SASU: advantages and disadvantages in 2026

The SASU — Société par Actions Simplifiée Unipersonnelle, or single-member simplified joint-stock company — consistently ranks among the most popular legal structures for solo founders in France. The appeal is genuine: flexible bylaws, general social security coverage for the president, dividends free of social contributions, and an easy pathway to bring in co-founders or investors later. What is less often said is that the SASU can be materially more expensive than its main alternative, the EURL (single-member limited liability company), if your only goal is to minimise payroll-related levies.

Before signing articles of association, the decision should rest on projected figures rather than reputation. A legal structure is not a badge; it is a framework that must match your activity level, remuneration strategy, and development horizon.

In short: the SASU is an excellent structure for founders who anticipate growth, capital-opening, or investor entry. It is less well-suited when the primary objective is to reduce social charges or test a low-margin idea at minimal operating cost. The SASU vs EURL trade-off is always a numbers exercise, never a gut-feel call.

Freely organised governance#

The SASU is a simplified joint-stock company with a single shareholder. Its defining strength is statutory freedom: you set the rules of operation, the powers of the president (managing director), the conditions for admitting a future partner, and the profit-distribution mechanisms yourself. No other single-person French structure offers comparable latitude from day one.

This flexibility becomes especially valuable if you plan to raise equity, bring in a co-founder, or restructure the share capital within two to three years. You avoid having to rebuild the entire legal architecture at the moment when activity starts to gain traction. For a detailed look at the SAS framework, see our SAS: definition and operation guide.

The president treated as an assimilated employee#

The SASU president is affiliated to the French general social security system (régime général) as an "assimilated employee" (assimilé salarié). In practice, this means the same health, maternity, disability-death, and basic pension coverage as an executive employee — with one notable exception: unemployment insurance (assurance chômage) does not apply to the corporate mandate.

This is a structural difference from the EURL manager, who falls under the TNS regime (Sécurité sociale des indépendants, the self-employed social security scheme). The general social security regime is more expensive in terms of contribution rates, but the coverage, particularly for retirement, is more comprehensive and easier to read.

No social contributions when no salary is paid#

A frequently overlooked feature: if the SASU president draws no salary, no social contributions are due. This matters in two scenarios: during an early phase when revenues are not yet stable, and when the founder maintains a salaried position alongside the company. By contrast, the TNS manager of an EURL must pay minimum social contributions even with zero earnings.

Dividends free of social contributions — the PFU at 31.4 %#

Dividends paid to the SASU president-sole shareholder are not subject to social contributions. They are taxed solely at the flat tax (prélèvement forfaitaire unique, PFU), set at 31.4 % from 1 January 2026 (12.8 % income tax + 18.6 % social levies, after the 1.4-point increase in social charges on capital income introduced by the 2026 Social Security Finance Law, LFSS 2026).

This is a structurally significant advantage over the majority manager of a SARL or EURL at corporate tax (IS): in those forms, the portion of dividends exceeding 10 % of share capital plus share premiums plus current-account balances is subject to TNS social contributions on top of the PFU. On a dividend of €50,000, that difference can run to several thousand euros. For a deeper treatment, see our dividends vs salary: how to arbitrate analysis.

The taxpayer can also opt for the progressive income-tax scale with a 40 % dividend allowance — an option worth modelling if the president is in a low tax bracket or not liable for income tax.

Corporate tax with the reduced rate accessible from year one#

A SASU is subject to corporate income tax (IS) by default. In 2026, the standard rate is 25 % and the reduced rate of 15 % applies to the portion of profit up to €42,500, provided the company qualifies as an SME: turnover below €10 million, fully paid-up share capital, and at least 75 % held by individuals.

A temporary option for personal income tax (IR) is technically available for companies less than five years old that meet specific legal conditions, but it remains the exception rather than the rule.

A credible image and an easy upgrade to multi-shareholder SAS#

A SASU is generally perceived as more substantial than a sole-trader structure or a micro-enterprise, particularly by corporate clients, banks, and suppliers. That alone is not a decisive criterion, but in practice the legal form can smooth commercial negotiations and facilitate the opening of a business account.

More importantly, converting a SASU into a SAS does not require dissolution and re-incorporation: you simply admit a new shareholder by amending the bylaws. This is considerably simpler than transitioning from a SARL to a different structure if your shareholding evolves quickly. For the founding-stage comparison, see our SARL or SAS: how to choose guide.

High social charges on salary#

This is the critical figure to understand before choosing the SASU. As an assimilated employee, the SASU president faces social contribution rates in the range of 70–80 % of net salary paid (roughly 54–55 % of total employer cost). For a net monthly salary of €3,000, the total cost to the company exceeds €5,000 per month.

This reality does not invalidate the choice of SASU, but it heavily conditions the remuneration strategy. If your sole objective is to draw a high salary while minimising levies, the EURL under the TNS regime may be less expensive on that single criterion — though the comparison should always account for the lower retirement and health coverage of the TNS scheme.

No unemployment insurance#

The SASU mandate generates no entitlement to unemployment benefit. If you are leaving a salaried position to incorporate, consider whether you can maintain ARE (return-to-employment allowance) rights during a parallel-activity period, or plan a personal cash reserve that replaces several months of salary. This point fundamentally changes the personal security equation, especially in the early months.

