Northern Ireland's economic growth rate would need to more than double to make Irish unification financially sustainable, according to a new economic analysis released as part of a policy framework on Irish unity by Fine Gael, one of Ireland's main governing parties.
According to BBC News, the research was conducted by Prof Stephen Kinsella, an economist who argues that substantially faster growth would be essential to generate sufficient tax revenues for covering the costs associated with transitioning to a unified state.
A plan for reunification has to start as a plan for faster growth in Northern Ireland, Kinsella stated. He characterised the required acceleration as
a high bar to meet, but it is possible.
What growth rates are needed?
Northern Ireland's economy has expanded at an average annual rate of approximately 1.3% since the early 2000s. Under a unification scenario involving what Kinsella terms
managed integration—where public sector pay and social security benefits are gradually harmonised, infrastructure spending increases significantly, and some dual public services operate during institutional mergers—the region would require annual growth between 3% and 4.7% to finance transition-related borrowing over a 25-year timeframe.
Kinsella emphasised that
at 2% a year, no design repays its transition borrowing within 25 years, underscoring the fiscal mathematics underlying his analysis.
What policies could drive faster growth?
Kinsella identifies several policy levers that could accelerate economic expansion. Infrastructure investments in wastewater systems, electricity grids and transport networks feature prominently in his recommendations. He also highlights the importance of enhancing workforce skills, improving productivity among local businesses and strengthening research and development capacity.
Northern Ireland's current devolved administration has stated ambitions in these policy domains but has struggled to secure adequate funding or demonstrate the political commitment necessary to achieve substantial progress. The Irish government has already committed some resources to cross-border infrastructure projects, including the Narrow Water bridge.
What can Germany's experience teach us?
Kinsella briefly examines German reunification as a potential case study, drawing on influential research by economists Michael Burda and Battista Severgnini. Their work documented how eastern Germany experienced rapid initial growth following unification but subsequently failed to sustain its economic convergence with the west.
However, Kinsella notes that more recent data presents a more nuanced picture.
Convergence restarted after 2011, ran fastest from 2012 to 2019, was stopped by Covid, and has since slowed, especially outside Berlin, he observed. This suggests that while the initial post-reunification period proved challenging, longer-term economic integration between the two German regions has resumed, albeit unevenly.
What recent forecasts suggest about NI's growth prospects?
Recent economic assessments offer mixed signals about Northern Ireland's capacity to achieve the growth rates Kinsella identifies as necessary. Ulster University's Economic Policy Centre lifted its Northern Ireland growth forecast to 1.6% for 2026, projecting that the region should outperform the UK average over the coming five years. However, earlier forecasts had suggested growth of just 0.7% in 2026 due to rising energy costs and global volatility, while the Republic of Ireland was expected to achieve 2.7% growth. More positively, Northern Ireland's economy grew 2.3% annually to June 2026, outpacing UK growth, though businesses warned that rising energy and fuel costs threaten further expansion.
What further work does Kinsella recommend?
Kinsella acknowledges that additional research is required to refine his conclusions. He identifies the need for an economic model that would identify which households would benefit from unification and which would bear its costs. Such granular analysis would provide policymakers and the public with clearer information about the distributional consequences of any transition.
Kinsella concludes by drawing a distinction between economic and political questions.
Whether reunification happens is a political and constitutional question that no fiscal model can or should answer, he writes.
If it does happen, the quality of the preparation will decide whether it strengthens both economies or strains them. That preparation can begin now, while the choices can still be made calmly and on the evidence.
What happens next?
Fine Gael has signalled its intention to establish a unity forum to examine Ireland's constitutional future, while the Taoiseach has committed to setting up an initiative on the constitutional future of the island. These developments suggest that economic analysis such as Kinsella's will form part of a broader policy conversation about the conditions under which Irish unification might occur.
