Custody arrangements for funds in Ireland

A fund manager evaluating Ireland as a domicile for a digital-asset vehicle quickly confronts a structural question that determines the deal: who holds the assets, under what regime, and whether that arrangement satisfies institutional investors, the Central Bank of Ireland and any cross-border regulator whose jurisdiction touches the investor base. Custody arrangements for funds in Ireland sit at the intersection of the Irish funds regime, the EU's Alternative Investment Fund Managers Directive (AIFMD – the EU regime governing alternative investment fund managers and their depositaries), and the emerging digital-asset layer that MiCA (the EU's Markets in Crypto-Assets Regulation) now overlays across the bloc. Getting the custody leg wrong at formation stage means rebuilding the structure later – at cost, and often after an investor query has already surfaced the gap.

Ireland is the largest fund domicile in the EU by assets under administration and one of the leading platforms for alternative investment funds marketed to professional investors across the European Economic Area. For digital-asset funds, the regulated basis for custody in Ireland flows from AIFMD – which mandates an independent depositary for most Alternative Investment Funds (AIFs) – together with the Central Bank of Ireland's supervisory expectations and, increasingly, the MiCA regime's requirements for crypto-asset service providers operating in the custody space. This page sets out the regulated framework, the inbound process, the cross-border interactions with tax and banking that matter most, and the decision point every fund manager faces before launch.

The sections below move from the statutory basis to the practical steps, then to the cross-border angles that most managers underestimate.

What is the custody obligation under Irish fund law?

The core rule is this: an AIF authorised by the Central Bank of Ireland and managed by an authorised Alternative Investment Fund Manager (AIFM) must appoint a depositary to hold its assets and carry out oversight functions. The depositary model in Ireland follows the AIFMD depositary regime – a single regulated entity that is responsible for safekeeping of financial instruments held in custody, record-keeping of other assets, and ongoing supervision of cash flows and fund-level compliance. That obligation cannot be waived by contractual arrangement with investors, regardless of what the fund documentation says.

For a conventional equity or bond fund, the depositary chain is well-established. For a digital-asset fund, the structure raises a set of questions that the conventional chain was not designed to answer cleanly. Who holds the private keys? On which network? Under which regulatory authorisation? Can the depositary delegate to a sub-custodian, and what does that sub-custodian need to be licensed to do? The Central Bank of Ireland has been developing its supervisory posture on these questions as more fund promoters have brought digital-asset proposals through the authorisation gateway.

Under the AIFMD framework as applied in Ireland, financial instruments that are capable of being held in custody must be held by the depositary or a sub-custodian appointed by it. Digital assets that are classified as financial instruments under EU securities law fall squarely into this bucket. Those that are not – utility tokens or certain crypto-assets that fall outside the financial-instruments perimeter – may fall into the "other assets" category, for which record-keeping and title-verification obligations apply rather than strict safekeeping. The classification step is therefore a legal prerequisite, not an administrative formality.

How does MiCA change the custody picture for Irish-domiciled funds?

MiCA introduced a harmonised authorisation pathway for crypto-asset service providers (CASPs) across the EU, including a distinct CASP activity covering custody and administration of crypto-assets on behalf of clients. A depositary or sub-custodian holding crypto-assets that are not financial instruments – but that fall within MiCA's scope – will need to hold or rely on a CASP authorisation for that custody activity, issued by a national competent authority and passportable across the EEA.

The practical consequence for an Irish AIF is layered. The AIFMD depositary obligation and the MiCA CASP custody obligation can sit on the same legal entity if that entity holds both authorisations – and a small number of established depositary groups are building toward that capability. More commonly in current practice, a depositary will appoint a MiCA-authorised CASP as sub-custodian for the crypto-asset layer, while retaining its own depositary liability and oversight role. The Central Bank of Ireland, as both the AIFMD competent authority and (in coordination with ESMA) a MiCA supervisor, oversees both sides of that arrangement.

One nuance that fund managers frequently miss: the MiCA CASP authorisation passport operates at the product level, not merely the entity level. A CASP authorised in one EU member state may passport across the EEA. That means an Irish fund can, in principle, engage a MiCA-authorised sub-custodian based in another EU jurisdiction – but the depositary's due-diligence and liability analysis must address that cross-border delegation explicitly. In our practice, we have seen proposals collapse at the depositary's legal review stage because the cross-border sub-custody arrangement had not been structured with the applicable AIFMD delegation conditions in mind.

