Becoming a Sole Trader in Belgium: The Simple Guide

Sole trader status (also known as operating "as a natural person" or self-employed in your own name) is the fastest and simplest way to launch a self-employed activity in Belgium. No notary, no minimum capital, no articles of association: within a few days, and for under EUR 200, you can start trading. In 2025, Belgium had around 1.1 million self-employed workers according to the NISSE (INASTI), a significant share of them operating as sole traders. Here is the complete guide to taking the plunge.

Sole Trader Versus Company: Understanding the Fundamental Differences

The choice between operating as a sole trader and setting up a company is the most defining decision for a first-time entrepreneur. It affects your taxation, your liability, your administrative duties and the protection of your personal assets.

Choose sole trader status if:

• Your projected income is below EUR 25,000/year at first — personal income tax (IPP) stays competitive thanks to the tax-free allowance (EUR 10,570 in 2026) and the lower brackets
• You want to start quickly and simply — registration takes one to two days through an enterprise counter (guichet d'entreprise)
• Your activity carries little financial risk — no large stock, no major investment, no significant supplier debt
• You are testing an idea before setting up a company — sole trader status is an excellent stepping stone
• You run a secondary activity — an employee or civil servant topping up their income (self-employed as a secondary activity, indépendant complémentaire)
• You are a student entrepreneur — the student self-employed status gives access to reduced social contributions

Move to a company (SRL) if:

These are the signals that suggest you have outgrown sole trader status:

• Your net income exceeds EUR 40,000–50,000/year — above this threshold, corporate tax (ISOC) at 20% for SMEs is clearly more advantageous than progressive personal income tax (up to 50%)
• Your activity carries risk — an SRL (private limited company) protects your personal assets
• You want to optimise your pay — as a company, you can combine salary, dividends (VVPR-bis at 15%), benefits in kind and group insurance
• You have partners or plan to bring some in
• You need extra credibility to win public contracts or larger clients

Comparing the figures: personal income tax versus corporate tax

To illustrate the tax difference, take a net professional income of EUR 60,000:

As a sole trader (personal income tax, 2026):

Add the municipal surcharge (6 to 9% depending on the municipality), roughly EUR 1,500–1,900 more.

As a company (corporate tax + remuneration):

In an SRL, you could pay yourself a EUR 45,000 salary (the minimum for the reduced SME rate) and leave EUR 15,000 in the company:

• Corporate tax on EUR 15,000 at 20% = EUR 3,000
• Personal income tax on the EUR 45,000 salary = around EUR 13,500 (after the tax-free allowance)
• Estimated total tax: ~EUR 16,500 (a saving of around EUR 6,000)

This simplified comparison shows why the EUR 40,000–50,000 threshold is often cited as the tipping point.

The Steps in Detail: From Idea to Your First Day of Trading

Step 1: Check the eligibility conditions

General conditions applicable across all three Regions:

• Be of legal age (18) or an emancipated minor
• Have legal capacity (not be under judicial administration)
• Not be barred from running a commercial activity (for example following bankruptcy with a court-ordered ban)
• Have a home or registered office in Belgium

Region-specific conditions — an important difference:

Basic management knowledge, once required everywhere in Belgium, has been progressively scrapped:

In Wallonia, basic management knowledge can be proven by:

• A higher education diploma
• A secondary education diploma (certain streams)
• A basic management knowledge certificate issued by a central jury or training centre
• Three years of practical experience as a business manager within the last 15 years
• A helping spouse, employee or director holding the required knowledge can also be designated

Regulated professions: Some activities require specific professional access, whatever the Region:

• Construction: general contractor, electrician, plumber, tiler, etc.
• Food: restaurateur, butcher, baker
• Personal care: optician, hearing-aid audiologist, beautician
• Transport: freight carrier, taxi driver
• Intellectual professions: accountant (ITAA), architect (Ordre des architectes), estate agent (IPI)

The full list is available on the FPS Economy website (economie.fgov.be).

Step 2: Register through an accredited enterprise counter

The enterprise counter (guichet d'entreprise) is your first official point of contact. There are six counters accredited by FPS Economy:

• Acerta — strong national presence, full ecosystem
• Xerius — highly digitalised, includes a starter kit
• Liantis — more than 60 offices, personalised support
• UCM — French-speaking specialist, strong presence in Wallonia and Brussels
• Partena Professional — HR and social secretariat expertise
• Securex — combined enterprise counter and social secretariat

Documents to bring:

• Valid Belgian ID card or residence permit
• Diploma or basic management knowledge certificate (Wallonia only)
• Proof of professional access (for regulated activities)
• Lease agreement or proof of registered address (evidence of your registered office address)
• Bank account number (recommended but not strictly required at this stage)

Cost: around EUR 97.50 (a regulated fee, indexed annually)

Outcome: you immediately receive your CBE company number (Crossroads Bank for Enterprises, Banque-Carrefour des Entreprises / BCE), in the format 0XXX.XXX.XXX. This number is your unique identifier as a business in Belgium.

What does the enterprise counter actually do?

