Selecting fund domiciles for private debt funds: a governance view of fund domicile

Luxembourg dominates European private debt. A large majority of managers establish vehicles there, and the reason is access. A Luxembourg fund managed by an authorised AIFM gets the EU AIFMD marketing passport, which lets it be marketed to professional investors across the EU without negotiating each national regime separately. For a fund seeking European institutional capital, the marketing passport is the main reason to domicile there.

The structure that dominates is the Reserved Alternative Investment Fund, the RAIF. Its appeal is speed and flexibility. The RAIF is not itself subject to product-level supervision by the regulator, because supervision happens at the level of its authorised AIFM; that lets it be established quickly, often within 45 to 60 days, and run with considerable structural flexibility. The older regulated vehicles, the SIF and the SICAR, are used less often, because product-level regulation added time and cost without adding much that AIFM-level supervision did not already cover.

RAIF structures still carry meaningful governance obligations. The fund itself may not be product-regulated, but the AIFM is, and the substance requirements sitting on the Luxembourg structure are real and rising. You need genuine local substance: board members who make real decisions, and operations that are more than a brass plate. Full AIFMD obligations at the manager level, plus meaningful substance at the fund level, make Luxembourg a serious operational commitment, not a light-touch option. For most managers the access is worth it. It should be entered with open eyes about the running cost.

Ireland competes with Luxembourg for European-passported capital and wins in particular segments. The Irish Collective Asset-management Vehicle, the ICAV, is a purpose-built corporate fund structure with useful tax flexibility, including the ability to elect its treatment under the US check-the-box rules, which matters for funds with US investors. Ireland also has the Section 110 securitisation company, a long-established platform for holding and financing debt assets tax-efficiently, which makes it a natural home for structured and securitised credit.

Ireland’s strengths are real and specialised. It has deep expertise in particular asset classes, lower operational costs than Luxembourg in some respects, and a well-developed servicing industry. Its adoption for mainstream direct lending has historically been narrower than Luxembourg’s, partly a matter of where the lawyers and the precedent sit. For a manager whose strategy fits the Section 110 platform, or who values the ICAV’s US tax flexibility, Ireland is often the better answer. For a plain-vanilla European direct lending fund chasing the broadest institutional distribution, Luxembourg still wins.

The Cayman Islands remains the default for funds targeting non-EU investors, particularly US and Asian institutional capital. The Exempted Limited Partnership is a familiar, flexible structure; the jurisdiction is tax-neutral, so it adds no layer of fund-level tax; and the regulatory regime is light. For a fund whose investor base does not need EU access, Cayman is efficient and well understood.

Two things have changed that: substance and access. Economic substance requirements, introduced in response to international pressure, mean Cayman entities conducting relevant activities now have to show real substance in the jurisdiction, which has raised the compliance bar. The structural limit is unchanged. A Cayman fund cannot use the EU AIFMD passport. To reach EU investors a manager either relies on national private placement regimes, which are a patchwork and are being narrowed, or runs a parallel EU vehicle alongside the Cayman one. That parallel approach is common, and it doubles the governance: two funds, two sets of accounts, two oversight regimes, and an obligation to allocate fairly between them under SYSC 10.

The UK lost the AIFMD marketing passport at Brexit. A UK-domiciled fund can no longer be freely marketed into the EU, and for a manager chasing European capital that is the fact that dominates the domicile question. UK-managed funds reaching EU investors do so through national private placement regimes or parallel EU structures, with the same doubling of governance that implies.

What the UK has built to compete is tax structure, not passporting. The Qualifying Asset Holding Company regime, the QAHC, is designed to make the UK attractive for the intermediate holding companies that funds use to hold their assets. A qualifying QAHC pays no corporation tax on gains from disposals of qualifying shares and certain other assets, and there is no UK withholding tax on interest payments it makes, which removes the double taxation that would otherwise make a UK holding vehicle uncompetitive. For a UK-based manager, the QAHC lets the holding structure sit onshore, close to the team, the regulator and the advisers, without a tax penalty. It does not solve the marketing-access problem. It does make the UK a credible home for the holding layer of a structure whose fund vehicle sits elsewhere.

Underneath the choice of fund domicile sits the choice of intermediate holding structure, and that is where most of the tax efficiency is won or lost. Funds route investments through holding companies in jurisdictions with broad double-tax treaty networks, Luxembourg SOPARFIs, Irish Section 110 companies, UK holding companies and QAHCs, to cut withholding taxes and avoid layering tax at each level. The best treaty networks exceed 70 relationships, and access to them is a large part of why these jurisdictions get chosen.

The constraint that now governs all of it is substance. OECD BEPS requirements, and the local substance rules that implement them, mean a holding entity has to have genuine operations, real decision-making and appropriate local presence to access treaty benefits. The letterbox company, an address and a nameplate, is no longer accepted by regulators and tax authorities, and it creates risk if challenged. For a private credit fund lending into the US there is a further layer: the effectively connected income rules can tax a foreign lender as if it were carrying on a US trade, and managers mitigate this through corporate blockers, season-and-sell structuring, or treaty-based positions. Get the substance or the US tax treatment wrong and the result is unintended tax leakage; the governance function has to be able to show the substance is real, not assumed.