For a new digital-asset fund proposer, the practical starting position is this: engage the depositary candidate before submitting the authorisation application to the Central Bank of Ireland. Depositaries in Ireland are highly selective about digital-asset mandates. They conduct their own due-diligence cycle – on the AIFM, the asset types, the custody chain and the liquidity and valuation methodology – before issuing a letter of intent. That letter is typically required as part of the authorisation application. Leaving the depositary conversation to post-authorisation is one of the most common structural errors we encounter.

For a scoped assessment of your fund structure and depositary options, contact OBOLUS at info@oboluslaw.com. The process above describes the standard path. Your facts – the asset mix, the investor base, the manager's existing authorisations – change the analysis materially. Map your options

Which Irish fund vehicles are available for digital-asset strategies?

Ireland offers several regulated fund structures relevant to digital-asset managers, each with its own investor access, leverage and distribution profile. The most commonly used vehicles for professional and institutional digital-asset strategies are the Qualifying Investor AIF (QIAIF – an AIF available only to qualifying investors meeting the Central Bank's eligibility criteria) and the Investment Limited Partnership (ILP – a limited partnership structure that gained renewed regulatory traction following legislative reform). Both can hold digital assets, subject to the custody and valuation conditions discussed here.

The ICAV (Irish Collective Asset-management Vehicle – a corporate fund structure designed for Irish-domiciled funds, with structural advantages for US-investor tax treatment under the US-Ireland tax treaty) is also used for digital-asset funds targeting institutional investors, particularly where US taxable investors are in scope. The ICAV's treaty-compatible structure can reduce withholding friction on income flows – a point that becomes material when the fund holds income-generating digital assets such as staking-reward positions or lending arrangements.

Each vehicle type carries its own minimum subscription thresholds, investor classification requirements and Central Bank authorisation timeline. Those figures are set by Central Bank guidance and are subject to revision; the applicable current requirements must be confirmed with Irish regulatory counsel at the point of structuring. What does not change is the depositary requirement: every authorised AIF in Ireland, regardless of vehicle type, requires a depositary appointment before launch.

What does the inbound authorisation process look like for a digital-asset fund in Ireland?

The Central Bank of Ireland operates a pre-submission engagement model for novel or complex fund proposals – including those with significant digital-asset allocations. Engaging the Central Bank's Markets Authorisation and Supervision Division before lodging a formal application allows the promoter to surface classification questions, depositary-structure concerns and prospectus disclosure points early. That engagement does not guarantee a particular outcome, but it typically shortens the formal review cycle by flagging issues that would otherwise generate queries during the review phase.

The formal authorisation application covers the fund-level documents (prospectus, constitutional document, depositary agreement and any sub-custody arrangements), the AIFM profile and its authorisation status, the investment manager's track record and risk controls, and the service-provider chain including administrator, auditor and legal counsel. For a digital-asset fund, the prospectus and risk disclosure section must address the specific risks of the asset class – custody risk at the key-management level, valuation methodology, liquidity and redemption mechanics, and the regulatory status of the assets held.

Timeline is driven primarily by the completeness of the application and the novelty of the structure. For a well-prepared QIAIF application with a conventional AIFM already authorised in Ireland or another EEA member state, review timelines are generally measured in weeks. For a first-time digital-asset structure or a novel custody arrangement, additional rounds of query and response should be anticipated. Central Bank processing times are published on its website and are reviewed periodically; the applicable current figure controls.

In a recent matter, an asset manager seeking to launch a multi-asset digital fund in Ireland had already engaged an administrator and appointed legal counsel before approaching a depositary. The depositary's internal review of the proposed custody chain – which relied on a non-EU sub-custodian for the Bitcoin allocation – ran in parallel with the Central Bank pre-submission engagement. The depositary raised a delegation-condition concern under the AIFMD framework. We assisted in restructuring the sub-custody chain to route the Bitcoin exposure through a MiCA-authorised EU entity, enabling the depositary letter of intent to issue and the authorisation application to proceed on schedule.

How do tax and banking interact with Irish fund custody for a cross-border digital-asset business?

