🇧🇪 Belgium
🏠 Buying or renting
Annual tax
Updated 2026
Belgian property tax 2026: how it is calculated and how to reduce it
This is the ownership cost you discover after buying. Every year the bill goes up without you doing anything — not because your municipality raised its taxes, but because a federal coefficient is applied automatically. In 2026 it moves to 2.3. Here is the full calculation, Region by Region, and the reductions many owners never claim.
📖 8 min read
🕐 Updated August 2026
🇧🇪 All 3 Regions
Belgian property tax — précompte immobilier / onroerende voorheffing — is an annual regional tax on immovable property, owed by the holder of a real right on 1 January: the owner, but also a usufructuary, long-lease holder or holder of a right of superficies. Unlike registration duty, paid once on purchase, this one comes back every year, forever.
Its peculiarity: it is not calculated on the value of your property, nor on the rent you collect, but on a cadastral income established from 1975 rental values. Hence an indexation system that makes all the difference.
🧮 The full calculation
Indexed CI = non-indexed cadastral income × 2.3 (2026 coefficient)
Base tax = indexed CI × regional rate
Total tax = base × (1 + municipal surcharges + provincial surcharges)
The three layers do not carry anything like the same weight, and that is what surprises:
📈
Layer 1 — federal indexation: 2.3 in 2026
FPS Finance sets the coefficient that updates 1975 cadastral incomes each year. It moves from 2.2446 in 2025 to 2.3 in 2026, around +2.5%. That is why almost every Belgian owner will pay more in 2026, even with no local change.
🏛️
Layer 2 — the regional rate
1.25% in the Brussels Region and in Wallonia, 3.97% in Flanders. The Flemish rate looks three times higher, but surcharges there are structured differently: you cannot compare the Regions on that single figure.
🏘️
Layer 3 — local surcharges: the real weight
Municipality and province apply their own surcharges. In practice they make up the bulk of your bill: the regional share is often only a small fraction of the total. Two houses with identical cadastral income in neighbouring municipalities can face very different assessments.
💡 Why your 2026 bill rises without anyone voting on it
Indexation to 2.3 alone pushes the tax up by about 2.5% for everyone. On top of that come the 2026 surcharge increases decided by some municipalities — around twenty in Wallonia and a handful in Brussels. To work out which of the two causes affects you, compare the "surcharges" line on your assessment notice with last year's.
Cadastral income: where that figure comes from
Cadastral income (CI) is supposed to represent the average annual net rental income the property would have produced on 1 January 1975. That base has never been generally revised: only the indexation coefficient catches up with it, very imperfectly.
The practical consequence: CI no longer reflects the market. A recent flat in a sought-after Brussels district can carry a higher CI than a large old house in the provinces, even though their market values are comparable. That is the main criticism of the system — and the reason a general revision keeps returning to the political debate.
⚠️ Renovations can have your CI revised. An extension, a converted attic, an extra bathroom or turning a garage into living space must be declared to the Measurements and Valuations administration within 30 days of occupation. A revised CI raises the tax for every subsequent year — and failing to declare can trigger a retroactive reassessment.
You can look up your property's cadastral income via MyMinfin, under "My home". It also appears on the property tax assessment notice and in the purchase deed.
What changes by Region
🏙️ Brussels
1.25%
Regional rate applied to the indexed CI, then municipal surcharges (each of the 19 municipalities sets its own) and the agglomeration.
The BE HOME premium is deducted automatically from the tax of owners who live in their Brussels home. It replaces the former own-home reduction and is set to rise in the coming years.
🌳 Wallonia
1.25%
Regional rate, then municipal and provincial surcharges — Wallonia is the only Region where the province adds its own layer.
Cumulative reductions: 25% for a modest dwelling (50% for the first 5 years on new build), €125 per child from two dependent children, €250 per dependent person with a disability.
🌾 Flanders
3.97%
Base levy of 3.97% on the indexed CI, then municipal and provincial surcharges.
Reductions for a modest dwelling, dependent children, disability and — a Flemish specificity — for energy-efficient homes. Amounts are indexed annually and can be simulated on the Flemish Tax Service website.
