You have just received the Kbis — the official registration certificate issued by the greffe, the registry office of the French commercial court — and your name appears on it as président of your new société par actions simplifiée (SAS, the flexible French company form most foreign founders choose). A few weeks later, a second letter arrives, this time from URSSAF, the French body that collects social security contributions. It asks for money, sometimes a large amount, and it uses words you have never seen: assimilé salarié, travailleur non salarié (TNS, the self-employed status), assiette forfaitaire (a flat-rate calculation base), mise en demeure (a formal demand to pay). This article explains, in plain English, which French social security regime applies to you from the day you are appointed, what your first bill is made of, and exactly how to react when URSSAF reassesses you. It covers both the SAS and its cousin the société à responsabilité limitée (SARL, the French limited liability company with stricter statutory rules), because many founders hesitate between the two and the social security answer is completely different. Every decisive statement below is anchored to the statute or ruling quoted beside it, so you can check each point yourself on Légifrance, the official French legal database, or on the website of the Cour de cassation, France’s highest civil court.

I. Which Social Security Regime Applies When a Foreign Founder Runs a French Company

French law does not ask for your passport before affiliating you. It asks what mandate you hold, whether that mandate is paid, and how much of the capital you own. Three questions, three answers — and the wrong answer costs thousands of euros a year.

A. Paid President of a SAS: Why You Join the General Regime

The SAS is managed by a president appointed under the conditions set by the articles of association. Article L. 227-6 of the Commercial Code states: “La société est représentée à l’égard des tiers par un président désigné dans les conditions prévues par les statuts” — the company is represented toward third parties by a president appointed as the articles provide. That president may be a foreigner, may live abroad, and may hold 100 percent of the shares. None of that changes the social security analysis. What matters is the remuneration attached to the mandate.

If you are paid as president — or as directeur général (chief executive) or directeur général délégué (deputy chief executive) of the SAS — you are brought inside the régime général, the general social security scheme that covers employees. Article L. 311-3 of the Social Security Code lists: “Les présidents et dirigeants des sociétés par actions simplifiées et des sociétés d’exercice libéral par actions simplifiées” — the presidents and senior officers of SAS companies are compulsorily covered. You are then called an assimilé salarié: you pay roughly like an employee for health, retirement (basic state pension), family benefits, workplace accidents and the CSG-CRDS levies, but you do not get unemployment insurance, and you cannot claim paid-leave indemnities from an employer who is yourself. Your contributions are computed on your actual remuneration and, as article L. 242-1 of the Social Security Code provides: “Les cotisations de sécurité sociale dues au titre de l’affiliation au régime général des personnes mentionnées aux articles L. 311-2 et L. 311-3 sont assises sur les revenus d’activité” — contributions due for persons covered under articles L. 311-2 and L. 311-3 are assessed on earned income. In practice the company withholds your share each month through the déclaration sociale nominative (DSN, the monthly online payroll return every French employer files) and pays the employer’s share on top, exactly as it would for a salaried executive.

The Cour de cassation confirmed this architecture in a ruling every foreign president should know. In Cass. 2nd civil chamber, 5 June 2025, no. 23-13.887, the Court recalled: “Selon l’article L. 311-3, 23°, du code de la sécurité sociale, dans sa rédaction applicable au litige, sont obligatoirement affiliés aux assurances sociales du régime général les présidents et dirigeants des sociétés par actions simplifiées et de sociétés d’exercice libéral par actions simplifiées” — under article L. 311-3, 23°, the presidents and officers of SAS companies are compulsorily affiliated to the general scheme. The case concerned a chairman of a supervisory board whose company argued he only supervised and therefore owed nothing. The Court drew the line precisely: “ayant pour seule mission de contrôler les organes de direction de la société sans en assumer la gestion, les membres du conseil de surveillance ne sont en principe pas affiliés aux assurances sociales du régime général, sauf à démontrer qu’ils exercent en réalité une fonction de direction” — members of a supervisory board, whose sole task is to oversee the management bodies without managing, are in principle not affiliated to the general scheme, unless it is shown that they actually perform a management function. Because the chairman in that case was registered in the BODACC — the Bulletin officiel des annonces civiles et commerciales, the official gazette where company appointments are published — as a person habitually empowered to bind the company, and designated as an officer on the M2 amendment form filed with the company registry, the reassessment was upheld. The lesson for a foreign founder is direct: if your name is published as the person who runs the SAS and you draw pay, URSSAF will affiliate you to the general regime, and the courts will back it. Conversely, a purely supervisory role with no management power and no pay does not trigger affiliation — but you must be able to prove the absence of any real management function, and a BODACC entry describing you as empowered to bind the company will be used against you.

