Quick answer
You are a Luxembourg tax resident in 2026 if you keep and use a home there, or stay more than six consecutive months. Residents are taxed on worldwide income, non-residents only on Luxembourg income. Treaties settle dual-residence cases, and commuters keep a 34-day work-abroad tolerance.
Last reviewed: November 2026 · Reviewed by Stéphane Gombauld, tax expert, technologist and digital nomad
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Check my tax setup →You split your time between Luxembourg and somewhere else, and you need to know which country can tax you. After this guide, you will know the two legal tests and how treaties break ties. You will also know how non-residents are taxed and which proof works.
Luxembourg tax residency rules in 2026: the key figures
| Item | 2026 rule | Legal basis |
|---|---|---|
| Resident status | Fiscal domicile or habitual abode in Luxembourg | Art. 2 LIR |
| Fiscal domicile | A dwelling held in conditions showing you will keep and use it | § 13 StAnpG |
| Habitual abode | Stay that is more than passing; above six consecutive months it is automatic | § 14 StAnpG |
| Residents taxed on | Worldwide income | Art. 2 LIR |
| Non-residents taxed on | Luxembourg-source income listed in the law | Arts. 2 and 156 LIR |
| Assimilation to residents | 90% of worldwide income taxable in Luxembourg, or foreign income under EUR 13,000 (Belgian residents: 50% alternative) | Non-resident assimilation rules, form 100 (Guichet.lu) |
| Cross-border work tolerance | 34 days a year for residents of France, Belgium and Germany | Tax treaties, ACD FAQ |
| Certificate of residence | Issued free by the ACD, in French, German or English | ACD procedure (Guichet.lu) |
What changed for 2026
- Legal tests unchanged. Article 2 LIR still defines residence by fiscal domicile or habitual abode, per the ACD's consolidated LIR text at 1 January 2026.
- New France circular. The ACD issued circular L.G. – Conv. D.I. no. 61 of 24 June 2026 on applying point 3 of the France treaty protocol, replacing the 2020 version (Législation 2026).
- Same tolerance days. The 34-day limits for France, Belgium and Germany are unchanged since 2024, per the ACD non-resident FAQ.
Is this guide for you?
Read on if you…
- live partly in Luxembourg and partly abroad;
- work remotely and are not sure which country can tax your income;
- need to defend your status in an audit, a bank KYC check or a treaty claim.
Probably not your case if you…
- just want the move-in checklist (read how to obtain tax residency in Luxembourg);
- have never lived, worked or owned assets in Luxembourg.
What are the two tests for Luxembourg tax residency?
Article 2 LIR (loi concernant l'impôt sur le revenu, the income tax law) uses two alternative tests. Meeting one is enough. Both terms are defined in the 1934 Steueranpassungsgesetz (StAnpG, tax adaptation law).
| Test | Plain-words meaning | Typical evidence | Common trap |
|---|---|---|---|
| Domicile fiscal (§ 13 StAnpG) | You hold a home in conditions showing you will keep and use it | Lease or deed, utility bills, furniture, commune registration | A flat kept "just in case" can still count |
| Séjour habituel (§ 14 StAnpG) | You stay in a way that is not merely temporary; above six consecutive months it is automatic | Travel data, work location, lease dates | Short trips abroad do not reset the count |
Fiscal domicile: the home test
The ACD's definition looks at whether you will keep and use the dwelling. Ownership is not required, and neither is a minimum number of nights.
In practice, a home let to a tenant under a real lease is not "used" by you. A furnished flat you return to between trips usually is.
Habitual abode: the presence test
The ACD defines habitual abode as staying somewhere in circumstances showing you remain there not just in passing. § 14 StAnpG adds a bright line: a stay of more than six consecutive months makes you resident. It applies even when the stay overlaps two calendar years or includes short absences (PwC, secondary).
What does not decide it
A residence permit alone does not make you a tax resident, the ACD confirms. It adds that a person whose centre of vital interests is abroad is, in principle, non-resident, whatever the address.
What happens if two countries claim you?
Each country applies its own law first. If both treat you as resident, the treaty decides. Luxembourg's treaties follow the OECD model, which the ACD cites as its reference. The usual tie-breaker order is:
- Permanent home – where a home is available to you at all times.
- Centre of vital interests – where your personal and economic ties are closer.
- Habitual abode – where you stay more often.
- Nationality – then a mutual agreement between the two tax authorities.
Honestly? For most remote workers, step 2 decides. See Luxembourg's international tax treaties for the network, or compare with Malta's residency rules.
How are non-residents and cross-border workers taxed?
Non-residents pay tax only on the Luxembourg income listed in article 156 LIR. Typical items:
- salary for work done in Luxembourg;
- rent from property located in Luxembourg;
- dividends from Luxembourg companies, with 15% withholding under art. 146 LIR, reducible under a treaty;
- in some cases, gains on substantial shareholdings (over 10%) in Luxembourg companies, unless a treaty gives them to your country of residence.
The assimilation option
Non-residents can ask to be taxed like residents. Guichet.lu sets the alternatives: at least 90% of your worldwide income is taxable in Luxembourg, or your foreign net income stays below EUR 13,000. Belgian residents also qualify if 50% of household professional income is taxable in Luxembourg.