• Checks that you meet the legal conditions
• Registers you with the CBE
• Assigns your NACE-BEL codes (activity classification)
• Registers your business unit(s) (the address(es) where you trade)

Step 3: Activate your VAT number

VAT activation is usually handled through the same enterprise counter or directly with the relevant VAT control office of FPS Finance.

Choosing your VAT scheme:

The VAT exemption scheme (small business scheme):

This scheme, set out in Article 56bis of the VAT Code, is particularly attractive for starters:

• You do not charge VAT to your customers (an advantage if your customers are private individuals)
• You cannot reclaim VAT on your purchases
• Your invoices must state: "Small business subject to the VAT exemption scheme – VAT not applicable"
• If your turnover exceeds EUR 25,000 during the year, you automatically move to the standard scheme

Activation cost: around EUR 72 through the enterprise counter

Step 4: Join a social insurance fund

Joining a social insurance fund (caisse d'assurances sociales) is mandatory for every self-employed worker in Belgium (law of 30 December 1992). You must join before starting your activity, or at the latest on the day you start.

The main social insurance funds:

• Acerta Social Insurance Fund
• Xerius Social Insurance Fund
• UCM Social Insurance Fund
• Liantis Social Insurance Fund
• Partena Social Insurance Fund
• Securex Integrity
• National Auxiliary Fund (CNASTI) — the public fund

Detailed social contributions (2026):

How the adjustment mechanism works:

This is a crucial point many starters underestimate:

1. For the first three years, your contributions are provisional, calculated on a minimum flat-rate income
2. After two to three years, FPS Finance passes your actual income to the NISSE (National Institute for the Social Security of the Self-Employed, INASTI)
3. Your social insurance fund then adjusts your contributions: if your actual income was higher than the flat rate, you will owe a top-up (sometimes several thousand euros)
4. If your income was lower, you will be partly refunded

Practical advice: from your very first year, set aside 25 to 30% of your net income to cover social contributions and taxes. The adjustment can be painful if you have not planned for it.

Step 5: Open a business bank account

Is a separate business account mandatory?

Strictly speaking, the law does not require sole traders to open a separate business account. However, it is strongly recommended, for several reasons:

• Bookkeeping clarity: separating private and business cash flows makes your accounting far easier
• Tax audits: a mixed account complicates matters during an FPS Finance audit and can raise suspicion
• Professionalism: your customers and suppliers see an account in the name of your business
• Business credit: the bank can assess your activity based on the account's cash flows

Banking options for the self-employed:

Ongoing Obligations: What You Must Do Throughout the Year

Bookkeeping

Sole traders benefit from simplified bookkeeping (Articles III.82 to III.90 of the Code of Economic Law), provided annual turnover excluding VAT does not exceed EUR 500,000.

In practice, simplified bookkeeping means keeping:

• A purchase journal: every purchase invoice, with date, supplier, amount excluding VAT, VAT, and total including VAT
• A sales journal: every sales invoice, with date, customer, amount excluding VAT, VAT, and total including VAT
• A financial journal: every movement on the bank account and cash register
• An annual inventory: a list of stock, receivables and debts as at 31 December

Keeping records: you must keep all supporting documents (invoices, receipts, bank statements, contracts) for seven years (ten years for documents relating to real estate).

Should you hire an accountant?

It is not a legal requirement for a sole trader, but it is strongly recommended once your activity reaches a certain volume:

• An accountant costs between EUR 100 and 300/month depending on complexity
• They save you time and, above all, help you avoid costly mistakes
• They optimise your tax return (deductible expenses, depreciation, etc.)
• Their expertise is invaluable in the event of an audit

VAT returns

VAT return deadlines:

• Monthly return: the 20th of the following month
• Quarterly return: the 20th of the month after the quarter
• December advance payment: 24 December (under the quarterly scheme)

Tax: personal income tax in detail

As a sole trader, your professional income is subject to personal income tax (IPP). Your self-employed income is added to your other income (salary, property income, etc.) and taxed at the progressive rate.

2026 personal income tax brackets:

On top of this come municipal surcharges (local tax), which range from 0% (in some municipalities around Brussels) to 9% depending on the municipality. The national average is around 7%.

Professional expenses: flat rate or actual costs?

You can choose between:

1. The statutory flat-rate allowance: FPS Finance automatically applies a flat percentage of your gross income (around 30%, capped at roughly EUR 5,520 in 2026)

2. Actual expenses: you deduct the professional expenses you actually incurred and can justify. This is often more advantageous if your expenses exceed the flat rate. Examples of deductible expenses:

   • Office rent (or a share of it for mixed home use)
   • IT equipment and software
   • Vehicle expenses (based on CO2 rate and the share of business use)
   • Phone and internet (business share)
   • Professional insurance
   • Social contributions
   • Training costs
   • Office supplies
   • Restaurant costs (69% deductible) and entertaining costs (50% deductible)
   • Specific professional clothing

Advance tax payments: do not forget them!

The advance tax payment (versements anticipés) system is managed by the "Advance Payments" department of FPS Finance. If you do not make sufficient advance payments, you will face a tax surcharge.

2026 advance payment calendar (2027 tax year):

Account for advance payments: BE61 6792 0022 9117 (FPS Finance – Advance Payments Department), quoting your national number as the structured reference.

