Belgium truck toll: CO2 class on every OBU by 1 July 2026

Belgium's Viapass authority will add a CO2 emissions surcharge to the kilometre charge in Flanders from 1 July 2026, and every heavy goods vehicle registered for the Belgian toll must have a declared CO2 emission class on its On-Board Unit (OBU) by that date, even vehicles driving only in Wallonia or Brussels. With 42 days to the deadline, foreign hauliers transiting the Antwerp-Zeebrugge corridor and the cross-border lanes from Germany and the Netherlands face one of two Benelux toll changes landing on the same day, alongside the Netherlands per-kilometre toll launch covered yesterday.

How the Flemish CO2 surcharge works

Today, the Belgian kilometre charge is calculated from three parameters: the region (Wallonia, Flanders, or Brussels), the gross vehicle weight band (3.5 to 12 tonnes, 12 to 32 tonnes, or above 32 tonnes), and the Euro emission norm. From 1 July 2026, Flanders adds a fourth parameter : the EU CO2 emission class, scored from 1 (least environmentally friendly) to 5 (zero-emission only). The lower the class, the higher the surcharge per Flemish kilometre.

Five classes apply. Class 5 is reserved exclusively for fully zero-emission vehicles such as battery-electric and hydrogen trucks. Vehicles first registered before 1 July 2019 are automatically assigned Class 1, the highest surcharge band, unless the operator provides documentation proving a better class. Wallonia and the Brussels-Capital Region will not yet charge for CO2 on 1 July 2026, but Viapass has stated the parameter is likely to be activated in those regions later, so every OBU on the Belgian network needs the class on file regardless of the route.

Who needs to act, and how

Every operator with a Belgian-toll OBU is affected, including foreign hauliers running occasional trips through Flanders. The action is to register the CO2 class on each vehicle through the operator's accredited service provider before 1 July 2026. The six accredited providers are Axxes, Satellic, Telepass, Toll4Europe, TotalEnergies Marketing Services, and W.A.G. Payment Solutions.

Viapass has published a free CO2 emission class calculator on viapass.be. The calculator needs three vehicle documents: the Registration Certificate, the Customer Information File (CIF), and the Certificate of Conformity (CoC). It returns a summary document the operator hands to their service provider, who then updates the OBU's settings. Operators who do nothing inherit the default Class 1, the most expensive band on every Flemish kilometre after 1 July.

What it costs and where the surcharge lands next

Baseline Flemish rates published by Viapass for vehicles above 32 tonnes run from EUR 0.204 per kilometre on Euro 6 to EUR 0.301 per kilometre on Euro 0 to 2; zero-emission trucks already enjoy a heavily reduced EUR 0.038 per kilometre on the same weight band. The 1 July 2026 surcharge layers on top of these baselines for Flemish kilometres only. The exact per-class multiplier is published on the Viapass rates page and is reflected in each service provider's billing.

The change implements Directive (EU) 2022/362 , the revised Eurovignette Directive, which requires member states to vary heavy-vehicle charges by CO2 class. Germany, Austria, and Denmark have already done so. The European Council clarified the framework on 4 March 2026 , simplifying the calculation method for member states still rolling out the variation. Accredited provider Satellic notes that the Flemish move sits inside this wider EU programme and that operators using its OBU should expect a settings update push from Satellic in the weeks before launch, but registering the class through the calculator remains the operator's responsibility.

Logifie's EU truck tolls country guide for 2026 explains how Belgium's per-kilometre charge fits alongside neighbouring tolling systems on the same corridor. For a compliance-aware freight quote that prices Flemish kilometres at the correct CO2 class after 1 July, or to browse current Belgian fuel and toll references , contact Logifie before the deadline.