Becoming a Sole Trader in Belgium: The 2026 Guide

Sole trader or company?

In Belgium, a sole trader works as a natural person, without creating a company. Your business and your private assets remain legally the same. As a result, you answer for business debts with your own property. Many freelancers still choose this route, because it costs less to set up and run.

This guide covers the sole trader route. If you prefer limited liability, compare it with a private limited company (SRL) first. Our business plan guide helps you test both options.

Who can become a sole trader?

The law sets a few basic conditions.

• You are at least 18, unless you are an emancipated minor.
• You enjoy your civil rights.
• No court has banned you from trading.
• You hold professional access if your activity requires it.

Some professions remain regulated: accountants, architects, estate agents and healthcare professions. For them, a diploma and registration with a professional body become essential. The basic management knowledge certificate disappeared in Flanders in 2018. Elsewhere, ask your enterprise counter whether proof still applies.

Step 1: put numbers on your project

Before you register, build a financial plan. It estimates turnover, costs, contributions and tax. So you know from day one what price to charge. A sole trader without a plan often underprices the work.

Open a business bank account as well. The law does not require one for a natural person, but it keeps your accounts clean.

Step 2: register with the CBE

You register with the Crossroads Bank for Enterprises (CBE) through an approved enterprise counter. The counter checks your conditions and gives you an enterprise number. That number then appears on your invoices, website and letters. Registration comes with a fee, and the counter tells you the current rate.

You also pick your activity codes (NACEBEL). Choose them carefully, since they officially describe what you do. The FPS Economy lists the approved enterprise counters. Every sole trader needs this registration before the first invoice.

Step 3: join a social insurance fund

Join a social insurance fund no later than the day you start trading. This membership opens your rights: pension, healthcare, incapacity benefits and the bridging right if you have to stop.

The fund collects your contributions every quarter. The rate stands at about 20.5% of net income, with a quarterly minimum for a main activity. Our guide to social contributions explains the calculation. Also register with a health insurance fund (mutualité) for healthcare refunds. As a sole trader, you pay these contributions personally.

Step 4: VAT

Your counter can activate your VAT number during registration. Above €25,000 of annual turnover, you charge VAT. Below it, the small business exemption remains available. However, the exemption stops you from deducting VAT on purchases. A sole trader with large business costs may therefore prefer the normal VAT scheme. Read our article on VAT activation before you choose.

Step 5: insurance

Working alone means carrying certain risks yourself.

• Professional liability insurance covers damage you cause to clients.
• Income protection insurance tops up incapacity benefits, which often stay low.
• A supplementary pension (PLCI/VAPZ) builds savings with a tax advantage.

Our guide to professional insurance compares the options. A sole trader who skips cover puts personal assets at risk, since no company shields them.

Tax for a sole trader

Your profits fall under personal income tax. The progressive rates run from 25% to 50%, plus the municipal surcharge. Social contributions you pay remain deductible as business expenses.

You also pay tax through advance payments. For a first business start, no surcharge applies during the first three years. Still, paying early stays wise, because it avoids a heavy tax bill in year two or three.

Example: Karim, web developer

Karim plans to start as a sole trader in March. In February, he builds his financial plan and sets his day rate. Then he registers through a counter and joins a social insurance fund the same day. He aims for €60,000 in turnover, so he activates VAT straight away. Finally, he takes out professional liability insurance before his first assignment.

Every month, Karim sets aside part of his receipts for contributions and tax. Thus the fund's adjustment two years later does not catch him out.

Starting alongside a job

Do you work at least half-time as an employee? You can then start as a sole trader in a secondary occupation. Your job already covers your social rights, and your contributions stay lower. Our guide to the secondary occupation explains this status.

Mistakes to avoid

• Starting an assignment before joining a fund.
• Setting a price without counting contributions, tax and holidays.
• Forgetting health insurance or business cover.
• Spending the VAT you collect, although it belongs to the State.
• Leaving the bookkeeping until year end.

Conclusion

Becoming a sole trader takes method more than courage. Plan the numbers, register with the CBE, join a fund, sort out VAT and take out insurance. With Juristelo, build the financial plan that gives your sole trader business a solid base.