Domicile your company in Brussels with a prestigious address. Full domiciliation services, company formation and administrative management in Belgium.
Choose your domiciliation address from our prestigious centres. Legal and commercial domiciliation in Overijse, Bruxelles, Kraainem with full services included.
Chaussée de Bruxelles 292, 3090 Overijse
Our Overijse centre offers a professional environment in a peaceful setting at the gates of Brussels.
Boulevard de l'empereur 10, 1000 Bruxelles
Located in the heart of Brussels, steps from Central Station, our centre offers prestige and optimal accessibility.
Chaussée de malines 455, 1950 Kraainem
In a modern and verdant setting, our Kraainem centre combines tranquillity with proximity to the Brussels ring road.
With your first domiciliation at MonSiegeSocial, get YouInv free of charge — the complete invoicing solution to manage your business like a professional.
Invoicing solution
First year included
We guide you through every step of setting up your company in Belgium: SRL, SA, ASBL or sole trader. A complete service to get you started with peace of mind.
Complete formation of your company with all required legal documents.
Personalised guidance from A to Z for your entrepreneurial project.
The Entrepreneurship Hub
the key to your success
Your company formed in 5 to 10 working days
Fixed rates, no surprises or hidden fees
Over 8 years of experience in company formation
Domiciliation included • Dedicated support • YouInv free for 1 year
Our mobile applications allow you to manage your domiciliation, check your mail and track your administrative procedures wherever you are.
View and manage your mail in real time. Instant notifications for important documents.
Track the status of your procedures, legal documents and important deadlines.
Automatic alerts for urgent mail, tax deadlines and legal obligations.
Manage multiple registered companies from a single application.
New mail
Invoice received
Reminder
VAT return
Whether you are a company founder, self-employed or running an SME, we guide you through every step of your project.
Prestigious legal and commercial address in Brussels. Professional mail management, legal compliance, digital services included.
Domicile my companyFull support to create your SRL, SA, ASBL or sole trader in Belgium. Articles, CBE, VAT, expert advice.
Start my companyWe are not just a domiciliation service, we are a full business centre offering 360° solutions.
A team of experts in law, accountancy and business management at your service.
Join a dynamic entrepreneur network and take part in exclusive events.
Quick responses and personalised support for every client.
Hundreds of entrepreneurs have trusted us for years.
Discover why over 2,000 entrepreneurs trust us for their company domiciliation and business support.
“The Monsiegesocial offices in Kraainem are ideal for meetings with my team.”
Stéphane BROCHU
Manager, Sigma. E BV
“Monsiegesocial allows us to focus on our core business. Their service is responsive and professional.”
Céline VIVIER
President of Operation Thermos ASBL
“Fast mail notifications, by email or SMS, everything works perfectly.”
Alain DEKLEERMAEKER
Manager, Concept' house and Batilook
Average client rating
Satisfied clients
Companies supported
Recognised expertise
More than 2000 entrepreneurs have already chosen Monsiegesocial for their company domiciliation. Benefit from our expertise and personalised support.
No commitment • Personalised support • Dedicated support
Answers to the most frequently asked questions about company domiciliation in Brussels and our services.
Company domiciliation means using a commercial address as your registered office without being physically present there. In Brussels, this allows you to have a prestigious address for your company with all the associated services.
Brussels offers many advantages: capital of Europe, prestigious image, favourable taxation, international accessibility. Our Brussels domiciliation service gives you access to all these benefits.
Our services include: legal and commercial address, mail management, notifications via mobile app, meeting room, administrative assistance, and much more depending on your plan.
Yes, you can domicile several companies at the same address. Our mobile application makes it easy to manage multiple companies from a single account.
We receive your mail, scan it and forward it to you via our mobile application. You receive real-time notifications for important documents.
Our Brussels domiciliation rates start from 50€/month. Contact us for a personalised quote based on your specific needs.
YouInv is a complete invoicing and business management solution (value €600 excl. VAT/year) offered free for 1 year with your first domiciliation. It includes unlimited invoicing, a CRM, dashboards and support. No hidden fees, automatic activation.
For over 10 years, we have been supporting entrepreneurs with their company domiciliation in Brussels and Belgium.
Setting up a holding company in Belgium lets you optimise dividend taxation through the DBI regime and structure your assets. Complete guide for entrepreneurs.
CSRD transposed into Belgian law in December 2024: which companies must comply, the revised timeline after Stop-the-Clock and what Omnibus I changes for SMEs.
Administrator mandate in a Belgian SRL: appointment, management and representation powers, remuneration, liability and removal. Complete guide 2026.
Advance tax payments in Belgium 2026: the surcharge is abolished for self-employed individuals. Companies (6.75%) and directors (4.50%): dates, calculation and exemptions.
Contribution in kind in a Belgian SRL: eligible assets, mandatory statutory auditor report (art. 5:7 CSA), notarial formalities and the real estate case. Full guide.
Cross-border company mobility in Belgium: the law of 25 May 2023 covers cross-border transformations, mergers and divisions under the CSA. Procedure, notary role and shareholder rights.
We apply rigorous anti-money laundering verification procedures to guarantee legal compliance and protect our business ecosystem. No domiciliation without full validation.
In-depth verification of the identity of directors, beneficial owners and politically exposed persons (PEP).
Detailed assessment of the planned activity, funding sources and coherence of the business project.
Permanent monitoring of registered companies to detect any suspicious activity or changes in risk profile.
Mandatory steps before domiciliation
Verification time: 3-5 business days
Experts in AML compliance and Belgian and European regulation
Protection of your company and our ecosystem
Strict adherence to legal and regulatory obligations
As an approved domiciliation centre, we are legally required to verify the identity of our clients and the legitimacy of their activities. These checks protect your company and guarantee a healthy and secure business environment.
Our experts are available to answer all your questions and guide you through your procedures.
