How long does it take to set up a company in Luxembourg?

Luxembourg publishes very little about how fast it will work, and a great deal about how fast you must. The only clock whose expiry hands you an answer runs against the Ministry: on a business permit application, the absence of a ministerial reply before the end of the 3-month period counts as a tacit authorisation.

Most of the rest run against you — statutes at the RCS within 1 month of signature, VAT within 15 days, beneficial owners within 1 month, a first employee declared to the CCSS within 8 days. "How long does it take" therefore resolves to one question: how long is your slowest track?

The six statutory periods in the table below were read on guichet.public.lu and Legilux in August 2026. What guichet does not publish is how long an RCS filing takes, and a notary's diary and a bank's compliance review were never the administration's to publish — and those three are what actually set the calendar.

The clocks that are written down

Six statutory periods do most of the work in a normal formation. Two of them run against the Ministry, and the other four run against you. That asymmetry is the timeline story in one line: plan around when does this become late, because that half of the calendar is the half anyone has written down.

Two of those periods carry small print. The permit window can be extended by 1 month where a foreign professional qualification has to be recognised, under article 31 of the law of 2 September 2011. And the RBE month does not run from incorporation: guichet ties it to the moment the entity knew or should have known of the event to be declared. The permit file also carries chancellery duties of €50.

Four tracks, running at once

The permit track. For commercial activity this is the gatekeeper, and the 3-month maximum with tacit authorisation is the only period in the process whose expiry produces an outcome rather than a receipt. The 15-day acknowledgement in the table binds the Ministry too, but acknowledging a file is not deciding it.

The file also grows with the shareholder register, because integrity must be proved by the manager of the business in whose name the permit will be issued; and, where the business is operated as a company, also the person holding the majority of the shares and anyone who can exert a significant influence on the management or administration of the business.

The company track. A Sàrl-S is incorporated by a private deed — a notarised document is not required. A standard Sàrl needs a notarial deed — the company must be formed in the presence of a notary. That puts a diary that is not yours on the critical path.

Publication is not a separate wait once the deed reaches the register: the deed is published in RESA on the day of filing, or on a fixed date chosen by the filer when creating the filing request, within a limit of 15 days after filing.

The banking track. A bank's compliance review runs on the bank's own timetable, and an unbounded step is the one that can quietly become the longest. What a founder can influence is the file: a clear activity description, consistent documents, and a plausible account of where money comes from and goes.

The registration track. Each of these deadlines unlocks something: the VAT number unlocks compliant invoicing, the CCSS declaration unlocks payroll. The RBE declaration protects the permit — a failure to register beneficial owners that has persisted for 6 months is listed among the acts that disqualify a permit holder on integrity grounds.

What blocks what

The dependencies matter more than the durations, and for a Sàrl-S they form a genuine loop. The RCS filing must state the identity of the partners, their precise private or professional address, the number of shares held by each, and the business permit number — so the permit application starts first.

See what company formation includes, from €899

But the articles of association must be registered with the Trade and Companies Register before the permit is definitively granted. The permit both opens the sequence and closes it, which is why permit preparation belongs on the critical path from day one.

Capital used to force banking to the front of a notarial Sàrl. That changed with the Law of 18 May 2026 amending the amended Law of 10 August 1915 on commercial companies, which introduced deferred paying-up of the minimum share capital of limited liability companies.

The deferral runs for 12 months, and it is narrower than it first looks: shares issued on incorporation in consideration for contributions in kind must still be fully paid up at incorporation — only cash contributions can be deferred. The scope differs by form, and for a SARL-S the deferred paying-up option covers the entire share capital subscribed at incorporation. Banking still has to happen before you can be paid, but it no longer necessarily blocks the deed.

Foreign paperwork is the hidden critical path, because it is the one queue you cannot join early enough: permit holders non-resident or resident under 10 years need a notarised non-bankruptcy declaration (under 6 months) plus criminal-record extracts from every state of residence of the last 10 years. Only you can make those requests, and only another country's administration can answer them.

