A Walloon landlord pays the property tax (precompte immobilier), the EPC and, where needed, the electrical compliance certificate and rental permit, plus building insurance, the syndic fee, maintenance, any letting or management fees, and income tax on the property. Lease registration for a main residence is free.
Rental income is gross, not net, and the difference is a set of recurring owner costs. The largest fixed charge is usually the property tax (precompte immobilier), an annual regional tax based on the indexed cadastral income that the landlord must bear and can never pass to a main-residence tenant (droitsquotidiens.be, 2026). Budgeting for it is essential when assessing a property’s real yield.
Then come the letting prerequisites. Before renting, the owner needs a valid EPC (PEB) and, for older installations, an electrical compliance certificate (CE); some properties, notably small units under 28 square metres and collective student housing, also require a rental permit (droitsquotidiens.be, 2026). One welcome saving: registering a main-residence lease is free and is the landlord’s own legal obligation, so it costs time rather than money (logement.wallonie.be, 2026).
Ongoing costs run through the whole holding period. They include building insurance, the syndic or manager’s fee in a co-ownership, routine maintenance and repairs that are not the tenant’s responsibility, and any agency letting or management fees where the owner delegates the work. Rental income is also taxable: for a private individual letting to a household who does not use the property professionally, Belgian tax is generally assessed on the indexed cadastral income rather than the actual rent, a mechanism worth confirming with a tax adviser for each situation.
The counter-intuitive lesson for new landlords is that the headline rent overstates the return, sometimes substantially. Property tax, insurance, maintenance and periods of rental vacancy can turn an attractive gross yield into a modest net one. This is precisely why the annual-cost questions in silo S09 matter, and why realistic budgeting beats optimistic advertising. Property tax rates and cadastral rules are regional, so Brussels and Flanders figures will differ.
At a glance
- Property tax (precompte immobilier): annual, on indexed cadastral income, landlord only
- EPC (PEB): required and valid before renting
- Electrical compliance certificate (CE): for older installations
- Rental permit: for dwellings under 28 m2 or collective housing
- Lease registration: free for a main residence, landlord’s duty
- Insurance and syndic fee: ongoing owner costs
- Maintenance and repairs: owner’s share, beyond the tenant’s
- Letting or management fees: where delegated to an agency
- Income tax: generally on indexed cadastral income for a private let