For the 90% test, salary taxed abroad for up to 50 days worked outside Luxembourg still counts as Luxembourg income. You opt in on form 100. It does not change your residence status.
The tolerance days
Cross-border workers (frontaliers) stay non-resident. The ACD FAQ lists 34 days a year of work outside Luxembourg for residents of France, Belgium and Germany. At or below that, Luxembourg taxes the whole salary. Above it, Luxembourg loses the right to tax every day worked outside, not just the excess.
Example – Sofia, 41, French resident working in Luxembourg
Sofia earns EUR 90,000 for 220 working days in 2026. She teleworks 40 days from Metz, above the 34-day tolerance. Luxembourg keeps 180/220 of her salary: 90,000 × 180 ÷ 220 = EUR 73,636. France taxes the other EUR 16,364. For the assimilation test, those 40 days fall within the 50-day allowance, so 100% of her salary counts as Luxembourg income. With no other income, she passes the 90% test and can opt on form 100 to be taxed like a resident. Had she stayed at 34 days, Luxembourg would have taxed all EUR 90,000.
Sofia's year hinged on six extra telework days. Yours may hinge on something just as small.
Get your residency and day count checked before two countries both send you a bill.
Check my tax setup →How do you prove your residence status?
The ACD issues a certificate of tax residence free of charge. You give your name, tax file or national ID number, address, the requesting authority and the purpose. It comes in French, German or English.
Here's the catch. The ACD may check that you have no unpaid taxes. If your status is doubtful, it can refuse and settle the question at your first return.
Keep a file per year: lease, commune registration, travel log, employment contract and tax card. Your residence year also drives the split-year rules explained in how to cease your Luxembourg tax residency.
Common mistakes (and what they cost)
- Relying on a 183-day count → Luxembourg uses the home test, so a used flat makes you resident on worldwide income regardless of days.
- Staying "temporarily" for seven months → the six-month rule makes you resident on worldwide income, with a return to file for that year.
- Cross-border workers exceeding 34 telework days → part of the salary becomes taxable at home, with back tax and interest if payroll was wrong.
- Not asking for assimilation → a non-resident couple with income mostly in Luxembourg forgoes resident deductions and credits.
- No residence certificate → foreign payers keep withholding at full domestic rates instead of treaty rates.
Frequently asked questions
What is the 183-day rule in Luxembourg?
Luxembourg's domestic law has no 183-day rule. It uses the home test and a stay of more than six consecutive months under § 14 StAnpG. The 183-day count appears in tax treaties, but only to decide which country taxes salary for work done abroad. It does not by itself make you resident or non-resident.
Can I be tax resident in Luxembourg and another country at the same time?
Yes. Under domestic law, both countries can claim you. The treaty then breaks the tie, checking in order your permanent home, your centre of vital interests, your habitual abode and your nationality. If none decides, the two tax authorities settle it by mutual agreement. Luxembourg's treaties follow the OECD model for this.
Does registering at the commune make me tax resident?
Not by itself. Residence depends on facts: a home you keep and use, or a stay of more than six consecutive months. Registration usually matches those facts, so it is strong evidence. The ACD also states that a residence permit does not automatically make you resident, and that a centre of vital interests abroad points to non-residence.
How are non-residents taxed in Luxembourg?
Non-residents pay tax only on Luxembourg-source income. Examples are salary for work done there, rent from Luxembourg property and Luxembourg dividends, which bear 15% withholding. They can opt to be taxed like residents. That needs 90% of worldwide income taxable in Luxembourg, or foreign income under EUR 13,000.
How do I get a Luxembourg tax residence certificate?
Apply to the ACD with your identity, tax file or national ID number, address, the authority asking for it and its purpose. The certificate is free and available in French, German or English. The ACD may first check that you have no outstanding tax. If your status is unclear, it can refuse until your first return.
Do cross-border workers become Luxembourg tax residents?
No. If you live in France, Belgium or Germany and commute, you stay non-resident. Luxembourg taxes your salary for work done there. The France, Belgium and Germany treaties each allow 34 days a year of work outside Luxembourg without shifting tax. Above that limit, Luxembourg loses the right to tax the salary for all days worked outside its territory.
Related guides
- How to obtain tax residency in Luxembourg
- How to cease Luxembourg tax residency
- Luxembourg's international tax treaties
- Personal tax deductions and benefits in Luxembourg
- Luxembourg tax landscape overview
- Tax residency rules in Malta
- All country tax guides
Sources
- Résident / non résident – Administration des contributions directes
- Domicile fiscal and Séjour habituel – Administration des contributions directes
- Loi d'adaptation fiscale (StAnpG), §§ 13–14 – Legilux
- LIR, consolidated text at 1 January 2026 – Administration des contributions directes
- FAQ non-residents – Administration des contributions directes
- Opting for tax assimilation – Guichet.lu
- Certificate of tax residence – Guichet.lu
- Luxembourg – Residence – PwC Worldwide Tax Summaries (secondary)
This guide is general information, not personalised tax advice. See how we research and review.
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