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SASU vs SAS vs SARL: Which Legal Structure Should You Choose in 2026?

Deux hommes discutant du futur statut de leur entreprise, SASU, SAS ou Sarl.
Preparing to choose the company's legal structure: SAS, SASU, or SARL.

SASU vs SAS vs SARL: Which Legal Structure Should You Choose in 2026?

Why this choice is so decisive in 2026

The choice of legal form "SASU vs SAS vs SARL" — is one of the few founding decisions that commits a business over the long term. It shapes the director's social protection, the level of their contributions, the taxation of profits, the way units or shares are transferred and the ability to bring in new partners.

A mistake at this stage cannot be undone without cost: converting a SARL into a SAS requires a shareholder resolution, sometimes a report from a transformation auditor and always time lost at the worst possible moment.

In France, the SAS and the SASU now account for the vast majority of new commercial company formations, according to INSEE data — a gradual shift explained by their flexibility and by the dividend regime. The SARL nonetheless retains a solid place, particularly for family ventures and activities where stability matters more than fundraising.

This guide compares the three forms on the criteria that truly matter without oversimplifying. The aim is not to crown a single "best" structure in absolute terms there is no such thing — but to give you the keys to identify the one that fits your actual project.

The 30-second version:

The SARL suits family ventures and stable SMEs: its framework is set by law, and its majority manager falls under the self-employed worker regime (TNS), with lighter contributions. The SAS is the form of choice for start-ups and businesses aiming to raise funds: maximum freedom in drafting the articles of association, a chairman treated as an employee for social-security purposes, flexible share transfers and dividends exempt from social contributions. The SASU is simply a single-shareholder SAS: it gives the solo founder the flexibility of the SAS, where the EURL (single-member SARL) stays on the TNS model. Taxation in 2026: all three forms are subject to corporate income tax (IS) by default at 25%, with a reduced rate of 15% on the first €42,500 of profit for eligible SMEs. The real divide isn't about the structure's name but about two trade-offs: the director's social-security regime (self-employed/TNS vs employee-equivalent) and the ability to bring investors into the share capital.

SARL: the reference form for SMEs and family ventures

The société à responsabilité limitée (limited liability company) is governed by articles L223-1 et seq. of the Commercial Code. It brings together 2 to 100 partners; in its single-member version, it takes the name EURL (single-member limited liability company). Partners' liability is, barring management misconduct, limited to their contributions.

Share capital

There is no minimum capital: one euro is legally sufficient, even if a credible capital figure remains preferable in the eyes of banks and suppliers. For cash contributions, one fifth (20%) must be paid up on incorporation with the balance within five years.

The manager's social-security regime: the decisive point

This is where the SARL stands apart. The majority manager — the one who holds, alone or together with their household and co-managers, more than half of the units falls under the self-employed worker status (TNS), affiliated with the self-employed social security scheme.

Their contributions are markedly lower than those of an employee-equivalent director, in exchange for lighter social protection and no entitlement to unemployment benefits. Conversely, a minority or equal-holding manager is treated as an employee and falls under the general scheme.

Taxation

The SARL is subject to corporate income tax (IS) by default. An option for personal income tax (IR) is possible, either permanently for a family SARL or temporarily (up to five financial years) for a SARL under five years old that meets the legal conditions.

Dividends

For a majority TNS manager, the portion of dividends exceeding 10% of the share capital (increased by share premiums and current-account balances) is subject to social contributions. This mechanism limits the appeal of the salary/dividend trade-off, unlike the SAS.

Transferability

Units (parts sociales) are transferred by written deed, subject to registration. A transfer to an outside third party requires, in principle, the partners' approval; transfers between partners, spouses, ascendants or descendants are unrestricted, unless the articles provide otherwise. This rigidity protects the family balance but complicates an investor's entry.

Worth remembering : the SARL is built for stable, family or wealth-oriented ventures, where optimising the director's contributions matters more than capital flexibility.

