The S.à r.l. (société à responsabilité limitée) is the most widely used company form in Luxembourg, representing roughly two-thirds of all incorporations. Its popularity stems from a straightforward combination: limited liability for shareholders, flexible governance rules, and a regulatory framework that scales from single-founder start-ups to multi-entity international groups.

For entrepreneurs and SMEs, the SARL offers a clear advantage over partnerships or sole-trader structures. Shareholders are liable only up to their paid-in capital, the administrative burden is lighter than that of a société anonyme (SA), and there is no requirement for publicly disclosed financial governance beyond statutory filings. International groups, meanwhile, regularly use the SARL as a vehicle for subsidiaries, joint ventures, or holding structures.

Since 2016, Luxembourg also offers the SARL-S (simplified SARL), which lowers the capital threshold to as little as EUR 1 — making it one of the most accessible entry points for business formation in the EU. Both variants share the same underlying legal framework, but each targets a different stage of entrepreneurial ambition.

This guide covers the full formation process for both the classic SARL and the SARL-S: capital requirements, the step-by-step incorporation procedure, governance rules, taxation, and practical tips drawn from our experience as company formation advisors in Luxembourg.

1. Why choose the SARL

The SARL remains the default choice for most Luxembourg incorporations for three structural reasons.

Limited liability. Shareholders’ exposure is capped at their capital contribution. Personal assets are protected, which encourages investment and simplifies risk management for founders and corporate shareholders alike.

Flexible governance. A single manager — natural or legal person, resident or not — can run the company. There is no mandatory board, no statutory auditor requirement below certain thresholds, and the articles of association can be tailored to suit the shareholders’ agreement.

Recognised internationally. The SARL is a well-understood corporate vehicle across Europe and beyond. Banks, counterparties, and regulators treat it as the standard Luxembourg private company, which simplifies cross-border transactions and financing.

Public offers of shares are prohibited for S.à r.l. entities, though public bond issues remain possible. If your project requires listed equity capital, the société anonyme (SA) is the appropriate form.

2. SARL vs SARL-S comparison

The choice between the two variants depends on your project scope, starting capital, and the type of shareholders involved. The SARL-S is a simplified version designed for small-scale commercial projects led by natural persons.

Criterion	Classic SARL	SARL-S (Simplified)
Share capital	EUR 12,000 minimum, fully subscribed and paid at incorporation	EUR 1–11,999, fully paid at incorporation
Shareholders	1–100, natural or legal persons	1–100, natural persons only; one SARL-S per person (inheritance excepted)
Authorised activities	All activities (commercial, civil, financial, holding)	Limited to commercial, craft, industrial and certain liberal activities
Incorporation	Notarial deed required	Private deed possible (no notary)
Manager	Natural or legal person, partner or not, resident or not	Must be a natural person
Share transfer	Approval by holders of ≥ 75% of shares (reducible to 50% by articles)	Same rule
Legal reserve	5% of net profit until reserve reaches 10% of capital	Special reserve: 5% of net profit per year until EUR 12,000 is reached

Our recommendation: if your project requires initial investment (equipment, stock, premises) and immediate credibility with banks and institutional counterparties, the classic EUR 12,000 SARL is the stronger foundation. The SARL-S is best suited for service-oriented micro-businesses where capital requirements are genuinely minimal.

3. Step-by-step formation process

The table below summarises the typical timeline. The overall duration depends primarily on the bank’s compliance review for the in-formation account.

Step	Action	Typical duration
3.1	Name clearance with RCS	1–3 days
3.2	Business permit application (MyGuichet)	2–6 weeks
3.3	Bank account in formation + blocking certificate	2–4 weeks
3.4	Notarial deed (classic) or private deed (SARL-S)	1–2 days
3.5	RCS / RESA / RBE filing + VAT registration	1–2 weeks

3.1 Name clearance

Submit the proposed company name to the Registre de Commerce et des Sociétés (RCS) for availability check. The name must be distinctive and not already registered. Prepare one or two alternatives in case the first choice is declined.

3.2 Business permit (autorisation d’établissement)

A business permit is required for commercial, craft, and certain liberal activities. Applications are filed electronically via MyGuichet and typically reviewed by the Ministère de l’Économie. The permit is not required for a pure holding company (SOPARFI) that performs no commercial activity.

The business permit can be finalised before or after RCS registration. In practice, many founders file the company first and obtain the permit shortly thereafter, but commercial activities cannot begin until the permit is issued.

