Starting a French SAS or SARL: A UK Entrepreneur's Guide

Wednesday, 29 July 2026

Expanding your business into France can be an exciting opportunity. For UK entrepreneurs, knowing how to start a business in France with the right structure is crucial for success. The two main options, SAS and SARL, each come with different rules for management, ownership, and taxation. Picking the right one can affect everything from how you run the company to your cross-border obligations. This guide explains the key differences between these structures, the tax considerations, and compliance requirements, giving you a clear roadmap for successfully starting a business in France.

Get in Touch

What is a French SAS?

A SAS (Société par Actions Simplifiée) is a flexible type of limited company in France, making it an ideal option for setting up a SAS in France. It allows founders to control governance while adapting as the company grows.

Flexible governance: You must appoint a President, but the roles and decision-making processes can be tailored in the company's statutes.
Shareholding freedom: Shares can be issued or transferred with fewer restrictions, making it easier to bring in investors or partners.
Growth-focused: SAS structures are ideal for businesses looking to scale or attract external investment.
Popular with foreign founders: UK entrepreneurs often choose a SAS for its adaptability and clear framework for cross-border operations.

The SAS is particularly suitable for startups or businesses that want flexibility in management and ownership while planning for growth in France.

What is a French SARL?

A SARL (Société à Responsabilité Limitée) is a more traditional limited company structure in France, often preferred by entrepreneurs setting up a SARL in France who want a clear, formal framework for management and ownership.

Structured governance: Managed by one or more managers (gérants) with defined powers and responsibilities.
Tighter ownership control: Share transfers are strictly regulated, which helps maintain stability among owners.
Predictable framework: Less flexible than a SAS, but provides certainty for small businesses or family-owned ventures.
Well-suited for smaller operations: Ideal for UK entrepreneurs who want a straightforward, controlled structure without the need for complex governance arrangements.

The SARL is often chosen by businesses that prioritise stability and clear rules over flexibility, making it a reliable option for small or closely held companies expanding into France.

SAS vs SARL: Key Differences

When choosing between a SAS and a SARL, UK entrepreneurs need to understand the main differences in management, ownership, and flexibility.

Management Structure

SAS: Highly flexible. Requires a President, but roles, responsibilities, and decision-making processes can be tailored in the statutes.
SARL: More rigid. Managed by one or more managers (gérants) with powers defined by law and company statutes.

Share Transfer Rules

SAS: Shares can be transferred more flexibly, depending on rules in the statutes. Ideal for bringing in investors.
SARL: Transfers are tightly controlled, often requiring approval from other shareholders.

Flexibility of Constitutional Documents

SAS: Highly adaptable, allowing custom governance and shareholder agreements.
SARL: Standardised framework with limited flexibility.

Typical Use Cases

SAS: Startups, growth-focused businesses, and foreign entrepreneurs seeking flexible governance.
SARL: Small businesses, family-owned ventures, or UK founders who prefer a structured, predictable legal framework.

Choosing the right structure depends on your growth plans, ownership preferences, and the level of flexibility you need in your French business.

Tax Considerations for UK Entrepreneurs

Understanding tax implications is crucial when setting up a SAS or SARL in France, especially for UK entrepreneurs managing cross-border operations.

Corporate Tax

French companies are subject to corporate tax, currently around 25% for most profits.
Smaller profits may benefit from reduced rates.
Both SAS and SARL are taxed similarly at the corporate level, though certain exemptions may apply depending on business size or activity.

Directors' Remuneration and Social Charges

Salaries paid to directors are subject to social charges, which can be significant.
SAS: Offers flexibility to optimise remuneration and reduce social contributions.
SARL: Remuneration rules are more rigid, with mandatory contributions based on statutory rates.

Dividend Treatment

Dividends paid to shareholders may face withholding tax in France.
UK residents must consider the UK-France double taxation treaty to avoid being taxed twice.
SAS structures often provide more flexibility in how dividends are distributed compared to SARL.

Cross-Border Tax Issues

UK entrepreneurs need to account for both French and UK tax obligations.
Income from French operations may need to be reported to HMRC, depending on residency and corporate structure.
Early tax planning is essential to avoid unexpected liabilities and ensure compliance in both countries.

Cross-Border Compliance Obligations

For UK entrepreneurs, planning French company formation properly means understanding compliance in both France and the UK. Doing so early helps prevent fines, delays, and costly mistakes.

Company Registration

All French companies must be registered with the Trade and Companies Register (RCS). This process requires a company name, formal statutes, proof of address, and identification of directors and shareholders. Proper registration ensures your business is legally recognised and can operate without restrictions.

Tax Registration and Accounting

French law requires companies to register for corporate tax, VAT, and payroll taxes if they employ staff. Both SAS and SARL must maintain accurate accounts and prepare annual financial statements. Keeping records up to date is essential for audits and compliance.

Reporting Requirements in France

Companies must submit annual financial statements and, where applicable, social declarations for employees. Some sectors or businesses above certain thresholds may face additional reporting obligations. Missing deadlines can lead to penalties or administrative restrictions.

UK Obligations

Even when operating through a French entity, UK founders may still have reporting responsibilities to HMRC. This can include declaring overseas income and paying tax on dividends or salaries received from the French company. Residency, company structure, and cross-border agreements will determine the exact requirements.

Which Structure is Right for You?

Choosing between a SAS and a SARL depends on your business goals, ownership preferences, and plans for growth.

