Founders agonise over names for weeks and then discover, at filing time, that the register has opinions too. The rules are not complicated, but they are checked at the worst possible moment if you leave them for last.
The availability check
Company names in Luxembourg must be distinguishable from existing registered names. The authoritative check runs against the trade register via the LBR portal, and it happens when your filing is processed. A name too close to an existing one bounces, and a bounced filing is lost days at minimum.
Practical implication: search the register early, shortlist two or three viable names, and hold the alternates in reserve. An electronic name availability certificate can be obtained from the LBR, which is also the clean way to document that your chosen name was free when you started preparing.
What makes a name rejectable
Beyond collisions, a few categories cause friction:
- Misleading names. A name implying a regulated activity you are not licensed for (anything suggesting banking, insurance, or fund management without the corresponding authorisation) invites problems beyond the register.
- Protected terms. Certain words tied to professions or institutions need the right to use them.
- Form mismatch. The legal form belongs with the name in official use: a Sàrl presents itself as such. The register cares about coherence between what you are and what you claim to be.
Accents, cases and small punctuation differences do not make a name distinguishable; "Lux Consult" and "LuxConsult" are, for collision purposes, the same idea.
Name versus brand: two different protections
Registering a company name gives you the right to operate under it. It does not give you a trademark. If the brand matters to your business (and for consumer-facing companies it usually does), trademark protection is a separate track, at the Benelux level or EU-wide.
The inverse also applies: a free company name at the LBR can still collide with someone's existing trademark, and the trademark holder wins that argument. For a name you intend to build value in, a trademark search belongs next to the register search. Worth knowing here: SMEs can get a meaningful part of trademark and design fees reimbursed through the EUIPO SME Fund, which turns brand protection from an expense into a subsidised step.
Trading names
The registered name and the commercial name can differ: a company registered as one thing may trade under an enseigne. Useful for holding several brands under one entity, but keep the paper trail clean, because invoices and contracts must let counterparties identify the legal entity behind the brand. Our invoice requirements guide covers what must appear.
A short pre-filing checklist
- Search the LBR register for collisions, including near-misses.
- Get the availability certificate for your chosen name.
- Run a trademark search (Benelux and EU) if the brand will carry value.
- Check the name works in French and German contexts too; Luxembourg is trilingual and unfortunate meanings surface fast.
- Reserve matching domains before the filing makes your choice public.
Name problems are the cheapest formation problems to prevent and among the most annoying to fix after papers exist. We fold the register and trademark checks into formation preparation so the name that goes on your deed is one that survives contact with reality.