3.3 Bank account and blocking certificate

Open a bank account in the company’s name in formation (en formation). Deposit the share capital — EUR 12,000 for a classic SARL — and obtain a blocking certificate (attestation de blocage) from the bank. This certificate is required by the notary before the deed can be passed. For an SARL-S, no blocking certificate is needed, but capital must still be fully paid.

3.4 Incorporation deed

A classic SARL must be incorporated by notarial deed before a Luxembourg notary. The deed includes the articles of association, capital structure, registered office, corporate purpose, manager appointments, and financial year. An SARL-S may be formed by private deed, which reduces costs but demands careful drafting to ensure statutory compliance.

3.5 Registrations: RCS, RESA, RBE, and VAT

After the deed is signed, the notary (or the founders, for an SARL-S) files for registration with the RCS, publication in the RESA (Recueil Électronique des Sociétés et Associations), and beneficial ownership registration with the RBE — all within one month. The notary also issues a release certificate so the bank unblocks funds. Finally, register for VAT with the Administration de l’Enregistrement et des Domaines (AED) where applicable.

4. Capital requirements and contributions

The classic SARL requires a minimum share capital of EUR 12,000, fully subscribed and paid at incorporation. Capital may consist of:

• Cash contributions — deposited in the in-formation bank account and evidenced by the blocking certificate.
• In-kind contributions — assets such as equipment, intellectual property, or real estate, valued in the articles of association. No independent auditor valuation is required unless the articles provide otherwise.
• Industry contributions — permitted since 2016 (contributions in services or know-how). These are neither capitalisable nor transferable and do not count toward the minimum capital threshold.

For the SARL-S, capital ranges from EUR 1 to EUR 11,999 and must be fully paid at incorporation. A special statutory reserve of 5% of annual net profit must be set aside each year until the reserve, combined with capital, reaches EUR 12,000 — at which point the company must convert into a classic SARL.

5. Governance and share transfers

An SARL is managed by one or more managers (gérants), who may be natural or legal persons, shareholders or third parties, residents or non-residents. Day-to-day decisions rest with the manager(s); major decisions (amendment of articles, capital changes, dissolution) require shareholder approval.

Shares are registered and recorded in a shareholder register maintained at the registered office. They are not freely transferable to third parties: a transfer to a non-shareholder requires prior approval by holders of at least 75% of shares. The articles of association may reduce this threshold to 50%, but not below.

Transfers between existing shareholders, or between spouses and direct-line relatives, are typically free unless the articles impose additional restrictions. Always review the articles before assuming transferability.

6. Taxation overview

Luxembourg applies a transparent and competitive tax regime to SARLs. The key rates for tax year 2025 are summarised below.

Tax	Rate	Notes
Corporate income tax (CIT)	14% on taxable income ≤ EUR 175,000; 16% above EUR 200,000	Sliding scale applies between EUR 175,000 and EUR 200,000
Solidarity surtax	7% of CIT liability	Applied on top of CIT
Municipal business tax (MBT)	6.75% in Luxembourg-City	Varies by municipality
Combined rate (Luxembourg-City)	~23.87%	CIT + surtax + MBT
Net wealth tax	0.5% on net assets ≤ EUR 500 million; reduced rates possible	Minimum NWT of EUR 4,815 for holding companies
VAT (standard rate)	16%	Reduced rates of 13%, 7%, and 3% for specific goods and services

For holding structures, the participation exemption regime can exempt qualifying dividends and capital gains from CIT and MBT, making the SARL an efficient vehicle for group structuring.

7. Practical tips

Start with the bank. The bank account in formation is the critical-path item. Approach your bank early, provide complete KYC documentation upfront, and factor two to four weeks into your timeline.

Draft articles carefully. Even for an SARL-S formed by private deed, invest in professional drafting of the articles of association. Errors in corporate purpose, capital structure, or transfer clauses create costly problems at a later stage.

Coordinate the business permit. If your activity requires a permit, begin the application in parallel with the bank account opening. The two processes can run concurrently, saving several weeks.

Plan your accounting from day one. Luxembourg SARLs must file annual accounts with the RCS. Engage an accounting firm before incorporation to ensure your chart of accounts, financial year, and reporting obligations are properly set up.

Consider the long-term structure. If you anticipate needing a SOPARFI holding or multiple entities, plan the group architecture before incorporating individual vehicles. Restructuring after incorporation is possible but involves additional costs and formalities.