Tax treatment is a decisive input at the domicile-selection stage, and it is one that fund managers frequently underweight when focusing on regulatory access. Ireland's tax regime for regulated funds operates primarily at the fund-vehicle level: most authorised Irish investment funds benefit from an exemption from Irish tax at the fund level on income and gains, with tax instead arising at the investor level under the relevant fund-taxation regime. The specific mechanics – and the interaction with the fund's distribution model and investor base – are jurisdiction-specific and depend on the treaty network available to the fund and its investors.

For digital-asset funds, two tax interactions warrant particular attention. First, staking rewards and lending income generated within the fund may be characterized differently from capital gains in the investor's home jurisdiction, and the withholding or reporting obligations that flow from that characterization differ. The Irish-US tax treaty position for ICAVs is generally favourable for US institutional investors, but the analysis must be run at the investor-class level, not assumed from the fund's Irish status. Second, VAT on management and custody fees: Ireland applies the VAT exemption for fund management services in line with EU VAT directives, and custody services provided to authorised funds generally qualify – but the application of that exemption to crypto-asset custody, particularly where the assets are not financial instruments, is an area where EU member states have not uniformly converged and where professional advice is essential.

Banking for Irish digital-asset funds presents a separate challenge. Irish-regulated funds have access to the domestic banking system, and major custody and fund-administration banks operate in Dublin. In practice, however, crypto-asset funds face heightened due-diligence requirements from banking counterparties. The fund's AML/CFT programme, the depositary and administrator identities, the asset types and the investor-onboarding procedures are all reviewed. Funds that have gone through the full Central Bank authorisation process – including the depositary appointment and a robust AML/CFT framework – are materially better positioned in the bank onboarding process than those relying on lighter offshore structures. That difference in banking access is, in our view, one of the strongest practical arguments for choosing a regulated Irish vehicle over a lighter alternative.

The Travel Rule (the obligation to pass originator and beneficiary data with a virtual-asset transfer, now embedded in EU regulation following the Transfer of Funds Regulation revision) applies at the CASP level – meaning the fund's custody counterparties must have compliant Travel Rule systems in place for on-chain transfers. For a fund operating across multiple blockchains and multiple custodian relationships, Travel Rule compliance is a systems and contractual requirement that should be scoped at the service-provider selection stage, not retrofitted after launch.

If your fund structure is at the service-provider selection stage and the banking and tax legs have not yet been mapped, contact OBOLUS at info@oboluslaw.com. If a prior structure stalled at the depositary or banking stage, a fresh analysis can identify the structural reason and the route forward. Map your options

What are the most common custody mistakes digital-asset fund managers make in Ireland?

The most consequential error is treating the depositary appointment as a formality. In the conventional UCITS and AIFMD market, depositaries are accustomed to standard asset types and established custody chains. For digital-asset mandates, every depositary in Ireland conducts a bespoke commercial and legal review of the proposed arrangement before agreeing to act. That review takes time – often longer than the Central Bank's own review timeline – and it may conclude in a declination if the asset mix or custody structure does not meet the depositary's internal risk appetite. Managers who begin the depositary process early, and who are prepared to adjust the custody structure in response to depositary feedback, have a structurally stronger path to launch.

A second common error is the assumption that a fund domiciled offshore – in a jurisdiction without a depositary mandate – and later seeking EU distribution can retrofit an AIFMD-compliant depositary arrangement. The AIFMD third-country regime, which governs the marketing of non-EU AIFs to EU professional investors, requires member state-by-member state national private placement regime access, and the regulatory conditions for that access vary. Ireland does not operate a national private placement regime in the same manner as some other EU member states. A manager who built the fund structure offshore without the AIFMD custody layer, and who then seeks to access Irish or broader EU institutional investors under a national private placement route, will find the path narrower than anticipated.

Third: the assumption that any offshore vehicle works equally for a digital-asset fund. This is the most persistent myth we encounter. Investor-level tax treatment, institutional investor eligibility, depositary-liability protection and banking access all differ materially between a regulated Irish AIF and an offshore alternative – even one structured in a jurisdiction with its own VASP regime. The regulated Irish vehicle is more demanding to establish, but it is the structure that institutional allocators in Europe require, and the gap in investor access between the two paths is not marginal.

