Ireland and Luxembourg in 2026: what institutional private markets investors need to know

AIFMD II implementation, regulatory modernisation and evolving tax/structuring toolkits are strengthening both European fund domiciles and widening the set of viable sponsor choices.

For more than a decade, Luxembourg and Ireland have been the two cornerstone domiciles for European private markets – Luxembourg for its long‑established cross‑border fund platform and depth of structuring options, and Ireland for its institutional-grade servicing ecosystem and increasingly flexible fund toolkit. Heading into 2026, both jurisdictions are strengthening their propositions: Luxembourg continues to set a high bar for scale and product breadth, while Ireland has sharpened its offer through full AIFMD II alignment, an updated private asset regulatory framework at the Central Bank of Ireland (CBI), and a clear policy direction to reduce tax frictions in PE/credit structures (including SPVs, withholding tax and Section 110 mechanics). For institutional allocators and the managers who serve them, the practical outcome is a more competitive – and more clearly choice‑driven – European domicile landscape where both Luxembourg and Ireland remain compelling options.

1. Ireland’s scale and institutional maturity in the European market

Ireland sits alongside Luxembourg as a leading European fund domicile, combining significant scale with a mature institutional ecosystem. By Q3 2025, Irish‑domiciled NAV hit EUR 5.309 trillion, up from EUR 4.676 trillion the prior year, a 13.5% gain driven largely by institutional alternative strategies.

Across private equity, credit, infrastructure, and real estate, global managers increasingly use ICAVs and ILPs as their European flagship vehicles. These structures are aligned to the expectations of U.S. and UK institutional investors:

• Common‑law foundation, aligned with Delaware and English LP frameworks.
• English‑speaking legal and regulatory environment, offering communication efficiency for cross‑border LPs, side‑letter negotiations and financing counterparties.
• EU marketing passport, enabling an Irish‑domiciled AIFs to distribute seamlessly across the entire EU/EEA bloc.

Add to that Ireland’s scale as an operating hub, where significant servicing for Luxembourg‑domiciled funds also takes place, and the jurisdiction becomes much more than a domicile: it is the back‑office, middle‑office and front‑office engine that powers European alternative strategies.

2. Regulatory clarity in the AIFMD II era: Ireland’s approach to implementation and supervisory engagement

With AIFMD II going live across the EU by 16 April 2026, Ireland’s Central Bank (CBI) has set out a clear implementation pathway, including removing certain domestic overlays and updating its AIF Rulebook via the CP162 reforms. For institutional investors, the significance is practical: more predictable requirements, a clearer supervisory framework, and reduced execution friction when structuring and operating private market funds. This matters for three key reasons:

2.1 Loan‑origination AIFs (private credit)

Ireland has retired its bespoke domestic loan‑origination regime, replacing it with the EU‑harmonised model under AIFMD II. 

This harmonised rulebook brings:

• 175% leverage cap for open‑ended AIF structures and 300% for closed‑ended AIF structures.
• Standardised borrower restrictions, improving risk discipline and cross‑border consistency.
• Reduced domestic constraints that previously added complexity for certain Irish direct‑lending structures, supporting greater consistency for managers operating across multiple EU domiciles.
• Permission for non‑EU AIFMs (e.g., US/UK) to manage Irish loan‑originating QIAIFs for professional investors.

For institutional allocators building multi‑jurisdictional credit platforms, this alignment supports more consistent structuring choices across EU domiciles – allowing managers to select Ireland or Luxembourg based on strategy needs, investor preferences and operational considerations.

2.2 Flexibility for PE and infrastructure SPV stacks

The CBI is removing prescriptive rules on wholly‑owned subsidiaries and replacing them with a disclose and oversee model.

Fund vehicles can now:

• Use intermediary SPVs more flexibly for tax, financing, or legal purposes.
• Grant portfolio‑level or financing guarantees, a common market practice that was previously restricted.

Institutional investors benefit because these changes standardise Ireland with real‑world PE structuring norms, reducing execution friction on deals, co‑invest platforms and multi‑jurisdictional holding company structures.

3. Tax: Ireland’s biggest shift in a decade – and the one institutions care about most

The institutional tax message for 2026 is simple:

Ireland is intentionally removing complications in private equity and private credit structures.

This is happening on three fronts:

3.1 Simplifying SPV‑level taxation (including Section 110 reforms)

Ireland’s government explicitly committed to simplifying interest deductibility, aligning trading vs. passive interest treatment, and reviewing the tax mechanics central to PE/credit SPVs.

