This guide is for fund sponsors and general partners outside the European Union who are looking at Luxembourg for the first time. It is written mainly from the US perspective, because that is the most common case, but the analysis is the same if you are in London, Singapore, Dubai, Hong Kong, Toronto or São Paulo. It assumes you know how funds work. It assumes you do not know much about Luxembourg.

Most material written about Luxembourg falls into one of two categories. Either it is written by Luxembourg practitioners for other Luxembourg practitioners, and uses a vocabulary you have no reason to possess. Or it is written to sell you something, and tells you Luxembourg is the answer before establishing the question.

This guide takes a third approach. It translates. Where you have a Delaware limited partnership or a Cayman exempted limited partnership, we tell you what the Luxembourg equivalent is, where it behaves the same, and, more usefully, where it does not. Where Luxembourg is the wrong answer, we say so.

What this guide covers, and what it doesn’t

This guide is about one thing: forming a fund vehicle in Luxembourg and raising European capital into it. It covers vehicle choice, the manager, marketing, substance, cost and documentation.

It also assumes you are building a fund to raise capital from third parties. If you are a family office deploying family wealth, or a group of investors doing a single deal together, the first question is not which Luxembourg vehicle to use – it is whether you have a fund at all. That question will be answered separately in our separate posts.

What this guide says, in short

Most non-EU sponsors do not need to move to Luxembourg. They need to add a Luxembourg vehicle alongside the fund they already have, in order to accept European capital. That decision is driven by investor demand and EU marketing rules, not by tax. It is worth doing when you have genuine European commitments in prospect, and not worth doing before then.

• Part 1: Why non-EU sponsors end up in Luxembourg, and when they shouldn’t. You are not choosing a domicile, you are adding a sleeve. What actually triggers the decision, what Luxembourg buys you, and the cases where the honest answer is to stay where you are.

• Part 2: Your Delaware or Cayman fund, in Luxembourg terms. The special limited partnership beside the structures you already know. What carries across from your existing partnership agreement, and which provisions your counsel will draft out of habit that do not work here.

• Part 3: Regulated or not. Choosing a fund regime. The regimes are rungs on a ladder, not items on a menu. Each step up buys a wider investor base and costs a specific freedom. Where the unregulated partnership, RAIF, SIF, SICAR, Part II UCI and ELTIF actually sit, and what each one forbids.

• Part 4: The manager question: build, rent, or stay small. European regulation attaches to the manager, not the fund, and your existing management company cannot be that manager. Whether to appoint a host, establish your own EU-authorised one, or stay below the threshold and accept a narrower reach, and how much of your autonomy survives the delegation arrangement.

• Part 5: How you are actually allowed to raise. The part that most often surprises non-EU sponsors: an unregulated fund does not give you unregulated fundraising. What pre-marketing permits and what it costs for the eighteen months afterwards, why reverse solicitation is a defence rather than a plan, and the three routes that exist.

• Part 6: Substance: what Luxembourg actually asks of you. Substance is one notion, but not one requirement: it is assessed by different audiences at three different levels of your structure. This part separates them, and shows why the level your fund lawyer covers is the one least likely to go wrong.

• Part 7: What it costs, and how long it really takes. Not a price list, but what drives the cost: what you are buying, the seven factors that move it, the arithmetic that decides whether it clears, and why the regulator is almost never what delays you.

What this guide will not do

It will not tell you Luxembourg is the leading fund domicile in Europe. That is true, easily verified elsewhere, and of no use to you on its own. It will not give you a tax opinion, as your position depends on your investors, your assets and your existing structure, and anyone who tells you otherwise in a published article is not being careful. And it will not pretend the decision is obvious. For a meaningful number of sponsors who read this, the right conclusion will be not yet.

The Bottom Line: Luxembourg is a tool with a specific job, namely, accepting European institutional capital without asking those investors to do something their own rules make difficult or impossible. If that is your problem, this guide will help you work out what it costs to solve. If it isn’t, the guide should save you a great deal of time and money.

Last updated 18 October 2026.

Disclaimer: Library articles are provided for general information purposes only and do not constitute legal advice. Accessing or relying on them does not create a lawyer-client relationship. Readers should seek advice on their specific circumstances before acting.