Self-assessment: is your fund's custody structure Ireland-ready?

Before engaging the Central Bank's pre-submission process, a fund promoter should be able to answer the following questions with a degree of precision. First: have the assets been classified – financial instruments or non-financial-instrument crypto-assets under MiCA scope – and does that classification drive the correct custody chain? Second: has a depositary candidate been approached, and has the depositary confirmed in principle its appetite for the asset types proposed? Third: is the AIFM authorised in Ireland or another EEA member state, or is a new AIFM authorisation required – and if the latter, has the additional timeline been factored into the fund launch schedule?

Fourth: has the sub-custody chain for digital assets been identified, including the regulatory status of each sub-custodian and the applicable AIFMD delegation conditions? Fifth: has the AML/CFT programme been designed at the fund level to address the specific risks of digital-asset flows, including Travel Rule compliance at the CASP layer? Sixth: has the tax position been analysed at both the fund level and the investor-class level, covering income characterization, withholding and the relevant treaty network?

Operators we advise routinely discover at this checklist stage that one or two of these questions cannot be answered without external input – typically the depositary appetite question and the cross-border tax analysis. Those two gaps, identified early, are manageable. Discovered after submission, they generate delays and, in some cases, require structural changes to the fund that affect investor terms already under negotiation.

Related at OBOLUS

• Funds and investment vehicles for digital-asset businesses – the full practice overview: structures, domiciles and regulatory access for digital-asset fund managers.
• Custody arrangements for established operators – how existing fund managers restructure their custody chain for digital-asset allocations.
• Payment institution licensing from a cross-border perspective – the regulatory basis for payment flows supporting fund operations across jurisdictions.

FAQ

Where should a crypto fund be domiciled?

Domicile selection turns on three factors: the investor base the fund intends to serve, the asset mix it will hold, and the redemption and distribution profile. Ireland is the leading EU AIF domicile and offers EEA marketing access via the AIFMD passport for funds targeting professional and institutional investors. Offshore vehicles may offer lighter regulatory requirements but typically restrict banking access and investor eligibility. The wrong domicile can lock in tax leakage and prevent access to institutional allocators. A structured analysis of all three factors before incorporation is essential.

Does a digital-asset fund manager need a licence?

In most cases, yes. A manager operating an AIF in or from Ireland must be authorised as an AIFM by the Central Bank of Ireland – or rely on an authorised third-party AIFM. Below certain AUM thresholds, a registered (rather than fully authorised) AIFM status may be available, subject to conditions. Separately, if the manager provides crypto-asset custody or operates as a CASP under MiCA, those activities carry their own authorisation requirements. The licensing stack depends on the manager's activities, scale and domicile, and should be mapped before structuring the vehicle.

How is custody arranged for a crypto fund?

For an Irish-authorised AIF, custody is arranged through a depositary appointed under the AIFMD framework. The depositary holds financial-instrument assets directly or through appointed sub-custodians, and maintains oversight of other assets including crypto-assets not classified as financial instruments. For crypto-assets in scope of MiCA, the depositary or its sub-custodian must hold a CASP authorisation for the custody activity. The depositary appointment must be in place before the Central Bank of Ireland will authorise the fund, making early engagement with depositary candidates a structural priority for any digital-asset fund promoter.

About OBOLUS

OBOLUS is an independent digital-asset law boutique acting only for businesses. We advise exchanges, custodians, token issuers and funds on licensing across 70+ jurisdictions, on disputes and on-chain asset recovery across 25+ forums, and on the tax, banking and compliance that sit around them. Digital assets are the whole of our practice. We match domicile to investor base, asset mix and redemption profile – ensuring the structure you build is one institutional allocators will accept and regulators will approve. We work alongside forensic partners to convert on-chain evidence into court-ready disclosure applications where fund assets are at risk. To discuss your custody or fund structuring situation, contact info@oboluslaw.com.

By Lydia Brennan, Tax & Structuring Analyst – specialises in fund tax analysis, cross-border structuring for digital-asset investment vehicles and the interaction of EU tax regimes with regulated Irish fund structures.

This publication is general information about the law and does not constitute legal advice. It is not a substitute for advice tailored to your circumstances. OBOLUS accepts no liability for action taken or not taken on the basis of this material. For advice on your situation, contact info@oboluslaw.com.