Tip: the surcharge for insufficient advance payments is around 9% of the tax due. Making advance payments is therefore a form of "investment" with a guaranteed return of 4.5 to 9%!

Insurance: protect yourself properly

A self-employed person's statutory pension is significantly lower than an employee's. In 2026, the minimum pension for a self-employed person with a full career (45 years) is around EUR 1,740/month for a single person. Building supplementary cover is therefore essential.

The PLCI (supplementary pension for the self-employed) is an absolute must. Every euro paid in is 100% deductible from your professional income, and the maximum premium in 2026 is EUR 3,966.04 (standard PLCI) or EUR 4,562.43 (social PLCI, which also covers incapacity for work and hospitalisation). It is the most effective pension-planning tool for a self-employed person.

Self-Employed as a Secondary Activity

If you are an employee, civil servant, teacher or pensioner, you can run a self-employed activity as a secondary occupation. It is an excellent way to test a business idea while keeping the security of your job.

Conditions for secondary-activity status:

• Be employed at least 50% of full-time hours (or a civil servant working at least 200 days or eight months a year)
• Or be a pensioner (specific conditions apply)

Advantages:

• Reduced social contributions: around EUR 92/quarter if your net annual income is below EUR 1,865
• You keep your employee social cover
• No impact on child benefit

Warning: above EUR 1,865 of net annual income, contributions rise proportionately (20.50% of net income).

Student Entrepreneur Status

Since 2017, students aged 18 to 25 can benefit from a specific status with reduced social contributions:

• Net income < EUR 8,430/year: reduced contribution of around EUR 92/quarter
• Net income between EUR 8,430 and EUR 16,861: reduced proportional contributions
• Net income > EUR 16,861: standard main-activity self-employed contributions

Students remain dependent on their parents if their gross income does not exceed EUR 7,290 (Brussels/Wallonia) or EUR 7,290 (Flanders) in 2026.

The Bridging Right: Your Safety Net

If your activity does not work out, the bridging right (droit passerelle, law of 22 December 2016) offers protection in the event of a forced shutdown:

• Monthly allowance: around EUR 1,550/month (single) or EUR 1,935/month (with dependants) for a maximum of 12 months
• Continued social rights (health insurance, child benefit) for a maximum of four quarters
• Conditions: at least four quarters of contributions, and an involuntary or economically driven shutdown

Pitfalls to Avoid: Common Starter Mistakes

Even experienced sole traders slip up. Watch out for these mistakes:

1. Forgetting advance payments: the roughly 9% surcharge is automatic and non-negotiable. Set a reminder for 10 April, 10 July, 10 October and 20 December.

2. Not separating bank accounts: mixing private and business finances is a bookkeeping nightmare and a red flag during a tax audit.

3. Underestimating social contributions: the adjustment after two to three years can amount to several thousand euros. Provision for it from the start.

4. Neglecting supplementary pension cover: a self-employed person's statutory pension is around EUR 1,740/month (full career). Without a PLCI or other supplementary savings, retirement will be difficult.

5. Working without a written contract: even between friends or acquaintances, always put your agreements in writing. In the event of a dispute, a contract is your best protection.

6. Not insuring yourself properly: an illness or accident without guaranteed income insurance can be disastrous. Compulsory health insurance only covers a minimal benefit after a month of incapacity.

7. Ignoring VAT obligations: a late VAT return triggers a EUR 100 fine per return and per month of delay. Three late returns in a year can force you onto the monthly return scheme.

8. Invoicing without an active VAT number: only invoice once you have received confirmation that your VAT number is active. Invoicing beforehand is an offence.

Grants and Support for Starters

In Wallonia

• Business vouchers (chèques-entreprises): funding of 75 to 90% of the cost of professional support (accountant, consultant, coach)
• Prêt Coup de Pouce: a subordinated loan from private individuals to Walloon SMEs, with a tax advantage for the lender (4% tax credit)
• SOWALFIN: public guarantees to ease access to bank credit
• 1890.be: a free information and guidance service for Walloon entrepreneurs

In Brussels

• hub.brussels: free support, coaching and networking
• finance.brussels: subordinated loans and equity stakes
• Energy and Renovation grants: for investment in your business premises
• Brusoc: microcredit for entrepreneurs who struggle to access traditional bank credit

In Flanders

• VLAIO (Agentschap Innoveren & Ondernemen): innovation grants, SME bonuses, free advice
• PMV (ParticipatieMaatschappij Vlaanderen): subordinated Startlening loans (max EUR 100,000 at a reduced rate)
• Winwinlening: the Flemish equivalent of the Walloon Prêt Coup de Pouce

Conclusion

Becoming a sole trader is the ideal springboard for launching a business in Belgium. Simple, fast and inexpensive (under EUR 200 to start), this status lets you test your activity with minimal paperwork. The key to success lies in solid financial preparation (setting money aside for contributions and taxes), rigorous bookkeeping, and adequate social protection (PLCI, guaranteed income). Once your activity takes off and your income passes the EUR 40,000–50,000 threshold, it will be time to consider moving to a company to optimise your taxation.