A company established in Luxembourg must have a registered office on Luxembourg territory. For holdings, special-purpose vehicles and asset-holding companies without their own premises, that registered office is typically obtained through a domiciliation arrangement with an authorised professional. The setup looks administrative from the outside, but it sits inside a precise legal framework and interacts with substance, anti-abuse rules and the full company formation file.

Under the law of 31 May 1999, professional domiciliation is a regulated activity reserved to specific professions, governed by a written convention and tied to continuing AML/KYC obligations.¹ Reading it as a real-estate arrangement underplays both the regulation and the ongoing duties. For a cross-border investor structuring through Luxembourg, the question is never whether an address is available. The question is whether the address, the provider and the surrounding file are robust enough to carry the vehicle through its life cycle.

The 1999 framework and authorised providers

Professional domiciliation in Luxembourg is reserved to a short list of authorised professions. The law covers, in particular, credit institutions, certain professionals of the financial sector (PFS), registered lawyers (avocats à la Cour), statutory auditors, approved statutory auditors and chartered accountants.¹ A party outside this list cannot hold itself out as a domiciliary agent, and any arrangement with a non-authorised provider is legally exposed.

This point drives every subsequent check. A promoter may treat a domiciliation setup as commercially reasonable while the provider has no standing under the 1999 law. The verification belongs upstream, before signing, not at the moment a bank, a tax authority or a counterparty begins to ask why the registered office sits with a party that should not be offering it.

The written convention and the KYC file

The domiciliation relationship rests on a written convention between the domiciliary agent and the domiciled company.¹ The convention is not a formality. It defines the perimeter of the service, the treatment of mail and official correspondence, the access to corporate registers, the allocation of responsibilities and the conditions under which the arrangement can end.

Beyond the convention, the domiciliary agent owes ongoing vigilance under Luxembourg AML/CFT legislation. The identification of the members of the governing bodies, the ultimate beneficial owners and the source of funds must be performed up-front and kept current throughout the relationship. Supporting documentation is retained for at least five years after the end of the relationship.² A company that changes directors, shareholding structure or activity without refreshing its file weakens the legal foundation of its own registered office at the very moment it believes the arrangement is stable.

Domiciliation, substance and effective management

The registered office answers the legal question of where the company is established. It does not answer the economic question of where the company is managed. The two sit side by side and cannot be conflated. For a cross-border holding, the second question is now the more exposed one.

After the formal abandonment of the ATAD 3/Unshell directive proposal in 2025, substance obligations apply through the existing arsenal. The general anti-abuse rule and the principal purpose test embedded in treaty networks continue to operate as benefit-denial tools. Alongside them, mandatory disclosure under DAC 6 and the broader exchange-of-information framework keep reportable cross-border arrangements visible to tax authorities. A SOPARFI or a holding that presents a clean registered office while running its real decision-making elsewhere remains exposed to recharacterisation, denial of treaty benefits and reassessment of eligibility for the participation exemption. Domiciliation does not cure that exposure. It simply ensures that the registered office itself, the piece the 1999 law regulates, is above reproach.

In practice, a domiciliation file and a substance file should be built in parallel, not sequentially. Board meetings with genuine Luxembourg participation, documented investment decisions, local expenses consistent with the activity and corporate registers accessible at the domiciliation address all belong to the same picture.

Domiciliation across vehicle types

Domiciliation fits naturally for structures that hold assets rather than run operations. A SOPARFI whose sole activity is the acquisition and management of participations does not need its own premises, and the law does not require it to have any. The same logic extends to SPFs restricted to private financial assets and to SPVs set up for a specific transaction. Lean treasury entities and IP holdings built around qualifying assets often belong to the same category.

The logic shifts as soon as the company carries out activities requiring a business permit, accepts visitors on a recurring basis, holds physical inventory, runs production facilities or houses permanent staff. A registered office cannot substitute for operating premises when the activity itself presupposes them. In those cases, domiciliation can remain a useful component of the governance setup, for example registered office and corporate secretarial, but it does not carry the full file.

The distinction also matters for real-estate structures. An SCI holding Luxembourg property may use a domiciliation arrangement for its registered office, but the property itself and its operation remain outside the domiciliation perimeter.

Ending the arrangement and registered office continuity

When the domiciliation convention comes to an end, termination must be published at the RCS.³ If the address was that of the statutory seat, the company is left without a legal address until a new arrangement is registered. The consequences are immediate. Administrative mail loses its destination, RCS formalities can stall, banking relationships tighten and counterparties begin to read the gap as a compliance signal.

A planned exit is an operation in its own right. A new registered office should be secured before the existing convention is terminated, and the change of seat should be filed in a way that leaves no window of exposure. Domiciliation ends cleanly only when the replacement arrangement is already in place.

A checklist before signing

A domiciliation file is sound when the following points can be answered in the affirmative:

1. the provider is formally authorised under the 1999 law;
2. the vehicle’s intended activity is genuinely compatible with a domiciliation setup;
3. the written convention describes the service, its limits and the treatment of mail without ambiguity;
4. the AML/KYC file can be built and kept current without friction;
5. the substance question has been addressed separately, with governance and decision-making anchored in Luxembourg where the vehicle requires it;
6. the exit path from the arrangement has been anticipated;
7. the registered office is coherent with the accounting, tax, banking and corporate-secretarial file taken as a whole.

Domiciliation is a precise legal tool, not a convenience. It works when it carries a structure that already makes sense, and it becomes fragile when it is asked to simplify a reality it was not designed to carry. For a holding or an SPV whose decisions belong in Luxembourg, a well-selected registered office inside the 1999 framework, with a serious domiciliary agent and a live KYC file, remains one of the cleanest foundations a cross-border group can put in place. For the operational side of the setup, the domiciliation service page covers the registered office, corporate secretarial and AML/KYC components within the same framework.

Footnotes

1. Loi modifiée du 31 mai 1999 régissant la domiciliation des sociétés, coordinated text on Legilux. ↩ ↩² ↩³

2. According to the administration, the written convention, the identification of governing bodies, the AML/KYC obligations and the documentary retention period are set out on this official page. ↩

3. According to the administration, the end-of-domiciliation regime and its publication at the RCS are summarised on this official page. ↩