For a fund manager weighing a Mauritius domicile, custody arrangements are rarely the last item on the checklist – they are often the one that determines whether the structure works at all. Under the VAITOS Act 2021 (Virtual Asset and Initial Token Offering Services Act), Mauritius has established a defined regulatory regime for virtual-asset businesses, and the custody of digital assets held by a fund sits squarely within its perimeter. The applicable requirements interact with the fund's domicile choice, its investor base, its administrator, and the banking relationships that sit around the structure. Getting that interaction wrong at the outset creates friction that is expensive and slow to correct.
This page sets out the regulatory basis for fund custody in Mauritius, the practical steps for arranging it, the cross-border considerations that most inbound fund managers encounter, and the decision points that determine which approach is right for a given structure.
What does custody mean under the Mauritius digital-asset regime?
Custody of digital assets for a fund in Mauritius means holding, controlling, or safeguarding virtual assets – or the private keys that give access to them – on behalf of the fund and its investors. Under the VAITOS Act 2021, that activity constitutes a regulated virtual-asset service, and the entity performing it must be licensed by the Financial Services Commission (FSC), the primary regulator for non-banking financial services in Mauritius. The act covers a defined list of virtual-asset services, and custody sits within them.
The FSC has developed a licensing framework that distinguishes between the fund vehicle, the fund manager, and the custodian. These may, in some structures, be separate legal entities. A Mauritius-licensed global business company (GBC) is the typical fund vehicle. The manager may be domiciled in Mauritius or in another jurisdiction – subject to the FSC's manager-licensing or exemption requirements. The custodian, if providing regulated custody services to a Mauritius fund, generally needs to be a licensed virtual-asset service provider (VASP) under the VAITOS Act or a licensed financial institution under the applicable FSC regime.
In our cross-border practice, we see fund managers underestimate how the custodian's regulatory status affects the fund's own regulatory standing. An unregulated custodian – even a technically competent one offshore – can create structural deficiencies that the FSC or institutional investors will flag at due diligence. The custodian is not a back-office detail; it is part of the regulated chain.
To discuss how custody arrangements interact with your specific fund structure, contact OBOLUS at info@oboluslaw.com. The process above describes the standard path. Your facts – the entity, the investor base, the asset mix – change the analysis materially.
Who needs a formal custody arrangement for a Mauritius fund?
Any collective investment scheme, closed-end fund, or professionally managed vehicle holding digital assets and domiciled or licensed in Mauritius will need to address custody as a regulatory matter, not just an operational one. The FSC expects fund structures to segregate assets, maintain clear title records, and appoint a custodian that meets the applicable standards. Funds marketed to institutional or professional investors face the same expectation from investor due diligence, often before the FSC review reaches the same point.
The relevant actors are straightforward. First, the fund vehicle itself – typically a GBC licensed as a Collective Investment Scheme (CIS) or a Closed-End Fund (CEF) under the Securities Act and the FSC's fund rules. Second, the fund manager or investment manager, whether Mauritius-resident or offshore. Third, the custodian, which holds the assets. Fourth, the administrator, which handles NAV calculations and investor records. Each role carries its own regulatory perimeter, and the FSC will look at the totality of the arrangement when assessing whether the structure is properly constituted.
Funds that hold a mix of traditional securities and digital assets face additional complexity: the custodian for the digital-asset portion may be different from the custodian for the securities portfolio, and reconciling reporting across both is an operational matter that needs to be solved in the fund documents before launch.
How does the FSC regulate custodians under the VAITOS Act?
A custodian providing virtual-asset custody services to a Mauritius fund must hold a VASP licence from the FSC under the VAITOS Act 2021, unless a specific exemption applies. The FSC assesses the applicant's governance, AML/CFT programme, cybersecurity controls, and financial soundness. The applicable requirements align with FATF Recommendation 15 (the standard for virtual-asset service providers) and with the Travel Rule obligation to transmit originator and beneficiary information on qualifying transfers.
The FSC has categorised virtual-asset services by type, and custody is a discrete category. An entity applying for a VASP licence to provide custody services submits a business plan, governance documents, compliance policies, a description of the technical infrastructure (including cold and hot wallet arrangements), and evidence of the fit-and-proper status of its management. The FSC reviews the application and may request supplementary information. Timelines vary; the FSC has made efforts to improve processing speed, but applicants should plan for a period of several months from submission to licence grant for a new applicant without prior regulatory history in Mauritius.
A custodian already licensed in a recognised jurisdiction – such as the ADGM in Abu Dhabi, Singapore under the MAS Payment Services Act, or a EU member state under a transitional MiCA arrangement – may seek to rely on that regulatory standing in structuring the Mauritius arrangement, though the FSC will make its own assessment. We advise clients not to assume recognition without confirmation from the FSC.
