SARL-S or sole trader: which freelance status should you choose in Luxembourg?

You have landed your first assignment, or you feel the time has come to leave employment and strike out on your own. Congratulations. But before you sign any contract, one question looms — and it is almost certainly the first real decision of your freelance life in Luxembourg: under which status will you operate? Sole proprietorship (self-employed / independent status) or SARL-S, the simplified limited liability company? That choice shapes your legal liability, your tax position, your accounting obligations and even the image you project to clients.

Good news: there is no universally wrong answer, only a status that fits your situation more or less well. In this guide, we review both options, their advantages and limitations, and the concrete criteria that should guide your decision on freelance status in Luxembourg.

Sole proprietorship: independent status in Luxembourg

The sole proprietorship is the simplest way to work as a freelancer in Luxembourg. You operate in your own name: legally, there is no distinction between you and your professional activity. You invoice clients directly, receive fees into your account, and declare professional income with your personal tax return.

Advantages of independent status

• Fast, simple setup: no articles of association to draft, no notary visit, no company to incorporate. Once you have your business permit (autorisation d'établissement), you can start.
• No minimum capital: you do not need to lock up a single euro to start working.
• Simplified accounting: no annual accounts to file and no publication duties. Cash-basis bookkeeping of income and expenses is enough in most cases.
• Low running costs: no formation fees, no accounts filing fees, and fiduciary fees that are usually lighter.

Drawbacks to be aware of

• Unlimited liability: this is the status's main weakness. Your personal and professional assets are one and the same. If you face business debt or a client dispute, your personal property can be at risk.
• Less corporate image: some large accounts, especially in finance, prefer to contract with a company rather than a natural person. That can close a few doors or complicate onboarding with certain clients.

SARL-S: incorporating in Luxembourg with €1

Introduced in 2017, the SARL-S (société à responsabilité limitée simplifiée) was designed specifically for sole entrepreneurs and freelancers. Its aim: to offer the protections of a company without the capital barrier. Where a classic SARL requires share capital of 12 000 euros, a SARL-S can be formed with a minimum capital of 1 euro.

The main benefit of the SARL-S is the separation between your personal assets and those of the company. Your liability is limited to the capital you contributed: if things go wrong, your personal assets are in principle protected.

Advantages of the SARL-S

• Liability limited to capital: your personal assets are separate from the business — a real safety net for high-stakes assignments.
• Stronger credibility: invoicing in a company's name reassures institutional clients and eases access to more demanding buyers.
• Deductible expenses: the company can bear and deduct professional costs (equipment, subscriptions, travel, training), which allows finer control of activity expenses.

Drawbacks of the SARL-S

• Heavier accounting duties: annual accounts to prepare and file, proper double-entry bookkeeping. Using a fiduciary becomes almost unavoidable.
• Annual running costs: accounting fees, filing fees, recurring administrative charges. These fixed costs weigh most in the early years, when turnover is still modest.
• More complex formation formalities: drafting articles of association, registering the company, opening a dedicated bank account. Nothing insurmountable, but clearly more steps than as a sole trader.

Also note that the SARL-S is reserved for natural persons: it is designed as a stepping stone. Many freelancers use it as a first vehicle, then convert it into a classic SARL (capital of 12 000 euros) when the activity grows, reserves build up or a partner joins. That is a natural later step, not an obligation from day one.

SARL-S or independent: a point-by-point comparison

To make things clear, here are the five criteria that truly set the two statuses apart:

• Liability: unlimited on your personal assets as a sole trader; limited to the capital contributed under a SARL-S.
• Capital: none required for the independent; minimum 1 euro for the SARL-S (12 000 euros for a classic SARL).
• Accounting: simplified for the independent; full accounts with annual filings for the SARL-S.
• Costs: almost nil at formation and low in operation for the independent; formation costs then annual management fees for the SARL-S.
• Image: status seen as less corporate for the independent; stronger credibility with large accounts for the SARL-S.

For a full overview of legal forms available in Luxembourg, see the dedicated Guichet.lu page on choosing a legal form.

Taxation: how is your income taxed?

This is often the factor that tips the balance, so here are the basics without turning this into personalised tax advice.

As a sole proprietorship

Your profits are subject to personal income tax, under Luxembourg's progressive scale from 0 % to 42 %. Your tax class (1, 1a or 2, depending on your family situation) directly affects the final amount. In practice: everything you earn is taxed in the year you earn it, whether you spend it or not.

Under a SARL-S

The company is taxed on its profits on its side, and you have flexibility a sole trader does not: you can pay yourself a salary (taxed on the progressive scale like any employment income) and top up with dividends. That salary + dividends mix lets you steer your pay package and, in some cases, optimise the overall tax burden — especially when turnover becomes comfortable. Every situation differs, so a discussion with a fiduciary or tax adviser remains essential before deciding on this criterion alone.

Steps common to both statuses

Whatever you choose, two compulsory steps await you.

The business permit (autorisation d'établissement)

To carry on a commercial, craft or intellectual services activity in Luxembourg, you must obtain a business permit (autorisation d'établissement) issued by the Ministry of the Economy. The application is online and processing usually takes 4 to 8 weeks. Plan ahead: no permit, no invoicing. All conditions and the procedure are set out on the official Guichet.lu page on the business permit.

Affiliation with the CCSS

You must then register with the Centre commun de la sécurité sociale (ccss.lu). Social contributions amount to about 24.65 % of your professional income and cover health insurance, pension and accident insurance. In a SARL-S, the manager who pays themselves a salary is also affiliated and contributes on that pay. In both cases, build these contributions into your rate: our Luxembourg daily rate (TJM) simulator helps you set a daily rate that accounts for them.

Which status to choose? Concrete decision criteria

Rather than a one-size-fits-all answer, here are the questions to ask yourself:

1. What turnover level are you aiming for? Below a certain activity level, a SARL-S's annual management fees eat a significant share of your income. A sole proprietorship is often more rational to start with or for a side activity. Conversely, with solid, regular turnover, the company's salary + dividends flexibility makes full sense.
2. How risky is your activity? A developer working on critical systems, a consultant whose error can cost the client dearly: the higher the exposure, the more valuable the limited liability of a SARL-S becomes. For low-risk work, a sole proprietorship (backed by solid professional liability insurance) may be enough.
3. Which clients are you targeting? In Luxembourg, some buyers — especially banks and financial institutions — sometimes require contracting with a company. If your target market is the financial centre, a SARL-S can be a commercial prerequisite more than a preference.
4. Do you plan to hire? If you see the business growing, bringing in a partner or recruiting a first employee, a company structure is better equipped for that path, with conversion to a classic SARL as the natural next step.

In short: the sole proprietorship is the choice of simplicity and a fast start; the SARL-S is the choice of protection and growth. Many freelancers begin as independents, validate their market, then switch to a company when the activity justifies it. That path is perfectly legitimate.

Get started: your status is only the first step

Choosing between SARL-S and sole proprietorship is an important decision, but it should not paralyse you. Neither status is irreversible, and the best status remains the one that lets you start invoicing. Once you have chosen, the real work begins: finding assignments, setting the right rate, building your reputation.

To go further, read our complete freelancing guide for Luxembourg, which covers every stage of your launch. And if you are ready to meet future clients, take five minutes to create your profile on freelancers.lu: it is free, and it is the best way to make your expertise visible to companies hiring IT freelancers in Luxembourg.