What legal structure should you choose when starting a business in Luxembourg?

Choosing a legal structure is one of the most important decisions when starting a business in Luxembourg. It will affect your personal liability, tax treatment, social security coverage, administrative obligations, and the growth prospects for your business.

There is no single “ideal” legal structure. The best choice depends on many factors: Do you want to start the business alone or with partners? What is your level of investment? Do you plan to hire employees, bring in investors, or grow your business rapidly?

This guide outlines the main legal structures available in Luxembourg, along with their advantages and limitations. You’ll also learn about the key administrative steps to take after choosing your legal structure.

If you’re still in the planning stages, we recommend consulting our guide, “Starting or Acquiring a Business in Luxembourg.” Before launching your business, also take the time to prepare your business plan and financing plan—two essential elements for ensuring the success of your project.

Why is choosing a business’s legal structure so important?

The legal structure does not merely determine how your business will be registered. It also influences your day-to-day operations as an entrepreneur, your level of protection, and the potential for your business to grow.

Depending on the legal structure you choose, the implications may include:

• your personal liability in the event of financial difficulties;
• the tax regime applicable to your business;
• your enrollment in the social security system;
• the formalities involved in setting up and managing the business;
• the possibilities for bringing in new partners or investors;
• your business’s credibility with certain commercial or financial partners.

Comparison of the Main Legal Structures in Luxembourg

Luxembourg offers several legal structures tailored to different types of entrepreneurs. Some are ideal for sole proprietorships, while others are better suited for ventures requiring multiple partners or significant investment.

Legal Structure	For what type of project?	Minimum Capital	Liability	Number of Partners
Sole proprietorship	Consultant, self-employed professional, business operated alone.	None.	Unlimited.	1.
SARL-S	Entrepreneur wishing to limit their initial investment.	Starting at 1 €.	Limited to capital contributions.	1 or more.
SARL	SMEs, retail, skilled trades, family businesses.	€12,000.	Limited to capital contributions.	1 to 100.
Corporation	A company intended to grow or attract investors.	€30,000.	Limited to capital contributions.	1 or more.

In summary: Which legal structure should you choose?

Every project is unique, but the following scenarios can help you quickly identify the most common legal structures.

Your situation	Generally suitable legal structure
You’re starting out on your own with little investment.	Sole proprietorship or SARL-S.
You want to protect your personal assets.	Limited Liability Company (SARL) or SARL-S.
You’re starting a business with several partners.	Limited Liability Company (SARL).
You’re considering bringing in investors.	Corporation (SA).
You’re launching a startup with high growth potential.	Start as an SARL, then potentially transition to an SA depending on the company’s growth.

The main legal structures for starting a business in Luxembourg

Luxembourg offers several legal structures suited to a wide range of entrepreneurial profiles. In practice, four structures account for the vast majority of new business formations: the sole proprietorship, the SARL-S, the SARL, and the SA.

Sole Proprietorship: The Simplest Solution for Starting a Business on Your Own

The sole proprietorship is often chosen by consultants, independent professionals, artisans, or service providers who wish to start their business quickly. This structure does not create a separate legal entity: the business and its owner form a single entity.

This legal structure is particularly suitable if:

• you’re starting out on your own;
• your investment is limited;
• you want relatively simple startup procedures;
• you prefer a streamlined administrative process.

Its main limitations:

• you are personally liable for business debts;
• Your personal assets may be at risk depending on the circumstances;
• this structure may become less suitable as the business grows significantly.

If you’re self-employed, also check out our guide to self-employment and coworking spaces in Luxembourg.

The SARL-S: Forming a Company with Limited Investment

Created to encourage entrepreneurship, the simplified limited liability company (SARL-S) allows you to form a company with a reduced initial capital. It offers the advantage of limiting the liability of the partners while remaining more accessible than a traditional SARL.

It is often an attractive option for:

• testing an entrepreneurial project;
• launching a first commercial or craft business;
• protecting personal assets;
• preparing for the future growth of your business.

However, the SARL-S is subject to certain conditions, particularly regarding the types of activities it may engage in and the individuals authorized to form it. As the business grows, some entrepreneurs then choose to convert their company into an SARL.

The SARL: The Most Commonly Used Legal Structure in Luxembourg

The Société à Responsabilité Limitée (SARL) is currently the most common legal structure for small and medium-sized businesses in Luxembourg. It allows for the separation of personal assets from those of the business while providing a legal framework recognized by business partners, banks, and investors.

The SARL is particularly well-suited if:

• you are starting a business with one or more partners;
• you wish to protect your personal assets;
• you plan to hire employees;
• you wish to grow your business sustainably.

On the other hand, setting one up requires more administrative formalities and a higher minimum share capital than that of an SARL-S.

