Starting a business
Steps to starting a business
Choosing the legal status: sole proprietorship (self-employed individual) or company (legal entity)
If the company has its registered office in Brussels or the Walloon region: proof of basic management skills must be provided.
Open a bank account specific to your business
Register your company with the Crossroads Bank for Enterprises to receive a company number
Determine your VAT tax regime
Activate your VAT number
To join a social insurance fund for the company
Joining a social insurance fund for self-employed workers
Joining a mutual insurance company
If hiring staff: register with the National Social Security Office (ONSS).
Other administrative obligations: EORI, AFSCA, ...

Source of the information sheet: https://www.notaire.be/
Tax and legal obligations
Keeping accounts
Issuing invoices
File periodic VAT returns and pay VAT
Submit a "customer list" to the VAT authorities.
File an intra-community VAT return
Declare and pay the withholding tax, and submit tax forms.
Declare and pay the withholding tax on movable property
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