Real administrative formalism and higher accountancy cost#

The SASU is not an administratively burdensome structure by French standards, but it is more demanding than a micro-enterprise or a sole-trader business. It requires proper double-entry accounting, written decisions by the sole shareholder for significant acts, annual accounts filed at the commercial registry, and statutory modifications processed through the INPI single window (guichet unique INPI, formalites.entreprises.gouv.fr).

The accounting cost is real and should be budgeted from the outset, particularly if the activity is still in a startup phase.

Oversized for simple, low-margin projects#

If your project is straightforward, not capital-intensive, and carries no prospect of capital-opening, the SASU may be disproportionate. The pattern we see most often: a founder chooses the SASU for its prestige, then discovers that the operating cost does not match the actual activity level during the first two years.

The SASU vs EURL comparison is the most common advisory question we handle at creation stage. There is no universal answer; it depends on your target remuneration, the level of social protection you require, and your development horizon.

Our reading: if you plan to draw a steady and substantial salary and value the retirement coverage of the general social security regime, the SASU is often the stronger choice. If your salary will be moderate and you want to contain social pressure, a serious EURL simulation is warranted. See our full SASU vs EURL comparison.

This is the most frequent operational question after incorporation. The answer depends on your profit level, personal income-tax bracket, and patrimonial objectives.

Worked example (pre-salary profit of €100,000)#

Assume your SASU generates €100,000 of accounting profit before the president's remuneration.

Scenario A — salary of €40,000 net + dividends on the balance

• Net salary paid: €40,000
• Approximate social contributions (~80 % of net): ~€32,000
• Taxable profit after remuneration and charges: ~€28,000
• Corporate tax at 15 % (SME reduced rate): ~€4,200
• Distributable result: ~€23,800
• PFU on dividends (31.4 %): ~€7,473
• Net dividends received: ~€16,327
• Total net received (salary + dividends): ~€56,327 — with full general social security coverage.

Scenario B — zero salary + maximum dividends

• Taxable profit: €100,000
• Corporate tax (15 % on €42,500 + 25 % on €57,500): ~€20,750
• Distributable result: ~€79,250
• PFU (31.4 %): ~€24,884
• Net dividends: ~€54,366
• No social protection accrued under the mandate.

These figures are illustrative and sensitive to your personal income-tax bracket, the progressive-scale option, and actual company charges. They do not replace a simulation run on your own data.

Key point: a purely dividend-based strategy reduces your pension entitlements and disability-death coverage. The optimal salary/dividend mix balances social protection, personal income tax, and company cash flow.

1. What monthly net salary do you need to live on? — Calculate the total social cost the company will bear.
2. Do you need solid pension coverage? — The general social security regime is typically more comprehensive than the TNS scheme.
3. Can you start without drawing a salary? — Zero contributions with zero remuneration is a genuine SASU advantage during the testing phase.
4. Are you planning a co-founder, investor, or equity raise within three years? — The SASU makes this structurally simpler.
5. Does your projected turnover justify the accountancy cost? — Below a certain threshold, a lighter structure may be more appropriate.
6. Model the comparison with an EURL on real projections — the choice should never be made on instinct alone.

In the creation files we work on, two founder profiles consistently choose the SASU for well-grounded reasons.

The first is the consultant or B2B service provider who starts alone, targets corporate clients, and already knows they may open the capital to a partner or bring in an investor within two to three years. The statutory flexibility of the SASU justifies the higher social cost compared to an EURL.

The second is the employee who creates an activity alongside their job and initially draws no salary from the company. The absence of minimum social contributions at zero remuneration makes the SASU very inexpensive to maintain during the testing phase — unlike the EURL, where minimum TNS contributions run regardless of income.

Conversely, when a founder tells us their sole objective is to "pay as little social charges as possible," we always take time to run a side-by-side SASU vs EURL simulation on projected figures. In that scenario, the SASU is not always the right answer.

The PFU increased to 31.4 % from 1 January 2026 (from 30 % previously), following the 1.4-point rise in social levies on capital income enacted by the LFSS 2026. The dividend advantage of the SASU over a SARL or EURL majority manager remains meaningful, but the net dividend yield is slightly lower than before. Source: PFU rate update, service-public.fr.

The ACRE scheme (partial exemption from social contributions at start-up) can reduce the social bill during the initial period if you qualify. Check eligibility conditions with URSSAF before finalising your cost projections.

All statutory modifications are now processed through the INPI single window (formalites.entreprises.gouv.fr). The SASU's administrative requirements are real but fully manageable with structured accountancy support.

We assist with SASU incorporation in Paris and the greater Île-de-France region: bylaws drafting, tax and social regime selection, remuneration strategy, financial projections, and ongoing accountancy. See our business creation Paris and Paris 8 chartered accountancy service pages.

Disclaimer. The figures and rates in this article reflect official sources as of 1 June 2026 (service-public.fr, LFSS 2026). The worked example is illustrative only and does not constitute personalised advice. Your income-tax bracket, overall income structure, and patrimonial situation may significantly change the conclusions. A definitive decision requires review of your specific file by a qualified accountant (expert-comptable).

Sources: SASU taxation — SASU social contributions — PFU update — SAS — EURL — service-public.fr, 2026.