The SA: For Larger-Scale Projects

The Société Anonyme (SA) is generally preferred by companies that are planning significant growth, wish to attract new investors, or raise capital.

This structure offers great flexibility for bringing in new shareholders and is particularly well-suited for:

• fast-growing companies;
• startups planning multiple rounds of fundraising;
• projects requiring significant investment;
• companies aiming to expand internationally.

On the other hand, the SA (public limited company) involves more structured governance, more extensive incorporation formalities, and a higher minimum capital requirement.

Other Legal Structures

Other legal structures exist in Luxembourg, such as the General Partnership (SNC), the Limited Partnership (SCS), the Limited Partnership with Share Capital (SCA), and the Special Limited Partnership (SCSp).

These legal forms address more specific needs, particularly in the context of investment projects, wealth management, or structures involving multiple categories of partners. They are generally established with the assistance of a notary, an attorney, or a certified public accountant.

What are the main steps to take after choosing your legal structure?

Choosing your legal status is only the first step in your entrepreneurial journey. To legally operate your business in Luxembourg, you’ll need to complete several administrative steps. Some of these are mandatory before you begin operations.

The order of these formalities may vary depending on your situation and business activity, but the process generally follows these steps.

1. Check whether your business requires a business license

Many commercial and craft activities, as well as certain self-employed professions, require a business license issued by the Ministry of the Economy.

Before taking any other steps, check whether your business is subject to this requirement and what professional qualifications or experience are required.

You can find all the information on Guichet.lu.

2. Incorporate your company

Depending on the legal structure you choose, incorporating your business may require drafting articles of incorporation, consulting a notary, and depositing the corporate capital with a bank.

The formalities are simpler for a sole proprietorship than for a business entity such as an SARL or an SA.

3. Register your business

Your business must then be registered with the Trade and Companies Register (RCS), where applicable.

Registration officially establishes your business and makes certain information publicly available.

4. Complete tax formalities

Depending on your business activity and revenue, you will need to complete various tax formalities, particularly regarding VAT.

Requirements vary depending on the nature of your business. It is recommended that you seek guidance as soon as you launch your project to avoid any errors in your tax filings.

5. Register with Social Security

Any entrepreneur conducting business in Luxembourg must complete the necessary formalities with the Joint Social Security Center (CCSS).

This registration is essential for your social security coverage and the payment of your contributions.

If you are self-employed, also consult our guide on the rights of self-employed individuals and unemployment benefits.

6. Open a business bank account

Depending on the legal structure you choose, opening a business bank account may be mandatory or strongly recommended to keep your business transactions separate from your personal finances.

This account will also simplify your administrative procedures and the day-to-day management of your business.

7. Purchase insurance tailored to your business

Certain types of insurance are mandatory depending on your profession, while others are strongly recommended to protect your business, your premises, your equipment, or your professional liability.

Before launching your business, take the time to identify the coverage that best suits your situation. Find our advice in our section dedicated to insurance in Luxembourg.

Who can help you choose your business structure?

You don’t have to make this decision alone. Several organizations can assist you with starting your business, choosing a legal structure, and handling administrative procedures.

• House of Entrepreneurship: information, guidance, and support for entrepreneurs.
• Chamber of Commerce: support for commercial and service businesses.
• Chamber of Trades: support for craft businesses.
• Guichet.lu: administrative procedures and official information.
• Certified Public Accountant, attorney, or notary: personalized support depending on the complexity of your project.

Choose the Right Legal Structure to Launch Your Business Under the Best Conditions

Choosing the right legal structure is a crucial step in the success of your entrepreneurial venture. By taking the time to analyze your current needs as well as your future growth prospects, you can select a structure that fits your business and avoid costly changes down the road.

To move forward with your project, also check out our guides on starting or taking over a business, business plans and financing, as well as self-employment and coworking spaces.

Frequently Asked Questions About Legal Structures in Luxembourg

What is the most common legal structure in Luxembourg?

The SARL is the most common legal structure for small and medium-sized businesses. It offers a good balance between personal asset protection and operational flexibility.

What is the difference between an SARL and an SARL-S?

The SARL-S allows you to form a company with a lower minimum capital requirement, subject to certain conditions. The standard SARL requires a higher minimum capital but offers greater opportunities for growth.

Can I start a business on my own?

Yes. Depending on your business plan, you can choose a sole proprietorship, an SARL-S, or a single-member SARL.

Is a business license always required?

No. It depends on the type of business you’re conducting. Some professions are regulated, while others do not require this authorization.

Can I change my legal structure later on?

Yes. It is possible to change your business’s legal structure as it grows, but this change involves certain formalities and may have legal, tax, or accounting implications.