Author: Vinetki.bg

From 1 June 2026, the toll for vehicles over 3.5 t in Bulgaria also depends on the vehicle’s CO₂ class. The less carbon dioxide a truck emits, the lower the toll can be.

What is a CO₂ class

The CO₂ class shows how much carbon dioxide a vehicle emits. It comes from Directive (EU) 2022/362, which requires EU countries to include CO₂ emissions in toll rates.

The class does not depend on the truck’s age or make. It is based on the technical data declared by the manufacturer, above all the certified CO₂ emissions. These emissions are compared with the reference emissions set by the European Union for the relevant vehicle group. The further the emissions are below the reference value, the better the class.

There are five classes. Class 1 is the most expensive and class 5 the cheapest.

Classes 2–4 are valid for 6 years from first registration. After that, the system of the Road Infrastructure Agency (API) automatically reclassifies the vehicle.

Where in Europe tolls already depend on the CO₂ class

The CO₂ class affects the toll in most countries with distance-based tolling in Central and Northern Europe.

In Wallonia and Brussels, the CO₂ class does not currently change the rate for trucks with internal combustion engines. Poland, France, Italy, Spain, Portugal and Croatia do not yet differentiate tolls by CO₂ class. There, the toll depends on weight, number of axles and the Euro emission class.

Who needs to enter data

The deciding factor is the vehicle’s date of first registration.

• Registered before 1 July 2019: you don’t need to do anything. The vehicle is automatically in CO₂ class 1.
• Registered after 1 July 2019 with Euro 6 emission class: you need to enter technical data. This is the only way to get a class from 2 to 5.

If you don’t enter data, you won’t be fined. The vehicle simply stays in class 1 and pays the highest rate. Please note that a new registration does not guarantee a better class. If the data does not meet the requirements for classes 2–5, the vehicle stays in class 1.

What data you need and where to find it

Prepare the following data in advance:

• date of first registration;
• technically permissible maximum laden mass (field F.1 in the registration certificate);
• specific CO₂ emissions in gCO₂/tkm;
• vehicle group and subgroup.

If you don’t know the subgroup, specify instead the axle configuration (4x2, 6x2 or other), the vehicle type (lorry, bus or tractor unit), the engine power in kW and the cab type (day or sleeper).

The data can be found in these documents:

• vehicle registration certificate;
• COC (Certificate of Conformity) or CIF (Customer Information File).

If you don’t have a COC or CIF, request them from the vehicle manufacturer. If you get a class above 1, keep the documents, as you may be asked to provide them.

How to determine the CO₂ class in TollPass.bg

If you have a contract with TollPass, you can enter the data online:

1. Log in to your TollPass.bg account.
2. In the “Vehicles” menu, select “Manage” for the relevant vehicle with Euro 6 emission class.
3. Click “Enter CO₂ classification data” and fill in the data from the documents.
4. The system of the Road Infrastructure Agency calculates the class in real time and you see the result immediately.

Important: the data is entered only once and cannot be corrected. Check it carefully before confirming.

If you want to see first which class the truck would fall into, use the TollPass CO₂ calculator. The CO₂ classification page also has a video with all the steps.

Frequently asked questions

My truck is Euro 6. Isn’t that enough?
No. The Euro class and the CO₂ class measure different things. Euro 6 is only a condition for applying for a better CO₂ class.

Is there a deadline for entering the data?
There is no deadline and there are no penalties. Until you enter the data, however, you pay the class 1 rate.

I have a CO₂ class because I travel in Europe with TollPass. Do I need to do anything?
The class is calculated in the same way throughout the EU, now also in Bulgaria. Check your online contract.

Can I request a better class?
The class is calculated automatically according to EU-wide rules and is not granted on request. The result depends only on the vehicle’s technical data.

Sources

• CO₂ classification – TollPass.bg