Two practical consequences follow. First, an unpaid SAS president owes no social security contributions on the mandate itself: no salary, no assessment base, no bill — though you remain liable for contributions on any separate employment contract only if that contract reflects genuine subordinate work, a situation URSSAF examines with suspicion when the employee is also the president. Second, dividends you receive as a shareholder of your SAS are not remuneration for the mandate and do not enter the general-regime base: the company owes contributions only on what you earn as an officer, a boundary the courts police strictly, as the second ruling discussed below confirms.

B. Majority Manager of a SARL: Why You Pay as Self-Employed

Choose a SARL instead and the logic flips. Article L. 223-18 of the Commercial Code opens with a simple rule: “La société à responsabilité limitée est gérée par une ou plusieurs personnes physiques” — the SARL is managed by one or more natural persons, called gérants (managers). A gérant who, alone or together with co-managers, holds more than half of the capital — counting shares owned by a spouse, civil partner or minor children — is classified as a travailleur non salarié (TNS), a self-employed worker. A minority or non-shareholder gérant who is paid falls instead under the general regime through article L. 311-3, 11°, of the Social Security Code, which covers managers of SARLs who do not together own more than half of the capital. So the capital table decides your regime: majority manager means the independent workers’ scheme; minority paid manager means the general scheme like a SAS president.

The independent scheme is administered through the general system since the former Régime social des indépendants was absorbed, but its economics remain distinct. Article L. 611-1 of the Social Security Code defines its personal scope, starting with: “Les travailleurs non salariés qui ne sont pas affiliés au régime mentionné au 3° de l’article L. 722-8 du code rural et de la pêche maritime” — non-salaried workers who are not covered by the agricultural scheme. If you are a majority gérant, you belong here by operation of law from the day of your appointment, whether or not URSSAF has written to you yet. The base is your professional income, and article L. 131-6 of the Social Security Code provides: “Les cotisations de sécurité sociale dues par les travailleurs indépendants non agricoles ne relevant pas du dispositif prévu à l’article L. 613-7 sont assises sur l’assiette définie à l’article L. 136-3” — contributions owed by non-agricultural independent workers outside the micro-regime of article L. 613-7 are assessed on the base defined at article L. 136-3, essentially your business profit. That base includes dividends paid to a majority gérant above a statutory threshold, which is why founders who planned to “take dividends instead of salary” sometimes discover that the strategy barely reduces the bill in a SARL — whereas in a SAS, dividends paid to the president escape social contributions. This single asymmetry drives many foreign founders toward the SAS, and it should be priced before you choose the company form, not after the first reassessment.

Timing matters as much as the rate. Article L. 131-6-2 of the Social Security Code makes these contributions due annually, then states: “Elles sont calculées, à titre provisionnel, sur la base de l’assiette de cotisations prévue à l’article L. 131-6 pour l’avant-dernière année” — they are calculated provisionally on the base of the year before last. For newcomers the statute adds: “Pour les deux premières années d’activité, les cotisations provisionnelles sont calculées sur la base d’une assiette forfaitaire fixée par décret” — for the first two years of activity, provisional contributions are calculated on a flat-rate base set by decree. Concretely, a foreign founder who becomes majority gérant in September receives provisional bills computed on that decree base even though the company has earned almost nothing yet; when the real income for the year is finally known, URSSAF recalculates and either claims the balance or credits the overpayment. The first-year shock is therefore normal, but it must be budgeted: founders who leave the letters unopened return a year later to a mise en demeure loaded with surcharges.