• The Action Plan on interest deductibility reform, forming part of Budget 2026, creates a more coherent framework for SPV financing flows and removes legacy distortions between income and corporation tax treatment.
• Section 110 rules, crucial for securitisation, credit and infrastructure SPVs, are being modernised to fix “unintended impacts” from previous rule changes, expand flexibility in the Day‑1 asset threshold, and consolidate overlapping deductibility tests.

What this means for PE/credit sponsors:

Fewer bespoke tax opinions, fewer blockers around lender deductibility, and more predictable outcomes on intercompany loan flows, particularly relevant for continuation funds, NAV facilities and asset‑level leverage.

3.2 Withholding tax (WHT) simplification and digitisation

Budget 2026 sets out a roadmap to modernise withholding tax, with the Department of Finance planning a digitised, streamlined WHT framework.

• Consultations are tied to a broader simplification initiative designed to remove administrative frictions in cross‑border payments.
• This is essential for institutional structures where capital is pooled through multi‑layer SPVs, master‑feeder arrangements or co‑investment sleeves.

Why investment managers should care:

Reduced WHT complexity means cleaner cashflow modelling for LPs, simpler upstream distributions and, critically, less drag on cross‑border returns for non‑Irish investors. 

3.3 Strengthening Ireland’s holding‑company regime

Ireland continues to expand its participation exemption for foreign dividends by:

• Widening the geographic scope to include more jurisdictions with non‑refundable withholding taxes.
• Reducing residency period requirements from five years to three.
• Introducing technical amendments improving the operation of the relief. 

For global PE platforms, this means more efficient holding structures, reduced need for treaty‑shopping SPVs, and streamlined consolidation of European and non‑European portfolio assets.

4. Ireland and Luxembourg: a closer institutional comparison in 2026

Luxembourg and Ireland each bring distinct institutional strengths to cross‑border fund structuring and servicing, and the practical differences for many private market strategies have narrowed further in the run‑up to AIFMD II.

Luxembourg commands roughly 48% of global cross‑border fund AUM, with Ireland holding 43%. Both jurisdictions continue to attract institutional flows, with Ireland’s alternative fund base (including QIAIFs such as ICAVs and ILPs) growing strongly alongside Luxembourg’s continued leadership in product breadth and international distribution – reflecting sustained demand for both domiciles across private markets strategies.

Areas where Ireland is often cited positively by institutional sponsors:

a) Documentation and legal familiarity
A common‑law system enables smoother translation of Delaware/English PE terms into Irish ILP agreements.

b) Operational ecosystem
Ireland has a large and established talent base for fund administration, depositary operations and middle‑office outsourcing. In practice, many Luxembourg‑domiciled funds also rely on Irish operating capabilities, illustrating how the two jurisdictions can be complementary across domicile and servicing decisions.

c) Speed and pragmatism in regulatory updates
The CBI has demonstrated speed and commercial awareness in AIFMD II transposition, implementing a streamlined authorisation‑extension process for loan‑origination AIFMs.

5. What institutional allocators should be asking managers in 2026

When assessing whether a GP has selected the optimal domicile, institutional LPs should now ask:

1. How aligned is your structure to AIFMD II without additional domestic restrictions?

Ireland’s removal of gold‑plating ensures clean EU harmonisation under AIFM II

2. Have you captured the new tax simplifications?

This includes:

• SPV‑level interest deductibility alignment,
• WHT modernisation,
• Updated participation exemption rules,
• Section 110 optimisation.

3. Are your downstream investment vehicles structured efficiently but flexibly?

Under CP162 reforms, managers can now use intermediary SPVs without historical constraints.

4. Are operational functions located where the expertise is?

If servicing is done in Ireland, co‑locating domicile, management and administration can materially reduce operational, tax and regulatory friction.

6. The bottom line for 2026: two strong European domiciles, with a more choice‑driven decision set

For private markets investors assessing domicile options in 2026, both Luxembourg and Ireland offer credible, institutionally familiar pathways – often with the decision coming down to product fit, investor expectations, service model and tax/regulatory preferences.

• Regulatory certainty through full AIFMD II alignment.
• Private equity-friendly structuring flexibility with fewer SPV restrictions and market‑standard deal finance mechanics.
• A modernising tax environment tackling the historic pain points in SPV‑level taxation, interest deductibility, and withholding processes.
• Deep operations infrastructure trusted globally, with servicing models that frequently support both Irish‑ and Luxembourg‑domiciled structures.
• A legal framework aligned with institutional expectations, particularly for US/UK sponsors and their LPs.

In 2026, the more useful question for institutional private markets strategies is increasingly:
“Which domicile best matches our product design, investor base and operating model – Luxembourg, Ireland, or a combination of both?”