Capital gains tax · Luxembourg
Get matched with a capital gains tax lawyer in Luxembourg
Selling shares, a flat or a business interest can raise difficult questions about what the Grand Duchy taxes and how it is reported. We put your situation in front of lawyers who handle capital gains and cross-border tax work in Luxembourg, so you can decide with proper country-specific guidance.
- Specialist tax and private-client lawyers across the Grand Duchy
- Fees agreed directly with the lawyer, legal aid where means are insufficient
- Free matching, no obligation to instruct anyone
Free and without obligation. We never invoice you for the match.
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Why this page exists
A gain can come from very different places
A capital gain can arise from very different things: shares in a company, a flat you rent out, a plot of land, or an interest in a business that is sold. In Luxembourg, whether and how that gain is taxed depends on your residence status, the source of the income and the treaties that apply, and the paperwork is handled in French before courts that follow a continental civil-law model. Rather than guessing, you can work with a capital gains tax lawyer in Luxembourg who deals with these questions daily. We are a matching service: you tell us what happened, we compare your situation with lawyers registered with the Barreau de Luxembourg or the Barreau de Diekirch, and you choose whether to go ahead. The match is free.
Local context
How capital gains questions are handled in Luxembourg
Luxembourg combines a continental civil-law system inherited from the French Napoleonic Code with an unusually international population. That mix shapes how a disposal is taxed, which authority decides a dispute and which language the file will run in.
Who is allowed to advise you
In Luxembourg, only lawyers registered on the roll of one of the two Bars — the Barreau de Luxembourg or the Barreau de Diekirch — may give legal consultations as a habitual paid activity, and they are the only professionals admitted to represent parties before the courts. They are bound by professional secrecy protected by criminal law.
Tax disputes follow the administrative order
Challenges to tax assessments and comparable administrative decisions do not go to the ordinary civil courts. They are heard by the Administrative Tribunal at first instance and, on appeal, by the Administrative Court. An action must be lodged with the Administrative Tribunal within three months, which makes early advice valuable.
Residence decides who taxes what
A resident taxpayer is taxed on worldwide income, whereas a non-resident is taxed only on Luxembourg-source income. Residence turns on having a fiscal domicile or habitual residence in the Grand Duchy — holding a residence permit does not by itself create it. Treaties based on the OECD model then relieve double taxation by exemption or credit.
Property sales and the notarial deed
Where immovable property changes hands, the transfer must be recorded in an authentic notarial deed to be opposable to third parties and capable of transcription in the mortgage register. A private compromis de vente binds the parties, but only the notarial deed gives third-party protection and secures the registration used for financing.
Working language of the file
Luxembourg’s three administrative languages are French, German and Luxembourgish. Procedural documents must be drafted in French, while hearings may be conducted in any of the three and court-provided translation is paid for by the State. Legislation, judgments and contracts are also commonly drafted in French.
What proceedings cost, and legal aid
Luxembourg levies no court fees payable to the State for bringing proceedings, so the substantial cost is legal representation together with notaries, bailiffs and experts. Lawyers’ fees are freely agreed with the client, and legal aid may cover all or part of the cost for persons of insufficient means.
All country-specific details on this page are drawn from official Luxembourg institutions, Legilux, the two Bars and the European e-Justice portal; each statement can be checked through the links above.
- National justice systems — Luxembourg, European e-Justice Portal
- The legal profession — Ministry of Justice, Luxembourg
- Lawyers’ fees and legal aid — Guichet.lu
- Residents and non-residents — Administration des contributions directes
- Notarial deed and property transfers — Guichet.lu
- Administrative court proceedings — Guichet.lu
- Civil Code (limitation periods) — Legilux
Common concerns
What clients usually bring to us
Three situations come up again and again when a disposal has a Luxembourg element.
Unclear what Luxembourg actually taxes
You have sold shares, a plot or a company interest and cannot tell which part of the gain concerns the Grand Duchy, which treaty applies, or what your residence status means for reporting.
Cross-border facts complicate the picture
You live abroad, own Luxembourg assets, or hold shares through a foreign company. Residence and source rules then decide who taxes what, and the answer needs a lawyer who works with both sides.
Paperwork runs on French and tight deadlines
Procedural documents in Luxembourg are drafted in French, and administrative proceedings must generally be brought before the Administrative Tribunal within three months. Missing that window can end the dispute before it starts.
How we help
What you get from the match
A short, structured introduction to lawyers who already work with this kind of file.
Lawyers registered with a Luxembourg Bar
Only lawyers on the roll of the Barreau de Luxembourg or the Barreau de Diekirch may give legal consultations as a paid activity, so you are matched with someone entitled to advise and act in the Grand Duchy.
Experience with the administrative courts
Tax disputes in Luxembourg go before the Administrative Tribunal at first instance and the Administrative Court on appeal. We match you with a lawyer used to that order of courts and to the three-month window for bringing a claim.
Fees agreed with the lawyer, not with us
There is no binding official tariff for lawyers’ fees in Luxembourg; the lawyer sets them in agreement with you under the 1991 law on the legal profession. If your means are insufficient, legal aid may cover part or all of the cost.
Matching is free and without obligation
You describe the situation once, we compare it with lawyers who handle capital gains and cross-border tax work, and you decide whether to instruct. The match itself costs you nothing.
Also available in
Cross-border matters across Europe
If your assets, your residence or your company sit outside the Grand Duchy, we can look for lawyers in the other European jurisdictions involved in your file.
Questions and answers
Capital gains tax in Luxembourg: what clients ask
Do I need a capital gains tax lawyer in Luxembourg if I sell property here?
The sale of immovable property in Luxembourg must be recorded in an authentic notarial deed to be opposable to third parties and capable of transcription in the mortgage register. A lawyer can look at how the disposal is treated for your personal tax position and, where a dispute arises, represent you before the administrative courts.
Are non-residents taxed on gains connected with Luxembourg?
A resident taxpayer is taxed on worldwide income, whereas a non-resident is taxed only on Luxembourg-source income. Holding a residence permit does not by itself create tax residence. Where you are resident matters, so a lawyer will look at your fiscal domicile or habitual residence and at the applicable bilateral treaty, which follows the OECD model.
Which courts decide tax disputes in Luxembourg?
Administrative litigation sits in a separate order from the ordinary courts. The Administrative Tribunal hears cases at first instance and the Administrative Court on appeal. An action against an administrative decision must be brought before the Administrative Tribunal within three months, so the timing of the challenge is usually the first point to check.
How are lawyers’ fees set in Luxembourg?
There is no binding official tariff. The lawyer determines the fee in agreement with the client under Article 38 of the Law of 10 August 1991 on the legal profession, taking account of the difficulty of the matter, the result obtained and the client’s financial situation. Disputes over fees can be brought before the Bâtonnier.
Can I obtain legal aid for a tax case?
Legal aid (assistance judiciaire) is available to natural persons of insufficient means in civil, commercial and administrative cases, and it can cover lawyers’, notaries’, bailiffs’ and translators’ fees. It may be total or partial. The application is decided by the Bâtonnier of the Bar of your place of residence, using the form available from the Central Social Assistance Service.
In which language will my Luxembourg case be conducted?
Luxembourg has three administrative languages — French, German and Luxembourgish. Procedural documents must be drafted in French, but hearings may be held in any of the three, and court-provided translation is paid for by the State. If you do not work in French, tell the lawyer early so the file is prepared accordingly.
Next step
Describe your situation and get matched free
Tell us what was sold, where you live and where the asset sits. We will compare your file with lawyers registered in Luxembourg who handle capital gains and cross-border tax work, and you decide whether to instruct one of them.