Belgium Property Tax Calculator 2026 — Onroerende Voorheffing / Précompte Immobilier
Calculate Belgian property tax based on indexed cadastral income (KI/CI) with regional, provincial, and communal additions.
How Onroerende Voorheffing / Précompte Immobilier works in 2026
Onroerende Voorheffing (Dutch) / Précompte Immobilier (French) is an annual tax on immovable property (land and buildings) in Belgium. It is based on the cadastral income (KI/CI — Kadastraal Inkomen / Revenu Cadastral), which is the deemed rental value determined by the government. The KI is indexed annually (roughly 2–4% per year) and a regional rate of 2.54% is applied. Provinces and municipalities add their own surcharges as a percentage of the regional tax, typically ranging from 200–400% and 500–2500% respectively. For main residences in Flanders, a 70% reduction on the regional portion applies.
Belgium Property Tax Calculator 2026 — Onroerende Voorheffing / Précompte Immobilier
Calculate Belgian property tax based on indexed cadastral income (KI/CI) with regional, provincial, and communal additions.
Typical provincial: 200–400%, communal: 500–2500%
Tax Breakdown
Comparison Across Regions
Understanding your results
Indexed Cadastral Income: The KI/CI value after annual indexing. If your value is not yet indexed, the calculator applies a 3% increase. Regional Tax (2.54%): The base tax calculated on the indexed KI. Provincial Addition: A surcharge set by the province, expressed as a percentage of the regional tax. Communal Addition: A surcharge set by the municipality. Main Residence Reduction (Flanders only): A 70% reduction on the regional tax portion for your primary home.
Regional differences
Flanders (Vlaanderen): Provincial additions typically 200–400%, communal additions 500–2500%. Main residence reduction of 70% on the regional portion is available. Wallonia (Wallonie): Provincial additions typically 200–400%, communal additions 600–2500%. Brussels (Brussel): No provincial level, so no provincial addition. Communal additions typically 500–2500%.
Finding your Cadastral Income
Your cadastral income (KI/CI) is listed on your property tax bill (aanslagbiljet / avertissement-extrait de rôle) or can be found in your property deed. It is also available via the MyMinfin portal. As a rough estimate, the KI is typically around 60% of the annual market rent of the property.