A SAS is usually the better option for businesses that plan to scale, take on investors, or require flexible governance. Its adaptable management structure allows founders to tailor decision-making processes and shareholding arrangements. This makes it particularly appealing to UK entrepreneurs entering the French market with ambitious growth plans or multiple stakeholders.

On the other hand, a SARL tends to suit smaller businesses or closely held companies where stability and control are priorities. Its more formal management framework and strict rules around share transfers help maintain order among a limited number of owners. UK founders who prefer predictability and straightforward compliance often choose this structure.

Ultimately, there's no one-size-fits-all answer. The right choice will depend on the size of your business, how you plan to manage ownership, and your approach to taxation and cross-border operations. Careful consideration at the planning stage can save time, money, and administrative headaches down the line.

Common Mistakes UK Founders Make

When expanding into France, UK entrepreneurs often make avoidable mistakes that can lead to extra costs or compliance issues.

Key pitfalls include:

Choosing a structure without understanding tax consequences: Selecting a SAS or SARL without evaluating corporate tax, social charges, or dividend implications can be costly.
Overlooking social charges or payroll obligations: French social contributions are mandatory for directors and employees, and underestimating them can create unexpected liabilities.
Failing to plan for cross-border reporting: Income from a French company may need to be reported to HMRC, and missing this step can lead to penalties.
Assuming UK rules and French rules work the same way: French corporate, tax, and employment laws differ significantly, so UK practices cannot be directly applied.
Delaying professional advice: Waiting too long to consult French accountants or legal advisers can result in structural mistakes that are expensive to correct.

When to Seek Specialist Advice

Expanding into France involves navigating complex legal, tax, and compliance requirements. For UK entrepreneurs, seeking professional guidance early can save time, money, and avoid unnecessary complications.

Legal advice: French company law differs significantly from the UK. A French legal adviser can help draft statutes, define governance structures, and ensure your SAS or SARL is set up correctly.
Tax advice: Understanding corporate tax, social charges, and cross-border obligations is crucial. Tax specialists can help optimise remuneration, dividend strategies, and compliance with both French and UK rules.
Cross-border planning: Early guidance ensures that UK founders remain compliant with HMRC while operating a French entity. This is especially important for personal income, dividends, and reporting obligations.

Getting expert advice before incorporation allows you to make informed decisions about structure, ownership, and long-term growth. It's far easier to prevent mistakes at the start than to fix them later.

Key Takeaways for UK Entrepreneurs Starting a French SAS or SARL

Choosing the right structure matters: Your choice between a SAS and a SARL will impact governance, ownership, flexibility, and long-term growth. SAS is typically better for businesses planning to scale or take on investors, while SARL is suited for smaller or closely held companies that prioritise stability.
Governance flexibility vs formal structure: SAS allows founders to tailor roles, decision-making processes, and shareholding arrangements. SARL has a more rigid framework with defined managers (gérants) and stricter rules for share transfers.
Tax implications are key: Both SAS and SARL are subject to corporate tax, social charges on directors' remuneration, and dividend withholding tax. Early planning helps UK entrepreneurs navigate cross-border tax obligations and optimise tax efficiency.
Cross-border compliance is essential: French registration, accounting, VAT, and payroll rules must be followed, while UK founders may still have reporting duties to HMRC. Missing these obligations can lead to penalties or administrative complications.
Common mistakes to avoid: Choosing a structure without understanding tax consequences, overlooking social charges, assuming UK rules apply in France, failing to plan for cross-border reporting, and delaying professional advice are all pitfalls that can be costly.
Professional guidance saves time and money: Seeking French legal and tax advice early ensures correct company formation, compliance, and minimises risk. It also allows you to make informed decisions about ownership, governance, and remuneration before committing to a structure.
Long-term business planning is critical: Consider your business goals, investor strategy, and operational needs in France before incorporation. The right structure can support growth, attract investment, and simplify cross-border operations.

FAQs

How do I start a business in France as a UK entrepreneur?

To start a business in France, you need to choose a legal structure, register with the Trade and Companies Register (RCS), and comply with French tax and social obligations. Many UK founders select either a SAS or SARL depending on growth plans and ownership preferences. You'll also need to plan for cross-border reporting to HMRC if you remain a UK resident. Early consultation with French legal and tax advisers can simplify the process and help you avoid costly mistakes.

What is the difference between a French SAS and SARL?

A SAS offers flexible governance and shareholding rules, making it ideal for businesses seeking investment and growth. A SARL has a more formal framework with stricter rules on management and share transfers, which suits smaller or closely held businesses. Your choice impacts corporate tax planning, dividend distribution, and compliance obligations in both France and the UK.

Do UK founders need to pay tax in France and the UK?

Yes, UK entrepreneurs operating a French company may face taxation in both countries. Corporate tax, social charges, and dividend withholding apply in France, while income or dividends received may need to be reported to HMRC. The UK-France double taxation treaty helps prevent being taxed twice, but careful planning is essential to ensure compliance and optimise your tax position.

Start Your French Business Journey with France Tax Law

Expanding into France is a big step, and getting the structure right from the outset makes a real difference. Whether you choose a SAS or a SARL will shape how your business is run, how it's taxed, and how easy it is to grow in the future. Taking the time to understand these differences now can help you avoid unnecessary complications later on.

If you're planning to start a business in France and want to make sure everything is set up properly, speaking to the right experts early on is key. France Tax Law can guide you through the process, from choosing the most suitable structure to managing tax and cross-border requirements. If you'd like tailored advice for your situation, get in touch with the team today and take the next step with confidence.