The boundary between mandate income and other income is policed just as strictly in the SARL world. In Cass. 2nd civil chamber, 24 June 2021, no. 20-11.723 — a case that involved, tellingly, a British limited company operating in France — URSSAF had folded into the contribution base a fee the manager received under a separate location-gérance agreement (a contract leasing his clientele to the company). The Cour de cassation quashed the reassessment, holding: “Il résulte de la combinaison des deux premiers de ces textes qu’une société ne peut être tenue au paiement des cotisations dues pour son gérant, lorsqu’il est assujetti au régime général en application du troisième, que sur la rémunération perçue par ce dernier en contrepartie ou à l’occasion de ses fonctions” — a company can be held liable for contributions due for its manager, when he is covered by the general regime, only on remuneration received in return for or in connection with his functions. Sums paid under an independent commercial arrangement, not as consideration for the corporate office, fall outside the base. For a foreign founder this is both a shield and a warning: keep the mandate, the employment relationship if any, and the commercial contracts in three separate, properly documented piles, because URSSAF will try to merge them and only clean paperwork lets a court split them apart.

One last situation deserves a clear answer because founders ask it constantly: the unpaid officer. A SAS president or SARL gérant who receives strictly zero remuneration — no salary, no benefits in kind, no disguised payment — owes no contributions on that empty mandate in either regime, since both bases (earned income under article L. 242-1, professional income under article L. 131-6) are zero. But the exemption is fragile: any payment recharacterised as remuneration — current-account withdrawals treated as advances on salary, personal expenses paid by the company, fees routed through a foreign vehicle — resurrects the debt with retroactive effect. Founders resident abroad sometimes assume distance protects them; it does not. Affiliation follows the French mandate, and URSSAF notifies the company at its French registered office regardless of where the officer sleeps.

II. Your First URSSAF Bill in France: Amount, Calendar, and How to Contest It

Knowing your regime is half the battle. The other half is reading the bill, paying on time, and reacting correctly when the amount looks wrong. Foreign founders lose most of their disputes not on the law but on missed deadlines and unanswered letters.

A. How Much You Pay and When the Money Leaves Your Account

Start with the SAS president, because the mechanics resemble payroll. Each month (or quarter for very small companies that opt for quarterly settlement), the company declares your gross remuneration in the DSN and pays both the employee’s share — withheld from your pay — and the employer’s share, which in France represents the larger part of the total. The exact overall burden moves every year with the plafond de la sécurité sociale (the annually revised ceiling that caps several contribution bands) and the rates voted in the social security budget, so resist any blog post quoting a fixed percentage as eternal truth: check the current scales on the official urssaf.fr rate pages and your accountant’s payslip simulation before signing a remuneration level into the minutes. What never changes is the base rule quoted above — contributions sit on earned income from the mandate — and the calendar: DSN filing and payment fall due in the days following each pay period, with late payment triggering surcharges that compound quickly. A founder who pays herself irregularly, in lump sums decided abroad, still owes contributions for the period to which the income attaches, and URSSAF reconstitutes the timeline from the company’s accounts during an audit.

Now the SARL majority gérant. Here there is no payslip and no DSN for the mandate: you declare your professional income once a year through the single tax-and-social return (déclaration de revenus shared with the tax administration), and URSSAF bills you directly as an individual. Year one and year two run on the flat-rate provisional base set by decree, which means you pay even if the company made no profit — a frequent shock for founders who assumed “no profit, no contributions.” From year three onward, the provisional bill is computed on the income of the year before last and regularised once the final income is known, with the statute’s mechanism operating automatically: overpayments generate a credit against future bills, underpayments generate a balance due, and persistent underestimation can draw penalties. Keep every appel de cotisations (the contribution notice URSSAF sends), reconcile it against your tax return, and instruct your accountant to request a modulation of the provisional base the moment your income drops — waiting for the automatic regularisation means lending URSSAF money interest-free for up to two years, while overpaying nothing means risking a shortfall plus surcharges.

Three cost traps specific to foreign founders deserve emphasis. First, the double-billing illusion: a founder who is simultaneously president of a French SAS and self-employed in another country sometimes pays social charges twice on the same income. Within the European Union and the European Economic Area, the coordination regulations designate a single competent state — generally where the substantial activity is performed — and an A1 certificate proves it; with non-EU states, only a bilateral social security agreement can prevent duplication, and the United States, the United Kingdom and most Gulf states each have their own position. Ask for the certificate before the first payroll run, not after URSSAF bills you, because refunds across borders take years. Second, the minimum-contribution floor: several contributions (notably basic retirement and daily sickness allowances for the self-employed) carry annual minimums, so a token salary of one euro does not buy coverage at one euro of cost — it buys the floor. Third, the CSG-CRDS layer: these levies apply to a slightly wider base than classic contributions and follow their own rules, which is why the “total charge” on a payslip always exceeds the sum of the contribution lines a founder first adds up. None of these traps is a reason to avoid France; each is a reason to simulate the full cost with an accountant before fixing your remuneration in the shareholders’ minutes, because minutes are easy to adopt and painful to unwind.

