The Luxembourg Société Anonyme, usually shortened to SA, is a capital company with limited shareholder liability and a structured governance framework. It can suit a group subsidiary, a holding company or a project involving several investors. The legal form alone does not make a company eligible for a stock-market transaction. The issuer, the securities and the relevant market rules must still be assessed.
The practical starting point is clear. An SA requires at least EUR 30,000 of subscribed capital, must be incorporated by notarial deed and may have one shareholder. Its more formal governance distinguishes it from the SARL and from the more contract-driven SAS.
The SA in plain terms
The SA has legal personality and owns its assets separately from its shareholders. Shareholders are generally liable only up to their agreed contributions. Personal guarantees, conduct as a director and unlawful distributions remain separate sources of exposure.
The current Companies Law allows one or more shareholders, whether individuals or legal entities. The company may carry on an operating activity, hold participations for its own account or combine both, subject to its corporate object and any activity-specific authorisation.
Share capital and contributions
The minimum subscribed capital is EUR 30,000. At least 25% of each cash subscription must be paid at incorporation. An SA formed entirely with cash at the minimum therefore starts with at least EUR 7,500 paid in, while the unpaid balance remains callable under the articles and the relevant corporate decisions.
Contributions in kind are possible. They require a report from an approved statutory auditor describing the assets and the valuation method. The capital minimum does not replace a financing analysis. The company still needs resources proportionate to its activity and obligations.
Shares and transfers
An SA may issue registered, bearer or dematerialised shares within the statutory conditions. Shares that are not fully paid remain registered. Bearer shares must be deposited with an authorised depositary.
Shares are transferable in principle, but the articles may introduce approval rights, pre-emption rights or other transfer restrictions. That flexibility is useful when new investors may enter later. It also explains why the SA is often compared with the SARL, whose transfers to third parties follow a more restrictive statutory regime.
Governance choices
The SA offers two governance models. The one-tier model uses a board of directors. The two-tier model separates a management board from a supervisory board. A single-shareholder SA may appoint one director; an SA with several shareholders normally appoints at least three directors in the one-tier model.
| Point | One-tier SA | Two-tier SA |
|---|---|---|
| Main management body | Board of directors | Management board |
| Separate supervision | No mandatory separate board | Supervisory board |
| Common use | Group companies and standard corporate structures | Structures seeking a formal split between management and supervision |
Daily management may be delegated within the limits set by law and the articles. The board or management board retains responsibility for matters that have not been validly delegated.
Shareholder decisions
Shareholders approve the annual accounts, decide how results are allocated and appoint the relevant corporate bodies. Amendments to the articles, including changes to capital, corporate purpose or legal form, normally require an extraordinary general meeting before a notary.
The annual general meeting approves the accounts within six months after the financial year end. Written and remote decision processes may be available where the law and articles permit them, but the minutes must still show the decision taken, the participants and the applicable voting result.
Audit and annual accounts
An SA that remains below the statutory audit perimeter generally has one or more commissaires aux comptes. An approved statutory auditor becomes required when the company exceeds two of the following three limits for two consecutive financial years under the current Accounting Law.
| Criterion | Current limit |
|---|---|
| Balance-sheet total | EUR 7,500,000 |
| Net turnover | EUR 15,000,000 |
| Average full-time employees | 50 |
The approved accounts are filed with the RCS within one month after approval and no later than seven months after year end. The official filing guidance explains the publication sequence. Bookkeeping, tax returns and beneficial-owner information follow their own calendars.
Comparison with the SARL and SAS
| Point | SA | SARL | SAS |
|---|---|---|---|
| Minimum capital | EUR 30,000 | EUR 12,000 | EUR 30,000 |
| Cash subscription paid at formation | 25% of each cash subscription | Depends on the current SARL payment rules and articles | 25% of each cash subscription |
| Minimum shareholders | 1 | 1 | 1 |
| Governance | One-tier or two-tier model | One or more managers | Mandatory president and rules set mainly by the articles |
| Transfers | Generally transferable, subject to restrictions | Statutory approval framework for third-party transfers | Mainly governed by the articles |
The choice should follow the intended decision process, investor entry and exit, financing and control rights. Capital alone rarely decides the form.
Tax and recurring administration
An SA is fully taxable. The corporate income tax rate is 14% up to EUR 175,000 of taxable income and 16% above EUR 200,000, with an intermediate formula between those amounts. The employment-fund surcharge and municipal business tax are added. The official corporate tax table provides the current rates.
An SA used to hold participations may qualify for the participation exemption if each condition is met. That outcome comes from tax law, not from the SA form or the SOPARFI label. Ongoing administration also includes accounting, annual corporate approvals, RCS filings and, where relevant, VAT and payroll.
Conclusion
The Luxembourg SA combines limited liability, transferable shares and a formal governance structure. Its EUR 30,000 capital, notarial formation and annual corporate cycle are predictable. The decisive question is whether its governance and investor framework fit the project better than the simpler SARL or the more flexible SAS.
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Frequently Asked Questions
Can a single shareholder form a Luxembourg SA?
Yes. One shareholder is sufficient. A single-shareholder SA may also have a sole director, while an SA with several shareholders normally has at least three directors under the one-tier model.
How much capital does an SA require?
The subscribed capital must be at least EUR 30,000. At least one quarter of each cash subscription must be paid at incorporation. An SA formed entirely with cash at the statutory minimum therefore pays in at least EUR 7,500.
What is the main difference between an SA and a SAS?
The SA follows a more prescribed one-tier or two-tier governance framework. The SAS leaves more of its internal governance to the articles of association, around a mandatory president. Both require at least EUR 30,000 of subscribed capital.
Must an SA director live in Luxembourg?
Company law does not impose a general Luxembourg residence condition on directors. The place of effective management and the substance of the company depend on where decisions are actually prepared, taken and documented.
When are SA annual accounts filed?
The shareholders normally approve the accounts within six months after the financial year end. The approved accounts are filed with the RCS within one month after approval and no later than seven months after the year end.
