Belgian rental law was written for people who move in and stay for years. If you are coming for six months, a year or an open-ended project, the standard options can feel like a poor fit: a nine-year lease you will leave early, or a short-term lease that still expects you to buy a sofa. This guide compares a mid-term rental vs a standard lease in Belgium: how the 3-6-9 lease and the short-term lease work, what the deposit and registration rules are in Brussels and Flanders, where furnished apartments sit in all this, and which option suits which kind of stay.
The short answer
Choose by how long you are staying and how much you want to set up yourself.
Under 12 months, or an end date you do not know yet: a furnished mid-term rental with a fixed contract of 1 to 11 months.
One to three years, and you are happy to furnish a home: a short-term lease.
Three years or more, or you are moving with family for good: a standard nine-year lease.
Housing law is regional in Belgium: Brussels, Flanders (Antwerp, Ghent) and Wallonia each have their own rules. The structure is similar; the details are not.
The standard lease: nine years, known as "3-6-9"
A lease for your main residence in Belgium runs for nine years by default. If the contract says nothing about duration, or states a term between three and nine years, the law treats it as a nine-year lease.
The name 3-6-9 comes from the three-year periods at which the landlord may end the lease on grounds set by law, such as moving in personally, major works, or ending it without a reason against compensation. The tenant has much more freedom:
You can leave at any time with three months' notice.
In the first three years you also pay an indemnity: three months' rent in year one, two in year two, one in year three. After that, notice alone is enough.
For a newcomer staying a year or two, that indemnity is the real cost of choosing the "wrong" lease.
The short-term lease: up to three years
A short-term lease is a main-residence lease of three years or less, in writing. It suits people who know they will stay a defined period, but it has strict rules on renewal and conversion.
Brussels | Flanders (Antwerp, Ghent) | |
|---|---|---|
Maximum total length | 3 years, including renewal | 3 years, including renewal |
Renewal | Once only (leases from 1 November 2024) | Once, on the same conditions |
Ending at the agreed date | Notice at least 3 months before the end | Notice at least 3 months before the end |
If nobody gives notice, or you stay on | Converts to a 9-year lease from the original start date | Converts to a 9-year lease from the original start date |
Tenant leaving early | 3 months' notice plus 1 month's rent | 3 months' notice plus 1.5, 1 or 0.5 months' rent in year 1, 2 or 3 |
The conversion rule catches people out. If you intend to leave at the end of a short-term lease, send notice on time and keep proof, usually by registered letter. Otherwise you may find yourself holding a nine-year lease you never meant to sign.
Deposit rules differ by region
The rental deposit in Belgium is capped by law and cannot simply be handed to the landlord. It is usually placed in a blocked account in the tenant's name, released only with both parties' agreement or a court decision.
Region | Maximum deposit | Main forms allowed |
|---|---|---|
Brussels (leases from 1 November 2024) | 2 months' rent, excluding charges | Blocked account in the tenant's name, bank guarantee, guarantee via the CPAS/OCMW; not in cash |
Flanders (leases from 1 January 2019) | 3 months' rent | Individual account in the tenant's name, bank guarantee, guarantee via the OCMW |
Wallonia | 2 months' rent | Blocked account, bank guarantee or public guarantee |
In Brussels the landlord must release the deposit within two months after the keys are returned. A blocked account usually needs a Belgian bank, which is one of the first obstacles for new arrivals: see our guide to renting without a Belgian bank account.
Registration of the lease
A written residential lease in Belgium must be registered by the landlord within two months of signing, free of charge, through the federal MyRent service. In Brussels, since 1 January 2025, landlords also register leases in a separate regional system; the federal obligation still applies.