B. How to Contest a Reassessment After a URSSAF Audit

Most disputes begin the same way: an auditor examines several financial years, then sends a lettre d’observations (the letter setting out the proposed reassessment, point by point). This letter is the most important document of the entire dispute. You have a short window — the deadline printed on the letter itself — to reply with facts, contracts and accounting evidence. Silence at this stage is routinely fatal: courts treat unanswered observations as accepted, and the later judges will ask what you said at the time. Answer every point, attach the articles of association, the minutes fixing remuneration, the BODACC publication, the M2 form, the employment contract if one exists, and the commercial agreements you want kept out of the base. If you are a SAS president arguing that part of the sums are dividends, produce the shareholders’ resolution distributing them; if you are a manager arguing that fees came from a separate contract, produce that contract and the invoices, exactly the sorting exercise the 2021 ruling above rewards.

If URSSAF maintains its position, it issues a mise en demeure, the formal demand that makes the debt enforceable and starts the clock for court review. From receipt, you must first file an administrative appeal before the commission de recours amiable (CRA, the internal appeals board of the URSSAF fund) within the period stated on the demand — this prior appeal is mandatory and missing it closes the courthouse door. Frame the CRA petition as a lawyer would a pleading: identify each contested head of reassessment, cite the article that governs it, quote the ruling that supports you, and quantify the alternative base you accept. The two decisions examined in this article give you ready-made paragraphs: for an SAS officer, the 2025 ruling’s test — supervision alone is not affiliation, real management power is — and for a SARL manager, the 2021 ruling’s boundary — only remuneration received in return for or in connection with the functions enters the base. Attach everything, because the CRA decides on the file and rarely holds hearings.

If the CRA rejects the appeal expressly or stays silent past its decision period, the dispute moves to the tribunal judiciaire (the ordinary civil court, whose socially specialised chamber hears social security cases), and the enforcement mechanism becomes the contrainte — an enforceable order URSSAF issues to recover the debt, which you can oppose before that same court within its stated deadline. Three discipline rules decide these cases more often than doctrine. First, never pay the contrainte without marking the payment as made under protest and continuing the challenge: an unreserved payment reads as acquiescence. Second, keep the company’s registered office monitored — URSSAF notifies the company in France, and founders living abroad discover mises en demeure months late in unopened mail, long after the CRA window has closed. Appoint a person in France to open, scan and forward every administrative letter within days. Third, preserve evidence of actual functions from day one: board minutes describing who decided what, delegation tables, email trails showing who signed investments. The 2025 case turned precisely on such traces — BODACC wording, the M2 form, investment powers — and your file will be judged the same way. Founders who build this paper trail when everything is calm win the audit three years later; founders who reconstruct it after the lettre d’observations arrives usually lose.

Conclusion

A foreign founder who takes office in a French company chooses a social security destiny at the same time: paid president of a SAS means the general regime on all mandate remuneration, with dividends outside the base; majority manager of a SARL means the self-employed regime on professional income, with provisional flat-rate bills in the first two years and automatic regularisation afterward; unpaid mandates in either form mean no contributions until a payment is recharacterised as pay. The statutes draw these lines — articles L. 311-3, L. 242-1, L. 131-6 and L. 131-6-2 of the Social Security Code, articles L. 227-6 and L. 223-18 of the Commercial Code — and the Cour de cassation enforces them, affiliating SAS officers who actually manage (5 June 2025, no. 23-13.887) while refusing to let URSSAF tax income unconnected to the mandate (24 June 2021, no. 20-11.723). Price the regime before choosing the company form, simulate the full first-year cost with an accountant, register for the correct declaration channel from month one, and answer every URSSAF letter inside its printed deadline through the CRA and, if needed, the tribunal judiciaire. Run this way, the French system is predictable and contestable; ignored, it compounds silently until the contrainte arrives.

Need a quick opinion on your case

If URSSAF has reassessed your French company or you are about to take office as president or manager, call +33 6 46 60 58 22 for a telephone consultation within 48 hours with a lawyer of the firm. You can also reach us through our contact page with your Kbis and the URSSAF letter attached.