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False self employment in Belgium: What Every IT Consultant Needs to Know

June 2026 5 min read

False self employment is one of the biggest legal risks for Belgian IT consultants. The ONSS can re classify a freelance relationship as a disguised employment, triggering retroactive social contributions, interest and fines for years of past invoices.

What is false self employment?

A worker is considered a false self employed when they invoice as a freelancer but the working relationship has all the characteristics of an employment contract. The label on the contract does not matter, only the reality of the relationship.

The 4 general criteria

  • Will of the parties as expressed in the contract
  • Freedom to organise working time
  • Freedom to organise the work itself
  • Absence of a hierarchical control by the client

If three of the four point towards employment, the ONSS will likely re classify the relationship.

IT specific risk factors

  • Full time presence on the client site for many months
  • Single client representing 100% of revenue
  • Use of client equipment, badge and internal tools only
  • Daily reporting to a client manager
  • Fixed working hours imposed by the client

Does an own company protect you?

No, not absolutely. The ONSS analyses the reality, not the legal form. An SRL with a single client, full time on site for years and supervised daily is still at high risk of re classification.

The consequences

  • Back ONSS contributions on up to 7 years of revenue
  • Default interest of 7% per year
  • Administrative fines
  • Personal director liability if the SRL cannot pay

The safest route

Under BSH umbrella payroll you are an employee. False self employment simply does not apply, because you do not invoice as a self employed person. Zero risk, zero arguments.

How to stay safe if you run your own SRL

  • Diversify your client base across at least 2 to 3 active clients
  • Use your own equipment where possible
  • Document results in writing, not hours present
  • Avoid signing into client tools as a regular employee
This article is for informational purposes only. Consult a certified accountant for personalised fiscal advice.