If you are comparing two properties in two Regions, do not stop at the regional rate: what counts is rate × surcharges, and that has to be simulated municipality by municipality. Our pages on the Brussels, Walloon and Flemish property markets place this cost in the overall budget.
Reductions: the money nobody claims
If you rent the property out, the way it is taxed changes: see renting out and landlord taxation.
This is the most profitable point on this page. Reductions are not all automatic, and one that is not claimed is never granted of its own accord.
1
Modest dwelling (Wallonia) — 25%, sometimes 50%
Condition: the non-indexed cadastral income of all your property in Belgium does not exceed €745, and you personally occupy the home as your sole residence. The rate rises to 50% for the first five years if you built or bought new without receiving a regional purchase or construction grant.
2
Dependent children and persons (Wallonia)
€125 per child, from two dependent children. €62.50 per child in shared custody (€125 for a child with a disability in shared custody). €250 for a dependent recognised as at least 66% disabled, and €125 per other dependent up to the 2nd degree.
3
Disability or serious war invalid
A separate reduction exists for the holder themselves, recognised as a serious invalid or at least 66% disabled before the age of 65.
4
BE HOME premium (Brussels)
Reserved for a holder of a real right who is registered as living in the property. It is normally deducted automatically from the assessment notice. If it is missing, you can claim it via MyTax within 193 days of receiving the notice.
5
Unproductivity
A property left empty and unproductive against your will for at least 90 days in the year (damage, expropriation, imposed works, sale impossible despite efforts): a remission or reduction is possible. Conditions are strict and differ by Region.
✅ The annual reflex. When your assessment notice arrives, check three lines: the cadastral income (has it changed?), the surcharges (did your municipality vote an increase?) and whether the reductions you are entitled to have actually been applied. In Wallonia, the claim goes to SPW Finances from January and up to six months after receiving the notice.
Landlords: the calculation changes
If you rent out, two things shift.
The tax stays with you. Under a residential lease, passing it on to the tenant is prohibited in all three Regions. It is a holding cost to build into your net yield — our rental yield calculator factors it in.
Income tax treatment differs too. For a home rented to a private individual who occupies it privately, you are taxed on the indexed CI increased by 40%, not on actual rent. If you rent to a company or to a tenant using the property for professional purposes, actual rent becomes the taxable base — a difference that can prove costly with a poorly drafted lease. Our pages on investing differently and tenant rights complete the picture.
Challenging it: when it is worth the effort
Two different appeals exist, and they are often confused.
📄 Objection to the assessment
With the regional administration
•
You challenge the calculation, a missing reduction, or the fact that you no longer hold the property.
•
Deadline: running from receipt of the assessment notice. Do not let it lapse — out of time, the objection is inadmissible even if you are right on the merits.
•
In writing, with reasons, to SPW Finances, Brussels Fiscality or the Flemish Tax Service depending on the Region.
🏗️ Objection to the cadastral income
With FPS Finance
•
You challenge the CI itself, considering it out of proportion with comparable properties.
•
This goes to the federal administration (Measurements and Valuations), not to the Region.
•
The deadline runs from notification of the CI. Once it expires, the CI becomes final until the next revision.
The costliest pitfalls
📅
Buying mid-year
The taxpayer is whoever holds the real right on 1 January. Buy in June and the seller receives the notice for the whole year. In practice the deed almost always provides for a pro rata temporis split — check that the clause is actually there, it is not automatic.
🧱
Renovating without declaring
Works that increase the comfort of the home must be declared within 30 days. A later check — often triggered by an energy grant application or a permit — can lead to a retroactive CI revision.
👨👩👧
Not reporting a birth or a move
The dependent-children reduction follows the household composition on 1 January. A second child born in December opens the right from the following tax year — but the administration has to know about it.
💳
Not planning the cash flow
The tax falls in one go, often when the budget is already stretched. An automatic monthly transfer to a dedicated account solves it without thinking — the same logic as in saving for a property purchase.
🕐 Last verified: August 2026 — The 2026 indexation coefficient (2.3) confirmed by FPS Finance; Walloon reductions taken from the official amounts published by the Walloon Region. Surcharges are voted municipality by municipality: always simulate with your own.