Choosing the registered office (“siège social”) of a SAS (Société par Actions Simplifiée) is one of the most important steps when creating the company. More than a simple address, the registered office is the place where the company is legally anchored. It is both the decision-making center of the business and the reference point for many legal, tax, and judicial obligations. A badly chosen or fictitious registered office can have serious consequences, while a carefully planned one strengthens credibility and secures the company’s future.
Our legal team guides you through domiciliation options, compliance requirements, and strategic location planning to avoid legal risks and build a strong, credible corporate foundation.
1. What is the registered office of a SAS and why does it matter?
The registered office of a SAS is the place where the company’s effective management is carried out. In practice, this usually corresponds to the location where directors meet, where important decisions are taken, and where administrative services are based. It does not have to be the same place as the production site or the store where business activity is carried out. Case law has made this clear, for example in a Paris ruling (CA Paris, 17 October 1980).
Importantly, the registered office must be real and tangible. It cannot be fictitious. A mere post office box is not sufficient (CA Paris, 5 December 2007). For a company to be registered with the Trade and Companies Register (RCS), it must have the effective use of premises designated as its registered office.
2. Registration and legal publicity obligations
French law requires that the registered office be stated in the bylaws of the SAS (art. L.210-2 of the Commercial Code). It must also be indicated on all commercial documents, such as invoices, purchase orders, correspondence, and even on the company’s website (art. R.123-237 of the Commercial Code).
The registered office is not only a formal requirement: it has major consequences. It determines the nationality of the company, the law applicable to it, the competent court for any disputes, and the registry where official documents must be filed (such as minutes of meetings and annual accounts).
3. How can you domicile the registered office of your SAS?
One of the advantages of the SAS is that it gives founders freedom to choose where to set up the registered office, provided that local zoning and urban planning rules are respected. Several options exist, each with its own advantages and constraints.
a) Professional premises
The most common solution is to domicile the company in professional premises. These may be premises the company owns, rents, or sublets — offices, workshops, or warehouses, depending on the nature of the activity.
Another increasingly popular option is collective domiciliation. Several companies share the same space, often in incubators, coworking spaces, or business centers. This is fully legal, provided that a domiciliation contract is signed with the domiciliataire (the leaseholder or property owner). This contract must meet strict conditions:
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It must be in writing and valid for at least three months, renewable automatically.
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It must guarantee the company confidential access to space where corporate bodies can meet.
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It must allow for the storage and consultation of mandatory legal documents.
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It obliges the domiciled company to inform the domiciliataire of any change affecting its activity or legal form.
If these conditions are not respected, the domiciliataire risks a fine of up to €1,500 (art. R.123-169-1).
We help you choose legally compliant, strategically sound domiciliation solutions that protect your company, anticipate growth, and ensure full alignment with French commercial regulations.
b) The legal representative’s home address
The law also allows the president or another legal representative of the SAS to domicile the registered office at his or her private residence. Two scenarios must be distinguished:
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Permanent domiciliation: this is permitted if no law, lease clause, or co-ownership regulation prohibits it. The director must be able to provide proof of address, such as a utility bill in his name, as well as an agreement to make the premises available.
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Temporary domiciliation: if permanent domiciliation is prohibited (for example, by a lease contract), the law allows the use of the personal residence as the registered office for a maximum of five years. The legal representative must inform the landlord or co-ownership association in advance. After this period, the company must transfer its registered office elsewhere.
This solution is often used to create a SAS quickly and at low cost, without renting separate premises from the start. However, it requires careful planning for a future transfer.
4. What is a fictitious registered office and why is it risky?
A fictitious registered office is one that does not reflect the true place where management is exercised. In other words, it is not enough for the address to appear in the bylaws: it must also be the place where important decisions are actually taken.
French courts punish fictitious registered offices severely, particularly in cases of fraud or litigation. Third parties may sue either before the court of the statutory registered office or the real registered office (art. L.210-3, para. 2 of the Commercial Code). However, the company cannot use its statutory address as a defense if it is fictitious.
In insolvency proceedings (e.g., receivership or liquidation), only the court of the real registered office is competent.
A fictitious registered office can also expose directors personally. For example, the Court of Cassation ruled that a French director could be prosecuted for offenses committed by a foreign company if its real registered office was in France, even though the statutory office was abroad (Cass. crim., 31 January 2007).
Signs of fictitiousness include:
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the place where major contracts are signed,
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the place where accounting is kept,
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the location of corporate documents,
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the address of creditors and partners,
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or the site of the company’s main establishment.
Example: a company domiciled in Corsica, without real activity or staff there, had its registered office declared fictitious because its director actually lived in another region (Cass. com., 5 January 1999).
5. Practical advice for entrepreneurs
The choice of registered office is not a simple formality. It has lasting legal, tax, and strategic consequences. Here are three key tips when setting up your SAS:
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Plan for stability: avoid temporary solutions if the company is expected to grow quickly.
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Respect contracts and regulations: especially in cases of shared domiciliation or home-based registered offices.
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Check leases and zoning rules: a residential lease that prohibits professional use, for example, can make domiciliation illegal.
Lay the legal foundation for your SAS with confidence.From legal representative domiciliation to professional premises, we provide tailored advice to ensure your registered office is compliant, strategic, and supports long-term business stability.
Conclusion
The registered office of a SAS is much more than an address. It is the cornerstone of the company’s legal, tax, and judicial organization. Every SAS must have a real registered office, in compliance with the law, and corresponding to the place where management is truly exercised.
A poorly chosen or fictitious registered office can result in serious consequences: loss of credibility, litigation, sanctions, or insolvency proceedings before the wrong court. By contrast, a carefully chosen registered office strengthens the company’s structure, reassures partners, and secures long-term growth.
