Setting Up a Fund in Ireland: ICAV, UCITS and QIAIF

Setting up a fund in Ireland means choosing between the ICAV, UCITS and QIAIF. We explain the structures, tax neutrality and why Ireland leads in Europe.

Ireland has, over three decades, established itself as one of the leading fund domiciles in Europe and a default home for cross-border investment vehicles. For managers raising capital from European, North American and Asian investors, setting up a fund in Ireland offers a credible regulator, a deep service ecosystem and a structure that travels well across borders.

The questions we are asked most often are not whether to use Ireland, but which structure to use within it. The headline choices are the ICAV as a corporate vehicle, and the regulatory distinction between a UCITS fund and a QIAIF. These are not interchangeable, and choosing wrongly is expensive to correct later.

This article sets out how the pieces fit together, who typically uses each, and the practical considerations that tend to surprise first-time sponsors.

The ICAV: Ireland's purpose-built fund vehicle

The Irish Collective Asset-management Vehicle, or ICAV, is a corporate fund structure introduced specifically for the funds industry. It sits alongside older options such as the investment company and the unit trust, but it has become the structure of choice for most new Irish funds.

Two features explain its popularity. First, the ICAV is not subject to certain company-law provisions designed for trading companies rather than investment vehicles, which removes friction that was never relevant to a fund in the first place. Second, and more significantly for many sponsors, an ICAV can elect to check the box for United States tax purposes, allowing it to be treated as a transparent or disregarded entity by US investors. For managers raising from US taxable or tax-exempt investors, this flexibility is often decisive.

The ICAV can be established as a single fund or as an umbrella with multiple sub-funds, each with segregated assets and liabilities. The umbrella approach is common where a manager expects to launch several strategies over time, since adding a sub-fund is typically faster and cheaper than establishing a new standalone vehicle.

It is worth being precise about one point. The ICAV is the legal wrapper. Whether that wrapper is regulated as a UCITS or as a QIAIF is a separate decision, and it is that regulatory designation, not the corporate form, that determines who can invest and what the fund can do.

UCITS: the retail-facing, passportable standard

UCITS stands for Undertakings for Collective Investment in Transferable Securities. It is a pan-European regulatory framework that allows a fund authorised in one EU member state to be marketed to retail investors across the bloc under a single passport. UCITS has also become a recognised quality mark well beyond Europe, with funds frequently distributed into parts of Asia, Latin America and the Middle East.

The trade-off for that broad distribution is constraint. UCITS funds operate within detailed rules on eligible assets, diversification, liquidity and the use of leverage. They are designed to be liquid and broadly diversified, which suits long-only equity, fixed income and many systematic strategies. They are a poor fit for illiquid assets, concentrated positions or strategies that rely heavily on leverage or shorting through physical means.

For a manager whose proposition is a transparent, liquid strategy aimed at a wide investor base, UCITS is frequently the right answer. The framework's familiarity reassures allocators and distributors, and the passport materially lowers the cost of reaching investors in multiple jurisdictions.

QIAIF: the flexible vehicle for sophisticated investors

The Qualifying Investor Alternative Investment Fund, or QIAIF, sits at the other end of the spectrum. It is Ireland's flagship vehicle for alternative strategies and is, in practice, largely free of investment and leverage restrictions at the regulatory level. Hedge funds, private equity, private credit, real estate and infrastructure strategies are commonly housed in QIAIFs.

That flexibility comes with a gating requirement. A QIAIF may only be sold to qualifying investors, broadly meaning professional investors or those meeting a minimum subscription threshold, which as at 2026 has typically been set at the level historically associated with this category. The QIAIF is not a retail product, and it should not be presented as one.

A practical advantage that managers value is speed to market. The QIAIF benefits from a fast-track authorisation route with the Central Bank of Ireland, which can allow a fund to be approved on a short timeline once the documentation is in order and an Alternative Investment Fund Manager is in place. We would caution against reading "fast" as "automatic": the regulator still expects a complete and coherent file, and rushing the preparation tends to cost more time than it saves.

Tax neutrality and the cross-border picture

A central reason funds domicile in Ireland is tax neutrality at the fund level. Regulated Irish funds are generally not subject to Irish tax on their income and gains, which means returns are not eroded by a layer of tax inside the vehicle. Tax instead falls to be considered at the level of the investor, in the investor's own jurisdiction, which is the position most international allocators expect.

This neutrality is reinforced by Ireland's extensive network of double-taxation treaties and its position within the EU, which can assist with the treatment of income received by the fund from its underlying investments. The benefits available vary considerably depending on the asset class, the source country and the investor base, so the analysis has to be done on the specific facts rather than assumed.

We will sound one note of caution that applies regardless of structure. Tax treatment depends on each investor's circumstances and on rules that change. The fund-level neutrality is robust and well understood; the investor-level outcome is not something any adviser should guarantee in advance, and we do not.

Who uses what, and why it matters

In broad terms, the pattern we see is straightforward. Liquid, diversified, distribution-led strategies aimed at a wide or retail base gravitate to UCITS, usually within an ICAV. Alternative, illiquid or leverage-dependent strategies sold to professional and institutional investors gravitate to the QIAIF, again often within an ICAV.

The reason the choice matters so much is that it is difficult and costly to change after launch. Converting a fund's regulatory designation, or migrating investors between vehicles, is not a routine administrative step. It is far better to map the intended investor base, asset class and distribution strategy before incorporation and let those facts drive the structure, than to retrofit a structure to an investor who has already committed.

There is also the surrounding apparatus to consider. Every Irish fund needs an appointed manager, a depositary, an administrator and auditors, and the QIAIF in particular requires an Alternative Investment Fund Manager that may be internal or, more commonly for emerging managers, a third-party "host" platform. These appointments shape the economics and the timeline as much as the legal form does.

How HPT helps

We help founders and managers move from a strategy and an investor base to a working Irish fund. That means advising on whether an ICAV housing a UCITS or a QIAIF is the right fit, coordinating the manager, depositary, administrator and legal counsel, and keeping the Central Bank file coherent so that authorisation is not delayed by avoidable gaps. We also help weigh Ireland against alternative domiciles where the facts point elsewhere.

If you are considering an Irish fund and want a clear view of which structure serves your strategy, we would be glad to talk it through.