SAS: the form of choice for start-ups and investors

The société par actions simplifiée (simplified joint-stock company) is governed by articles L227-1 et seq. of the Commercial Code. It requires at least two partners (one for the SASU, see below) and imposes no ceiling. Its reputation comes down to a single word: contractual freedom in the articles of association.

Bespoke governance

Where the SARL imposes a detailed legal framework, the SAS lets the partners organise the company's operation themselves in the articles: the composition and powers of the management bodies, decision-making procedures, approval, pre-emption or inalienability clauses. This flexibility is precisely what investors are looking for, since it lets them insert their usual protections.

The chairman's social-security regime

The chairman of a SAS is treated as an employee for social-security purposes: they fall under the general scheme and enjoy extensive social protection (excluding unemployment insurance, from which corporate officers are barred). In exchange, their contributions represent a significantly higher burden than that of a majority TNS manager, for an equivalent net salary.

The TNS / employee-equivalent trade-off is worth several thousand euros a year. On CryviTis, a verified accountant simulates each scenario before you decide. → Find a professional

The dividend lever

This is the SAS's most decisive advantage. Dividends paid to the chairman are not subject to social contributions: they fall under the 30% flat tax (PFU, prélèvement forfaitaire unique). This difference in treatment compared with the SARL largely explains why so many directors now favour the SAS.

Capital and taxation

Like the SARL, the SAS requires no minimum capital, but half (50%) of cash contributions must be paid up on incorporation. The default tax regime is corporate income tax (IS) with the same temporary five-year IR option, subject to conditions.

Compatibility with fundraising

The SAS issues shares (actions), not units (parts sociales). It allows you to structure a clear capitalisation table, to issue preferred shares, BSPCE (founder/employee share warrants) for staff, or BSA (share subscription warrants) for investors. Share transfers are unrestricted by default, formalised by a simple transfer form (ordre de mouvement) and their registration duties (0.1%) are far lower than those on SARL units.

Worth remembering: if your project aims at fundraising, bringing in partners, or an evolving capital split, the SAS is almost always the answer.

SASU : the solo founder's SAS

The SASU is not a distinct form: it's a single-shareholder SAS. It follows the same rules as the SAS, with lighter administration thanks to the absence of shareholder meetings (the sole shareholder's decisions are simply recorded).

For the solo founder, then, the trade-off is less between "SASU and SAS" than between SASU and EURL. Since the EURL is a single-member SARL, its sole-shareholder manager falls under the TNS regime and the company is, by default, subject to personal income tax (IR) (with an IS option available). The SASU, for its part, places its sole-shareholder chairman under the employee-equivalent regime and the company under corporate income tax (IS) by default.

The right instinct: the SASU favours social protection and dividend flexibility at the price of higher contributions on salary; the EURL optimises the director's contributions and suits capital-light activities better. A solopreneur anticipating growth, the arrival of partners or a future fundraising has every interest in starting out as a SASU, which converts into a SAS without any change of form.

On CryviTis, find a verified advisor specialised in company formation, and get support tailored to your project. → Find a professional

Comparative summary table

Criterion

SARL

SAS

SASU

Partners

2 to 100 (1 = EURL)

2 minimum

1

Minimum capital

€1 (20% paid up)

€1 (50% paid up)

€1 (50% paid up)

Director

Manager (natural person)

Chairman

Sole-shareholder chairman

Social-security regime

TNS if majority; employee-equivalent if minority/equal

Employee-equivalent

Employee-equivalent

Default taxation

IS (IR option available)

IS (5-year IR option)

IS (5-year IR option)

Contributions on dividends

Yes, above 10% of capital (TNS manager)

No (30% flat tax)

No (30% flat tax)

Transferability

Units, approval required, 3% duties

Shares, unrestricted by default, 0.1% duties

Shares, unrestricted by default

Fundraising

Poorly suited

Ideal (shares, BSPCE, preferred shares)

Ideal once capital is opened up

Formalities

Set legal framework

Strong contractual freedom

Contractual freedom, lighter administration

IS rate in 2026: 25% standard; 15% on the first €42,500 of profit for SMEs whose turnover is below €10M, with fully paid-up capital held at least 75% by natural persons.

