A private LuxTrust App, listed from €50 (€115 recorded in July 2026) for 3 years, is all a Luxembourg founder needs. A professional SmartCard from €160, plus reader and middleware, buys nothing a founder uses.
Once the company is trading, the same App signs the recurring work of preparing and filing the corporate tax return and the other eCDF and MyGuichet filings.
See what monthly accounting includes, from €250The private product is accepted where it matters. For the business eSpace, Guichet.lu accepts a private or professional LuxTrust product, a Luxembourg electronic identity card, or an eIDAS device from another European country. The tax administration (ACD) states that a LuxTrust product (private or pro) is required both to use MyGuichet and to sign the return.
The App is badged active within 48 hours, but that clock starts after identification, so book the identity check first. Opening the business eSpace then also needs the company's 13-digit matricule.
Which LuxTrust product do I need, and what does it cost?
LuxTrust sells a private range, which is software on a phone, and a professional range, which is hardware. These prices were read off LuxTrust's own ordering pages on 7 August 2026: the individual catalogue, the App page and the professional catalogue.
| Product | Listed price | Validity | In practice |
|---|---|---|---|
| LuxTrust App (private) | from €50 | 3 years | Software on your phone, badged active within 48 hours |
| Scan (professional) | from €130 | 3 years | A physical device, with a delivery step before first use |
| SmartCard (professional) | from €160 | 3 years | Card reader and LuxTrust Middleware bought separately |
| SmartCard, collected in person | €320 | 3 years | Picked up at LuxTrust's offices instead of delivered |
The App card is headed à partir de. A July 2026 pass over the same order flow recorded €115 for the App on the same 3-year term. Budget that figure, not the floor.
Founders often assume a professional product is needed for the company. It is not: the private App covers both the business eSpace and the signature on the corporate return.
How long does LuxTrust take?
The App itself is badged active within 48 hours. The real lead time is identification, because LuxTrust requires a compulsory legal identity check before the digital identity is issued, done either in person at LuxTrust, at a partner or at a notary, or online by video. An appointment at LuxTrust, a partner or a notary depends on someone else's diary. The video route is the only one whose date you control, so pick it when a deadline is already visible.
Already trading
Photograph the invoice. Send it in. Everything else is handled
Bookkeeping, VAT returns and annual accounts by a licensed Luxembourg firm, from €250 a month. You keep access to your own records.
See how it worksLuxTrust also notes that identification at a notary may carry additional costs borne by the applicant, and none of that appears in the product price. The activation badge sits on the App card only, while the Scan and SmartCard add a delivery step of their own.
Can I get LuxTrust without being in Luxembourg?
A founder outside Luxembourg can use the video route without travelling. For the business eSpace, a national eID from another European country may be enough, because Guichet.lu lists eIDAS devices among the accepted credentials. The ACD still names a LuxTrust product for signing the corporate return, so plan on holding one anyway.
What is the MyGuichet business eSpace, and who can open it?
MyGuichet.lu has three kinds of space. Your personal space opens with your own certificate and runs your procedures as an individual. The business eSpace is a separate space for the company, open to legal persons, the self-employed and associations.
Creating it needs the company's 13-digit matricule and an accepted credential. Guichet.lu's business eSpace help page, last updated in January 2026, sets out both prerequisites.
The business eSpace is collaborative — the administrator can invite other people to join the eSpace and handle procedures inside it. That is the reason never to share a certificate. Delegation is built in, and a shared certificate puts one person's legal signature in somebody else's hands.
The third kind is the certified business eSpace, because some sector services, such as food safety and social elections, are reachable only through a certified business eSpace. Check whether your sector is affected before the procedure is in front of you. Filed procedures show their status inside the space, so "did that go through?" is answered by logging in rather than by phoning.
What do the RCS, RBE and other registrations need?
Luxembourg Business Registers (LBR) runs the trade register (RCS) and the beneficial-owner register (RBE) on its own portal, beside MyGuichet. At the RCS, filings are made electronically. The RBE declaration is made online using a LuxTrust product, a Luxembourg eID card, or an eIDAS electronic certificate offering at least a substantial level of security.
| Obligation | Deadline | Official fee | Note |
|---|---|---|---|
| Deposit the articles at the RCS | within 1 month of signature | €10–106, by legal form | the RCS tariffs set by grand-ducal regulation are stated exclusive of VAT and are subject to VAT at 17% |
| Declare beneficial owners to the RBE | 1 month | €15 excluding VAT | LBR has 3 working days to register it |
| Register for VAT | 15 days | — | Taxable persons not exempt from registration |
| Register as an employer with the CCSS | 8 days | — | This obtains the matricule-employeur |
| Declare each new employee to the CCSS | 8 days | — | Same deadline for resident and non-resident staff |
| Declare a vacant post to ADEM | before the job offer is published | — | every employer wishing to hire staff must declare the vacant post to ADEM |
| Apply for the business permit | acknowledged within 15 days, decided within 3 months | €50 | the absence of a ministerial reply before the end of the 3-month period counts as a tacit authorisation |
| File the corporate return (modèle 500) | 31 December of the year following the tax year | — | MyGuichet only, signed with a LuxTrust product |
A late RCS deposit holds up the permit too, because the articles of association must be registered with the Trade and Companies Register before the permit is definitively granted. The recurring dates after registration sit in the company compliance calendar.
When does the RBE month start, and in which language?
The RBE deadline has a trigger founders misread: the month runs from the moment the entity became aware, or should have become aware, of the event making the entry or its amendment necessary — not from the date of the event itself.
The RBE form accepts French, German or Luxembourgish only — English is not accepted on the RBE declaration form. An English-speaking founder who did every other step in English hits that wall on the last one.
Who signs the corporate tax return?
Filing the corporate return electronically is mandatory via MyGuichet.lu since tax year 2017 for resident capital companies, including the s.à r.l. and the s.à r.l.-S. It is a single return (modèle 500) covering corporate income tax, municipal business tax and net wealth tax, due by 31 December of the year following the tax year. Filing late carries a supplement of up to 10% of the tax assessed.
The ACD's electronic exchanges page ties the two together: the certificate that gets you into the portal is also what signs the return.
So a manager whose certificate has lapsed does not have a login problem. They have an unsigned return.
Products in both LuxTrust ranges run 3 years, so the expiry date is known on the day the product is issued. Whoever handles preparing and filing the corporate tax return needs a certificate that is still valid on the day it is signed.
The order to do this in
Five steps, in the order the dependencies run.
- Book the identity check first, by video if a deadline is close.
- Order the private App, listed from €50 (€115 recorded in July 2026) for 3 years, unless a tool in your sector demands hardware.
- Open your personal MyGuichet space as soon as the certificate is active.
- Create the business eSpace once the company holds its 13-digit matricule. Invite the people who file for you rather than passing the certificate around.
- Put the expiry date in the calendar the day the product is issued, 3 years out, next to the return deadline of 31 December of the year following the tax year.