What is the application process and indicative timeline for arranging compliant custody?
Structuring compliant custody for a Mauritius fund involves parallel workstreams: the fund vehicle setup, the manager licensing or exemption, and the custodian appointment. Getting these right requires sequencing them correctly.
The typical process runs as follows. The fund sponsors first determine the fund type – CIS, CEF, or another vehicle – and instruct Mauritius counsel to draft the constitutional documents and the prospectus or offering memorandum. At the same time, the custodian is identified and, if not already FSC-licensed, begins its own VASP licence application. The manager prepares its own regulatory submission if it is seeking a Mauritius licence, or documents the exemption basis if managing from offshore. The FSC reviews the fund application, and as part of that review examines the custodian arrangement. An unlicensed or inadequately documented custodian will stop the fund review.
From first instruction to fund launch, the overall process – assuming a well-prepared application, an experienced custodian, and no material regulatory queries – typically runs from several months to approximately a year. Delays arise most often from custodian licensing gaps, incomplete AML documentation, or mismatches between the offering memorandum and the regulatory categorisation of the assets.
Operators we advise routinely underestimate the custodian bottleneck. Identifying and engaging a compliant custodian early – ideally before the fund application is filed – saves material time.
If a prior application stalled or a custodian relationship fell through, a second read can surface the structural reason and the route forward. Write to info@oboluslaw.com.
How do tax and banking interact with custody arrangements for a Mauritius fund?
The choice of Mauritius as a fund domicile carries tax consequences that are inseparable from the custody and structural decisions. Mauritius has an extensive network of double-taxation treaties, and the GBC structure – properly maintained – can access treaty benefits on income flows from certain jurisdictions, particularly in Africa and South Asia. However, treaty access depends on substance: the fund or manager must maintain genuine economic presence in Mauritius, with decision-making, directors, and records genuinely located there. A GBC that exists only on paper will fail a treaty abuse analysis under OECD standards and under the FSC's own substance rules.
Digital-asset funds face a further layer: the tax treatment of gains, income, and staking rewards from digital assets is not uniform across jurisdictions. Mauritius does not currently impose capital gains tax at the fund level under its general framework, but investors' home-country tax rules apply to distributions and redemptions, and withholding tax positions vary. The custody arrangement itself has tax relevance: where assets are held, who holds the keys, and how transfers are recorded affect the source-of-income analysis in several treaty contexts.
Banking is the other structural constraint. Mauritius has a functioning banking sector, but digital-asset funds face the same de-risking pressures that affect the sector globally. Banks in Mauritius will conduct their own due diligence on the fund's digital-asset exposure, the custodian's standing, and the origin of the assets. A fund with a licensed, documented, reputable custodian is materially easier to bank than one relying on an informal arrangement. In our practice, we have seen banking relationships fall through late in the process because the custody documentation was not in order. Structuring the custodian appointment correctly at the outset is part of the banking preparation, not separate from it.
For Mauritius funds with managers or investors in the UAE, the interaction with ADGM and VARA-regulated entities is a common cross-border question. The legal treatment of assets held in custody in Mauritius for a fund managed from the DIFC or ADGM raises questions of regulatory deference, reporting, and contractual governing law that require coordinated advice across both regimes.
Which fund profile matches which custody structure in Mauritius?
Not every fund that considers Mauritius needs the same custody structure. The right approach depends on the fund's investor profile, asset composition, and growth trajectory.
Profile A – Single-manager digital-asset fund, institutional investors, predominantly liquid tokens. This profile suits a GBC structured as a CIS, with a standalone VASP-licensed custodian based in Mauritius or in a recognised jurisdiction with a documented cross-border service arrangement. The fund documents should address the custodian's segregation obligations explicitly. Timeline from instruction to launch: typically several months to a year, assuming the custodian is already licensed.
Profile B – Multi-strategy fund, mixed digital and traditional assets, diverse investor base including African institutional capital. This profile benefits most from Mauritius's treaty network and its position as a gateway into sub-Saharan African markets. The custody arrangement needs to accommodate both asset classes, which generally means a dual-custodian model or a custodian with both securities-holding and virtual-asset capabilities. The FSC's review will be more detailed, and the fund documents more complex. Timeline is longer and should be planned accordingly.
Profile C – Venture-style fund, illiquid digital-asset positions, closed-end structure. A Mauritius CEF (closed-end fund) is the natural vehicle. Custody of illiquid positions – early-stage tokens, SAFTs, or equity-linked instruments – is structurally different from custody of liquid tokens: valuation methodology, reporting frequency, and key-management procedures are all different. The custodian must be capable of handling these positions, and the fund documents must clearly define the valuation process. This is the profile most likely to require bespoke custodian drafting.
