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Sole trader: starting and running your business in Belgium

No capital, no notarial deed, one registration and you can invoice. The sole proprietorship remains the fastest way to start in Belgium. Here is what it really involves and what you need to keep up every month.

What a sole proprietorship is

A sole proprietorship is you. There is no separate legal person: your business and yourself are the same entity, legally and fiscally. Your profit is your income, taxed under personal income tax.

It is the form chosen by the vast majority of Belgian self-employed people starting on their own: consultants, craftspeople, retailers, liberal professions, food trades.

  • No start-up capital to pay in, no financial plan to file.
  • No notarial deed, so very low setup costs.
  • No annual accounts to publish with the National Bank.
  • A single tax return: yours.

Simplicity does not mean an absence of obligations. VAT, social contributions and record keeping apply exactly as they do anywhere else.

The steps to set it up

The path has five steps and is often completed within a few days.

  • Open a bank account dedicated to the business, separate from your private account.
  • Register with the Crossroads Bank for Enterprises through a business counter, which assigns your company number and records your activities.
  • Have your VAT number activated at the same counter or with the FPS Finance, unless you apply for the exemption.
  • Join a social insurance fund for the self-employed, no later than the day you start.
  • Inform your health insurance fund and take out the insurance your trade requires, including professional liability.

Some regulated activities still require an authorisation, professional access or a specific licence. The business counter will tell you at registration.

Liability and protecting your assets

This is the real trade-off for the simplicity: your private and business assets are one and the same. A business creditor can therefore, in principle, go after your own property.

Two protections exist and are worth knowing about before the problem arrives.

  • The declaration of unseizability of the family home, made before a notary. It puts your main residence out of reach of business creditors for debts arising after the declaration.
  • A professional liability insurance suited to your activity, covering damage caused to clients or third parties.

The declaration of unseizability only covers business debts arising after it is registered. It is done at the start, not when trouble is already there.

Simplified bookkeeping

A sole proprietorship whose annual turnover excluding VAT does not exceed 500,000 € may keep simplified accounts. Above that, double entry bookkeeping becomes mandatory.

Simplified bookkeeping rests on three books and an inventory, kept continuously and without blanks.

  • The purchase book, listing every invoice received along with its supporting documents.
  • The sales book, listing every invoice issued, paid or not.
  • The financial book, listing the movements on your bank accounts and in your cash register.
  • The annual inventory of your stock, receivables and debts, drawn up at least once a year.

All supporting documents are kept for seven years. A legible and complete digital copy is enough, which makes photographing a receipt the same day far more reliable than the shoebox.

The calendar of obligations

Four appointments set the rhythm of a sole trader's year. Keeping them avoids most fines and unpleasant surprises.

The deadlines of the year

Obligation Deadline
Quarterly VAT return and payment The 25th of the month following the quarter
Monthly VAT return and payment The 20th of the following month
Provisional social contributions Every quarter, with your social insurance fund
Annual client listing 31 March at the latest
Advance tax payments Four quarterly deadlines
Personal income tax return According to the annual FPS Finance calendar

Since 1 January 2026, electronic invoicing is mandatory between Belgian VAT registered businesses. A PDF sent by email is no longer enough: the invoice has to travel in a structured format over the Peppol network.

Sole trader or company?

The question comes up when profit rises. As a natural person you are taxed at the progressive rates of personal income tax, reaching 50 % in the top bracket, plus municipal surcharges. A company falls under corporate tax, with a reduced rate on the first profit bracket under certain conditions.

The calculation is not only about the rate though. A company means a financial plan, annual accounts to file, setup costs and a higher yearly accounting bill.

The rule of thumb often used is a stable annual profit clearly above what you need to live on. As long as you consume all your profit, a company mainly adds complexity.

Have your accountant model both scenarios on your real figures over three years. The switch is decided on a trend, not on one good year.

Novadesko for a sole trader

The three books to keep, the VAT to prepare and the documents to store for seven years: that is precisely what Novadesko automates.

  • Your purchase, sales and financial books fill up as your invoices and bank movements come in.
  • Your purchase invoices are photographed, read automatically and sorted by expense category.
  • VAT is calculated line by line at the right rate, with the mandatory legal mentions.
  • Peppol electronic invoicing is built in and operational.
  • The quarter's VAT balance stays visible, well before the deadline.
  • The accounting export your accountant expects is ready in one click, which often brings their bill down.

Frequently asked questions

How much does it cost to set up a sole proprietorship?

Costs are limited to the registration fee at the business counter, the activation of the VAT number and your first quarterly social contribution. There is no capital to pay in and no notary fees.

Do I need a business bank account?

The law requires an account separate from your private one for the business. That account has to be communicated and shown on your commercial documents.

Can I hire staff as a sole trader?

Yes, nothing prevents it. You then register as an employer with the NSSO and work with a payroll agency.

What happens to my sole proprietorship if I move to a company?

You can either cease it or contribute the business to the new company. That contribution has tax consequences, notably on capital gains, which you prepare with your accountant.

Does simplified bookkeeping remove the need for an accountant?

It makes day to day upkeep manageable, especially with software. Most self-employed people still keep an accountant for the annual return and the judgement calls, which costs less when the books are already clean.

The thresholds, ceilings and amounts on this page are indexed every year. Check them with your social insurance fund, with the FPS Finance or with your accountant before you decide.

Your books up to date, without giving up your evenings

Purchase book, sales book, financial book and VAT keep themselves while you work. Your accountant receives a clean file.

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