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Opening a business in France: 5 common mistakes US companies make.

France offers one of Europe's most dynamic tech ecosystems — but the gap between American and French operating logic is wider than many founders expect. Here are the five most frequent missteps, and how to avoid them.

March 19, 2026Orbiss & Impulsa

1. Misunderstanding the legal structure: the SAS advantage

Choosing a structure that is too rigid is a classic pitfall. The SAS (Société par Actions Simplifiée) is the gold standard for scale-ups.

  • Contractual freedom. Bylaws can be drafted to mirror US practices — custom share classes, board composition, investor rights.
  • SASU. If the US parent is the sole owner, the SASU (single-shareholder version) offers the same flexibility with simpler governance.
  • The talent magnet (BSPCE). Only certain structures like the SAS qualify for BSPCE — France's tax-efficient stock options — a non-negotiable tool for hiring top-tier French engineering talent.

2. Underestimating the banking timeline

In the US, forming an LLC can take hours. In France, your company does not legally exist until you have a French bank account with the initial share capital deposited.

  • The barrier. French banks apply rigorous KYC and FATCA scrutiny for US-owned entities.
  • The timeline. Expect 4 to 8 weeks to open a business account.
  • The move. Start the banking process before anything else. Bylaws and legal notices can be handled in parallel.

3. The "at-will" employment fallacy

At-will employment does not exist in France. This is the most dangerous assumption a US founder can make.

  • Written contracts. Every employee must have a contract compliant with the Code du Travail and usually an industry-specific Collective Bargaining Agreement (typically Syntec for tech).
  • Termination. Ending a contract requires "real and serious cause," a strict legal procedure, and mandatory notice and severance.
  • Hidden employment. Hiring a "full-time freelancer" in France is often reclassified as travail dissimulé (hidden employment), leading to massive back-tax liabilities and social charges.

4. Assuming US accounting is "close enough"

French subsidiaries must maintain books under the Plan Comptable Général (PCG). It is a distinct framework, not just a cosmetic translation of US books.

  • The FEC requirement. You must be able to produce the Fichier des Écritures Comptables on demand. US software cannot generate it natively.
  • Tax triggers. Corporate income tax (IS) and VAT (TVA) obligations start immediately upon registration.
  • The auditor (CAC). Once certain thresholds (revenue / headcount) are met, you are legally required to appoint a Commissaire aux Comptes for a six-year term.

5. Filing with the wrong document standards

The Guichet Unique is efficient, but it does not compromise on document authenticity. Standard US photocopies will be rejected. Required for US parent documents (Articles of Incorporation, Board Resolutions):

  • Apostille. An international authentication issued by your Secretary of State.
  • Sworn translation. Must be performed by a Traducteur Assermenté (certified by a French court). Standard translations are not accepted.

Conclusion

France is a high-reward market, but the "checklist" approach isn't enough. By respecting the banking timelines, the legal specificities of the SAS, and the rigor of French accounting, you build a foundation for long-term European success.

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