closed to new entrants at the end of 2014, caused companies to relocate assets into Ireland, and the assets arrived on the national accounts as growth.

Nothing had been produced and nobody in Ireland was richer. The figures were correct under the rules and useless as a description of the country, and the Economic Statistics Review Group that followed recommended the modified measure now published alongside them.

The same mechanism still operates. Measured growth reached 12.3% in 2025, and the OECD attributes the surge to a boost in pharmaceutical exports brought forward ahead of expected tariffs. It expects the economy to contract by 1% in 2026 as that frontloading unwinds, before growing 2.9% in 2027, while modified domestic demand, the measure that controls for the main distortions, moves far less violently in either direction.

What the multinational sector actually is

Foreign-owned multinationals are not a component of the Irish economy; they are a large part of its structure. They account for fourteen of the twenty largest Irish firms by turnover, employ 23% of the private sector labour force, and pay 80% of the corporation tax collected.

The concentration cuts both ways. It has lifted per capita income and labour productivity well above what the domestic economy generates on its own, and it means a substantial share of the state's revenue depends on decisions taken in a small number of company headquarters outside the country. The OECD's standing recommendation is a more diversified revenue structure, on the ground that resilience to shocks and stable funding for long-term investment both require it.

The other half of the economy looks different. Domestic firms have remained far less productive than the multinational sector, and the gap has not narrowed as the multinational sector has grown. Ireland therefore runs two economies in the same jurisdiction: one at the technological frontier, exporting pharmaceuticals and software, and one of domestically owned firms serving a small home market at ordinary European productivity levels. The two share a labour market, a tax system and a housing stock, which is why wages and rents set by the first are paid by workers in the second, and why the cost of living in Dublin is calibrated to salaries most people in the country do not earn. Private domestic investment has also been volatile in the multinational sector and subdued overall in recent years, so the second economy has not been getting the capital that would let it close the gap.

Who works and who is kept out

Unemployment stood at 4.6% in 2025 and the labour market has been the reliably good news in the Irish economy for a decade. Employment rates have risen, driven by rapid population growth supported by net inward migration, and by rising participation among women and older workers.

The constraints are specific rather than general. The OECD identifies childcare access and tax disincentives for second earners as the binding limits on further participation, and connects both to the high share of Irish women working part-time. These are policy choices with measurable effects rather than cultural facts.

Population growth is the other side of the same coin. Inward migration has supplied the labour that the multinational sector needed, and it has arrived faster than the country has built the housing and the utilities to accommodate it. That is the reason capacity constraints appear in every recent assessment of the Irish economy.

What the country actually sells

Behind the accounting there is a real export economy, and it rests on three sectors. Pharmaceuticals is the largest: the sector employs roughly 50,000 people and accounts for 55 billion euros of exports, with a substantial cluster around Cork at Little Island and Ringaskiddy. Software is the second, employing about 24,000 people, contributing 16 billion euros, and hosting operations of the ten largest global technology firms among more than nine hundred software companies in the country.

Agriculture and food is the third, and the only one whose largest firms are Irish-owned. The agri-food sector generated 7% of gross value added, or 13.9 billion euros, in 2016, accounted for 8.5% of national employment and 9.8% of merchandise exports, and it is built on cattle, beef and dairy, with several dairy brands that sell internationally on the strength of a grass-fed production system the climate makes possible.

The three sectors have very different relationships to the distortion in the headline figures. Pharmaceutical output is genuinely manufactured in Ireland even when the intellectual property behind it is booked here for tax reasons, which is why the 2025 export surge ahead of expected tariffs was real production rather than an accounting entry. Software output is more mobile. Agri-food is the least distorted of the three and the most exposed to trade policy and to weather.

That spread is also the country's insurance policy. A small economy with three unrelated export bases is less fragile than one with a single sector, even when the largest of the three is concentrated in a handful of foreign-owned firms.

What the country cannot build fast enough

Housing is the central domestic economic problem and has been since the recovery began. Property prices resumed rising in 2014, fastest in Dublin, driven by a shortage of supply, and by 2015 increases outside the capital were outpacing those inside it, with Cork up 7.2% and Galway 6.8% in that year.

The shortage has proved durable because the causes are structural. The construction sector was destroyed in the crash after 2008 and rebuilt slowly, planning and infrastructure provision have lagged a rapidly growing population, and the same capacity constraints that limit housing limit the water and transport connections that new housing requires.

The OECD treats it as a competitiveness question as much as a social one. A country whose economic model depends on attracting skilled workers to foreign-owned firms cannot indefinitely fail to house them, and the same investment needs compete with spending pressures from an ageing population, the climate transition and infrastructure gaps. Its advice is prioritisation and sequencing rather than more spending, because the constraint is delivery capacity rather than money. That is an unusual position for a state to be in. Ireland has the revenue, largely from corporation tax paid by the same multinationals whose staff need the housing, and cannot convert it into built infrastructure fast enough, which turns a fiscal surplus into a political problem rather than a solution.

What the energy system has to do next

Ireland has committed to net zero emissions by 2050 and to generating 80% of its electricity from renewable sources by 2030, and the International Energy Agency's assessment is that the policy framework is comprehensive and the implementation now needs to accelerate.

The physical basis for the target is offshore wind, which the agency expects to become the foundation of Irish energy supply. The country sits on the eastern Atlantic with a long, shallow continental shelf and some of the best wind resources in Europe, and almost none of it has been developed. Natural gas remains necessary in the meantime, at least until the mid-2030s, and particularly for meeting peak electricity demand when the wind is not blowing.

The complication is the same one that runs through the rest of the economy. Data centres serving the multinational technology sector consume a large and growing share of Irish electricity, so the demand curve is rising at the same time as the supply is being rebuilt, and grid connections have become a constraint on both new data centres and new housing. Energy capacity, housing capacity and infrastructure capacity are one problem in three forms, and the country is trying to solve all three with the same construction sector at the same time. Ireland: geography takes up the wind and the coastline it comes off.

How the crash still shapes the argument

The Celtic Tiger period from the mid-1990s ran on genuine growth in exports, consumer spending, construction and business investment, underpinned since 1987 by social partnership, a set of voluntary pay agreements between government, employers and trade unions. It ended in a credit-driven property bubble and a banking collapse.

The distortion of Irish economic data by multinational tax structures contributed directly to that build-up. It inflated the apparent wealth of the country, encouraging households to borrow to 190% of disposable income and banks to lend more than 180% of their deposit base, both the highest ratios in the OECD at the time, and it encouraged global capital markets to keep funding them.

That history is why the two-measure convention matters beyond statistics. A country that mistook an accounting artefact for prosperity once has good reason to publish the corrected number beside the headline one, and it is the strongest argument for reading Irish economic reporting with the second figure in hand. Ireland: politics sets out the fiscal framework that has to manage both, and Ireland: overview sets the scale of the economy in context.