On CryviTis, find a verified accountant or advisor specialised in company formation, and get support tailored to your project. → Find a professional

How to choose between SASU vs SAS vs SARL: 5 questions to ask yourself

  1. Will you be on your own or with others? On your own, the trade-off is between SASU and EURL. With others, between SAS and SARL.

  2. Are you considering a fundraising or the entry of partners? If so, the SAS/SASU is the way to go: investors think in shares and require bespoke clauses in the articles.

  3. What matters more to you: lighter contributions or extensive social protection? The majority SARL manager (TNS) pays less; the SAS chairman (employee-equivalent) is better covered.

  4. Do you intend to pay yourself mainly in dividends? The absence of social contributions on SAS/SASU dividends is a decisive advantage over the SARL.

  5. Is your project a family or wealth-oriented one? The SARL and its approval regime better protect the stability of the shareholding; the family SARL also allows the permanent IR option.

Worth remembering: none of these questions can be settled in isolation. It's their combination that shapes the most suitable form — a trade-off an accountant refines according to your target salary level, your personal taxation and your development horizon.

Q&A

What is the main difference between a SAS and a SARL? The SAS offers great contractual freedom in its articles and places its chairman under the employee-equivalent regime, with dividends exempt from social contributions. The SARL follows a more tightly defined legal framework and lets its majority manager fall under the TNS regime with lower contributions.

Is the SASU more advantageous than the EURL? It depends on your priorities. The SASU offers better social protection and dividend flexibility, but higher contributions on salary. The EURL optimises the TNS director's contributions. For a project aiming at growth or a future fundraising, the SASU is generally preferred.

Which structure should you choose to raise funds? The SAS (or a SASU set to open up its capital) is the suitable form: it issues shares, allows preferred shares and BSPCE and offers the contractual flexibility investors expect.

What is the tax rate for these companies in 2026? All three forms are subject to corporate income tax (IS) by default, at the standard rate of 25%, with a reduced rate of 15% on the first €42,500 of profit for eligible SMEs.

Do you need a statutory auditor? The appointment becomes mandatory when the company exceeds two of the following three thresholds: €10M turnover, €5M total balance sheet, 50 employees (thresholds from decree No. 2024-152, unchanged in 2026). Lower thresholds apply to significant subsidiaries.

Going further

Choosing a legal form is only one step in setting up a business. To place this decision within a complete process, see our complete guide to company formation in France, Belgium, Switzerland and the UAE and find all our resources to start a business & business management category.

The cost of support varies from one form to another: a SAS generally calls for more demanding accounting follow-up than a SARL. Our article on the cost of an accountant in 2026 details these differences. Finally, to anticipate audit obligations as you grow, see our dossier on accounting audit.

Still unsure which form to choose?

Comparing SASU, SAS and SARL on paper is no substitute for the opinion of a professional who knows your situation. On CryviTis, find a verified accountant or advisor specialised in company formation and get support tailored to your project. → Find a professional

Are you an accountant, advisor or business lawyer? Join CryviTis to grow your practice among founders and directors looking for support with company formation. → Become a partner professional

Sources and official references

Legal forms:

Taxation (corporate income tax 2026):

Thresholds for appointing a statutory auditor:

Director's social-security regime:

Registration:

Market data:

The blog's content is purely informational and in no way constitutes personalised accounting, tax, legal or audit advice. CryviTis acts as a neutral technical intermediary within the meaning of Article 3 of Regulation (EU) 2022/2065 (DSA) and does not provide any regulated service. For any engagement, consult a professional registered with the competent authority in your jurisdiction.

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