Walloon Registration Tax: Full Official Scale and Category-by-Category Rates
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Cartax.be Tax Intelligence Team
Évolution Législative
January 2026 • Belgian Regional Regulations
This guide has been reviewed and updated to incorporate all Belgian vehicle tax reforms in effect as of January 2026.
The entry into force of the reformed Vehicle Registration Tax (TMC / BIV) in the Walloon Region establishes an individualized tax calculation based on power (kW), certified emissions (CO₂), and Maximum Authorised Mass (MMA). Here is a segment-by-segment comparison illustrating exact tax adjustments across popular vehicle types.
1. Formula and Statutory Constraints
TMC = Base Amount (kW, age) × (CO₂ / 136) × (MMA / 1838) × C
The statutory liability is constrained between a minimum floor of €50.00 and a maximum cap of €9,000.00.
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