Choosing a domicile is also, in practice, choosing how the fund will be managed and supervised, because the domicile determines what kind of AIFM the structure needs. A Luxembourg or Irish fund seeking the EU passport needs an EU-authorised AIFM, and the manager has two routes. It can stand up its own authorised management company in the jurisdiction, which is a serious undertaking in capital, staff and substance. Or it can appoint a third-party management company, a host AIFM, that provides the regulated wrapper while the investment manager is delegated the portfolio management. The third-party route is how most mid-sized managers reach Europe. It is efficient, and it changes the governance picture: the host AIFM is the regulated entity, it owns the risk and compliance functions in the eyes of the regulator, and the investment manager operates under a delegation the host oversees.

That delegation is not a formality, and AIFMD II tightens it. From April 2026 the directive sharpens the rules on delegation and substance, requiring an AIFM to retain genuine substance and not delegate so much that it becomes a letterbox. For a UK manager using a European host AIFM, the relationship then has to be a real oversight relationship, with the host supervising the delegate, reporting lines that work, and the substance located where the regulator expects it. AIFMD II’s substance rules require genuine retained oversight, not a host AIFM used as a rubber stamp. Choosing a domicile commits you to an AIFM model and an ongoing oversight relationship for the life of the fund.

Whichever domicile you choose, the structure comes with ongoing reporting the governance function has to deliver, and the volume of it surprises managers who focused on the launch rather than the running. An AIFM marketing in the EU files Annex IV transparency reporting to regulators, covering the fund’s exposures, leverage, liquidity and risk, at a frequency that scales with the fund’s size and leverage. The fund and its holding entities sit inside the FATCA and Common Reporting Standard frameworks, which require identification and reporting of investors’ tax residency; getting that wrong causes problems with both the investors and the tax authorities. The substance regimes in Luxembourg, Ireland and Cayman each carry their own annual confirmations and filings. And the manager’s own regulatory reporting, to the FCA in the UK case, continues regardless of where the fund sits.

This matters at the domicile-selection stage because the running cost and the governance load are not the same across jurisdictions, and a structure chosen purely on launch speed or headline tax can carry a reporting burden that only shows up in year two. A realistic domicile decision prices in the recurring compliance and reporting obligations, not just the setup, because those obligations are what the governance function lives with once the fund is deployed.

Take a UK-based manager raising a direct lending fund aimed mainly at European pension and insurance capital, with a minority of US investors. The tax-led instinct is to default to a Cayman ELP because it is familiar and cheap. Start from the investors: who they are and how they need to access the fund.

Because the core capital is European institutional, the fund needs the AIFMD passport, which rules out a standalone Cayman vehicle as the main fund. That points to a Luxembourg RAIF or an Irish ICAV. If the strategy is plain direct lending and the priority is the broadest European distribution and the deepest precedent, Luxembourg is the natural choice, accepting the substance and AIFMD cost that comes with it. The US minority is handled either through the ICAV’s check-the-box flexibility, if Ireland is chosen, or through a feeder and an appropriate blocker into the Luxembourg vehicle. The holding layer can sit in a UK QAHC, keeping the asset-holding structure onshore and close to the manager without a tax penalty, while the fund vehicle takes its passport from Luxembourg.

Investor access, not tax, drove the structure. Decide distribution first and tax second, so the structure reaches your target investors. Domicile follows distribution; reversing the order produces a structure that can’t reach its investors.

The technical features of a domicile, passport, tax, substance, are the measurable part of the decision. Reputation is the less measurable part, and it matters more than managers expect when they are raising capital. Sophisticated institutional investors run their own due diligence on the jurisdictions a fund uses, and some allocators have internal policies that restrict or scrutinise investment through jurisdictions seen as opaque. A domicile that looks efficient on paper but carries reputational baggage can cost a manager access to exactly the LPs it wants, turning a tax saving into a fundraising problem. Luxembourg and Ireland are chosen partly because their regulatory credibility reassures institutional investors and their advisers, and that reassurance has commercial value that never shows up in a tax comparison.

Regime stability is the other factor, and a less discussed one. A domicile is a decade-plus commitment, and a manager is betting the jurisdiction’s tax and regulatory framework stays broadly stable over the fund’s life. Jurisdictions that have been responsive to international standards, implementing substance rules and transparency frameworks rather than resisting them, tend to be safer long-term homes than those forced into reform under pressure. For the governance function, choosing a stable, well-regarded domicile is itself a risk-management decision: it lowers the chance the structure has to be unwound or re-papered midway through the fund’s life because the jurisdiction’s standing changed.

This insight is provided for general informational purposes only and doesn’t constitute legal, investment, or regulatory advice.