SARL vs SA in Luxembourg: Which legal form to choose?

SARL vs SA: the quick answer

If your project brings together 1 to 5 shareholders, does not raise external funds in the short term and targets turnover below €2M, the SARL is almost always the right choice: capital €12,000 (100% paid up), governance by a single manager possible, moderate incorporation fees (€2,000 to €3,500). If you plan a Series A round, the entry of institutional investors, a regulated activity (banking, insurance, funds) or a listing, the SA is required: capital €30,000 (25% paid up is enough for incorporation), board of directors, freely transferable shares. The SA also makes BSPCE/stock options and standardised investor agreements easier.

Detailed SARL vs SA comparison table for 2026

Share capital: €12,000 vs €30,000, what are the real consequences?

The SARL requires a minimum capital of €12,000 fully paid up at the time of incorporation. This amount is blocked in a bank account until RCS registration is obtained, then becomes available for business needs (operating expenses, investments). The SA requires a higher capital of €30,000, but only a quarter needs to be actually paid up at incorporation, i.e. €7,500. The remaining €22,500 can be called by the board of directors within a maximum period of 5 years. In practice, this deferred payment allows an SA to start with treasury comparable to that of a SARL, while displaying higher capitalisation that reassures banking partners and investors.

For highly capitalised projects (more than €500,000 raised), the SA also allows the issuance of shares with a reduced nominal value (for example €0.01), which simplifies the structuring of successive financing rounds. Our teams regularly see SARLs converted into SAs during a €1 to €2M round precisely for this reason. To explore the capital question further, see our dedicated guide: Capital minimum d'une SARL au Luxembourg : Guide 2026.

Governance and decision-making

The SARL is run by one or more managers, whether shareholders or not, appointed in the articles of association or by decision of shareholders representing more than half the capital. The sole manager of a SARL often combines executive and representative functions, which suits an entrepreneur-founder perfectly. Ordinary decisions are taken by simple majority in ordinary general meeting; amendments to the articles require three-quarters of the capital.

The SA requires more structured governance. Two systems coexist: the one-tier model (board of directors of at least 3 members, except in a single-member SA where a sole director is enough) and the two-tier model (executive board + supervisory board). Directors are appointed for a maximum of 6 years and subject to broader civil and criminal liability than a SARL manager. For a solo founder, the one-tier model with a single director is today very close in simplicity to a SARL, while keeping future flexibility to integrate a board.

Transfer of securities: the real tipping point

In a SARL, any transfer of shares to a non-shareholder third party requires prior approval of shareholders representing at least 75% of the capital (art. 189 of the amended law of August 10, 1915 on commercial companies). This rule protects shareholding stability but becomes an obstacle as soon as one wishes to welcome investors, buy back shares from an outgoing shareholder or set up an incentive plan. Statutory waivers are possible but rarely total.

In an SA, shares are by default freely transferable, which facilitates M&A transactions, investor entries/exits and loyalty instruments (stock options, free shares, BSPCE). The articles may introduce approval or pre-emption clauses, but these remain negotiable and modifiable by decision of the EGM. This flexibility explains why almost all Luxembourg startups that have raised more than €1M were either born as an SA, or converted into an SA at the time of the round.

Taxation: nearly identical, but a few subtleties

On the corporate tax side, SARL and SA are treated strictly identically. In 2026, a company established in Luxembourg city bears an overall effective rate of approximately 24.94%, composed of the IRC (16.72% including the employment fund contribution), the ICC at the Luxembourg city municipal rate (6.75%) and the minimum wealth tax (IF). For details of rates and optimisation techniques, see Taux d'imposition des sociétés au Luxembourg en 2026.

Both forms are eligible for the same preferential tax regimes: parent-subsidiary regime (exemption of dividends received from qualifying subsidiaries), exemption of capital gains on participations, IP Box regime for innovation, double taxation treaty with more than 85 countries. The SA has a slight advantage for non-resident shareholders: dividends from unlisted SAs may, under certain conditions, escape the 15% withholding tax via a tax treaty, while the distribution of SARL shares is subject to the same withholding but with fewer recovery options.

Accounting and reporting obligations

SARL and SA must both file their annual accounts with the RCS via the eCDF platform within 7 months following the closing, in XBRL format. Size criteria (balance sheet below €4.4M, turnover below €8.8M, headcount below 50 employees) allow both a SARL and an SA to file in abridged layout, which significantly reduces the administrative burden.

The main difference concerns the mandatory appointment of an approved réviseur d'entreprises. In an SA, as soon as two of the three SME thresholds are exceeded (balance sheet €4.4M, turnover €8.8M, 50 employees), an annual statutory audit is mandatory. In a SARL, this threshold can be pushed back thanks to certain exemptions, notably when the number of shareholders remains low and the activity is non-financial. The annual cost of a statutory audit in Luxembourg is typically between €8,000 and €25,000 for an SME, which can weigh significantly on an SA in a growth phase.

Practical cases: which form for which profile?

• Independent consultant or agency < 5 people, turnover < €500k: SARL (or even SARL-S if starting with low capital).
• Luxembourg e-commerce in growth, team of 5-15 people, no external investors: classic SARL.
• Tech startup preparing a Seed then Series A within 18 months: SA from incorporation to avoid costly conversion.
• Family wealth holding (holding SOPARFI): SARL is sufficient, governance controlled by the founder.
• CSSF regulated activity (PSF, banking, insurance, funds): SA mandatory by special text.
• Real estate project with several investors and raising > €2M: SA for shareholding structuring flexibility.
• Liberal profession firm (lawyers, accountants): SARL if the professional body allows it, otherwise SCS/SC.

Converting a SARL into an SA: when and how?

Converting a SARL into an SA is a relatively common operation, typically triggered by a significant fundraising round or the entry of institutional investors requiring transferable shares. The procedure goes through an extraordinary general meeting (EGM), a notarial deed, an independent expert report on the valuation of contributions, and a capital increase to reach the required €30,000. Expect 4 to 8 weeks of procedure and a total cost of €6,000 to €12,000 incl. VAT (notary, expert, publications, registration fees).

The advantage of starting directly as an SA when rapid growth is anticipated is obvious: you avoid these average €8,000 in fees and save on procedure time. On the other hand, if the project remains unclear or the round is not assured, starting as a SARL remains the most rational choice, with a future conversion if needed.

What to remember

The SARL remains the backbone of the Luxembourg entrepreneurial fabric: moderate capital, simple governance, competitive taxation, controlled operating costs. The SA takes over as soon as issues of capitalisation, formalised governance or free circulation of securities arise. In practice, the triggering criterion is almost always fundraising: if it is planned within 12 months for an amount exceeding €500,000, start as an SA. Otherwise, start as a SARL and convert if necessary. For a personalised diagnosis of your situation, especially if you are also hesitating with the SARL-S, see SARL-S vs SARL : Comparatif complet pour entrepreneurs and Comment créer une SARL au Luxembourg en 2026 : Guide complet.