Two smaller traps are easy to miss. The name-availability certificate promises less than its name suggests. It is valid from the moment it is issued until the name is entered in the RCS — but it does not reserve the name: any available name may be taken by the first person who requests it when registering with the RCS. The electronic certificate also has to be downloaded within 20 days.

And the address is not a formality: a company without its own premises may, under certain conditions, be domiciled with a third party and fix its registered office there — but guichet states this suits only companies whose activity does not require their own premises, and expressly not a commercial company which the law requires to have a physical establishment in Luxembourg; to count as a stable establishment a company must occupy real premises of its own.

Three realistic pictures

The prepared founder. Documents in hand, an unregulated service activity, a settled address. The permit file goes in complete, and the company and banking tracks run alongside it rather than behind it. Nothing in this picture adds a round-trip, which leaves the 3-month permit window as the only clock still running.

The ordinary case. A permit file still being assembled, a notary to schedule, a bank review in progress. Here the time goes into round-trips rather than into decisions: a file submitted without one supporting document comes back and waits on you, and nothing moves again until you return it.

The complicated case. A non-EU founder, criminal records from several states, a regulated activity. The calendar is set outside Luxembourg entirely, and the 3-month window may never be the binding constraint.

A maximum is published; an actual duration is not. What preparation changes is not the Ministry's speed but the number of round-trips, and a file that is complete on first submission donates no weeks to that loop.

Common questions

The three questions below decide whether a founder can actually start trading, and each turns on a rule rather than on a duration. Two of them ask what you are allowed to do while an authority is still processing something; the third asks whether an incomplete file resets anything. All three have published answers, and none of them is a day-count.

Can I invoice before the VAT number arrives?

A compliant invoice must carry the VAT identification number under which the supply was made — one of the mandatory mentions listed by the AED.

The room comes from the issuing deadline rather than the delivery date: for business-to-business supplies the invoice is due no later than the 15th day of the month following the month in which the goods were delivered or the service performed. Work can therefore be performed while the registration is processed, as long as the invoice itself goes out complete and in time.

Can I trade between the deed and RCS registration?

Not with fully compliant paperwork. For a Sàrl, the company's documents must state the company name, the words 'société à responsabilité limitée', the registered office, the RCS registration number and the capacity of the signatory of the document (the share capital mention is no longer obligatory) — and the RCS number does not exist until registration.

The permit identifier must also appear on letters, emails, websites, price quotes, invoices and shop fronts of all sales outlets, plus the signs that must be installed at all construction sites, in the form of either the ministerial permit number or the two-dimensional barcode. Signing a letter of intent is one thing; invoicing and signage are another.

Does an incomplete file restart the permit clock?

What is published is narrower than the question assumes. The Ministry acknowledges a file within 15 days, and article 31 of the law of 2 September 2011 gives that window one adjustment rather than a fresh start: the deadline extends by 1 month where a foreign qualification has to be recognised.

The practical point holds either way: while a file waits for a document from you, nothing is being processed, and that wait is the part of the calendar you control.

Compressing your own timeline

None of this shortens a statutory period. What it changes is the order in which things start, and how many times a file has to come back before it is complete. The first step comes first because nothing in Luxembourg can speed it up; the rest are about making one description of your activity survive four separate readings by four separate authorities. Work through the list the week you decide, not the week you file.

1. Request foreign criminal-record extracts and the notarised declaration the day you decide, not the day you file — they are the only items with no Luxembourg lever at all.
2. Settle the address before the paperwork, against the domiciliation rule above; every later document references it.
3. Write one activity description and reuse it verbatim in the permit file, the statutes, the VAT registration and the bank onboarding. Each authority reads its own copy, and divergent wording is what sends a file back.
4. Prepare banking alongside the permit, and treat deferred paying-up as a scheduling tool rather than a reason to delay opening the account.
5. Diarise the short deadlines the day the deed is signed: RCS at 1 month from signature, VAT at 15 days, RBE at 1 month running from the triggering event rather than from incorporation, and CCSS at 8 days once an employee starts.

The statutory periods above are fixed and knowable. The variable that decides a Luxembourg timeline is how long your own documents take to arrive.