In each case, the wrong domicile or a poorly specified custody arrangement locks in tax leakage and limits which investors the fund can accept. Correcting the structure after investors are in is costly and disruptive.
What are the most common mistakes in fund custody arrangements in Mauritius?
Several recurring errors account for most of the delays and regulatory queries we see in Mauritius fund custody matters.
The first is appointing a custodian that is not FSC-licensed and assuming the licensing process will complete in time for the fund launch. It rarely does. The custodian's licence application and the fund application run on different tracks, and if the custodian is not ready, the fund cannot launch in compliance. The fix – replacing the custodian mid-application – adds months.
The second is treating the custody agreement as a boilerplate document. The FSC, and institutional investors, will read the custody agreement carefully. Weak segregation language, unclear default procedures, and vague key-management provisions create problems at due diligence and at review. Custody agreements for digital-asset funds need to be written specifically for digital assets, not adapted from a securities-custody template.
The third is ignoring the interaction between the custodian's jurisdiction and the fund's tax structure. A custodian based in a jurisdiction that has a different treaty position from Mauritius can inadvertently create a taxable presence or affect the source characterisation of income. This is a structuring question, not just a compliance question, and it needs to be addressed before the custodian is appointed.
A common assumption in this market is that any offshore vehicle works equally well for a digital-asset fund. It does not. Mauritius offers specific advantages – the treaty network, the FSC framework, the GBC structure – but only to funds that are properly constituted and managed with genuine substance. A Mauritius structure that is not substantively operated in Mauritius will fail treaty claims and faces regulatory risk.
A custody restructuring in practice
In a recent matter, a fund manager seeking to launch a digital-asset CIS in Mauritius came to us after an initial application had stalled. The underlying issue was that the appointed custodian held a licence from a non-recognised jurisdiction and had not applied for FSC registration. The fund's offering memorandum described the custodian as "regulated" in a way that was technically accurate but insufficient for FSC purposes. We restructured the custodian appointment, introduced an FSC-registered custodian on an interim basis pending a full licence application by the preferred custodian, and revised the fund documents to accurately reflect the arrangement. The FSC review resumed, and the fund launched in the following quarter. The cost of the restructuring – in time and in legal fees – substantially exceeded what a correct initial appointment would have required.
Related at OBOLUS
Related at OBOLUS
- Funds and investment vehicles for digital-asset businesses – the full practice overview covering domicile, structuring and regulatory strategy for crypto funds globally.
- Fund manager licensing for institutional clients – how we manage the manager-licensing process across Mauritius and other leading fund hubs.
- Fiat on/off-ramp banking in Abu Dhabi Global Market (ADGM) – banking strategy for funds with a UAE nexus and cross-border digital-asset flows.
FAQ
Where should a crypto fund be domiciled?
The right domicile depends on the investor base, asset type, tax profile, and regulatory environment. Mauritius suits funds targeting African and Asian institutional capital, given its treaty network and FSC framework. Other hubs – Cayman, BVI, ADGM – fit different investor profiles. There is no universal answer. The wrong choice creates tax leakage, limits investor access, and can require costly restructuring. We match domicile to the specific fund profile rather than applying a default.
Does a digital-asset fund manager need a licence?
In most major fund jurisdictions, yes. In Mauritius, a manager conducting collective investment management must be licensed by the FSC or fall within a defined exemption. Managing from offshore does not automatically avoid Mauritius regulatory requirements if the fund is Mauritius-domiciled and marketed to investors. Other hubs – Singapore under the MAS regime, the ADGM under the FSRA framework – have their own manager-licensing requirements. Assuming an exemption applies without confirming it with counsel is a common and costly mistake.
How is custody arranged for a crypto fund?
For a Mauritius-domiciled fund, custody of digital assets must be provided by a custodian that is licensed under the VAITOS Act 2021 by the FSC, or by an equivalent regulated entity under a documented cross-border arrangement that the FSC considers acceptable. The custody agreement must specifically address digital-asset segregation, key management, and default procedures. Custody is a regulated activity, not a purely operational one. Appointing an unlicensed custodian is a structural deficiency that prevents a compliant fund launch.
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 – and we structure licensing, banking and tax as one mandate rather than three disconnected workstreams. To discuss your fund structure, contact info@oboluslaw.com.
By Lydia Brennan, Tax & Structuring Analyst – specialising in fund domicile strategy, cross-border tax structuring and regulatory setup for digital-asset investment vehicles in Mauritius and across the major fund hubs.
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.