tzGm instead of zGG

Last updated: 19.02.2026 Reading time: 5 Minute(s)

Difference between tzGm and zGG

The tzGm (technically permissible maximum mass, excluding persons) and the zGG (permissible maximum gross weight, including persons) each refer to the maximum mass at which a vehicle may be operated.

However, the two values differ in their specific meaning:

tzGm: Technically permissible maximum mass – excluding persons

  • The tzGm refers to the maximum technically permissible mass of a vehicle including cargo, but excluding persons.
  • The weight of occupants is not taken into account in the tzGm.
  • The tzGm relates to the maximum mass that the vehicle can carry and move according to the manufacturer’s technical specifications.
  • It takes into account the load limits of vehicle components such as the frame, axles, wheels and brakes and ensures that the vehicle can be operated safely without overloading these components.

zGG: Permissible maximum gross weight – unladen weight + maximum load + persons

  • The zGG describes the maximum permissible total weight including all occupants.
  • The zGG is generally defined by law and must not be exceeded.
  • In order to ensure road safety and protect road infrastructure, it is essential to avoid overloading.

Change as of 1 December 2023

Since 1 December 2023, the tzGm (technically permissible maximum mass, registration certificate Part I, field “F.1”) has been used as the basis for toll calculation. Previously, the zGG (permissible maximum gross weight, registration certificate Part I, field “F.2”) formed the basis for calculation. In addition, a transitional regulation applies: Vehicles whose tzGm exceeds 3.5 t but which were registered before 1 December 2023 and had a zGG of no more than 3.5 t at that time may continue to purchase vignettes and route tolls for vehicles up to 3.5 t tzGm until 31 January 2029.

The Europamaut team wishes you a pleasant journey!

In summary, the zGG is the legally defined upper limit for the permissible total weight of a vehicle in road traffic, while the tzGm represents the technically permissible mass that the vehicle may carry and move according to the manufacturer’s specifications. To ensure road safety and the reliability of the vehicle, it is essential to comply with both limits.

We wish you a safe trip to Austria and are happy to assist you with any questions regarding toll regulations. You can find detailed information about tolls in Austria in our guide. You are also welcome to use our route planner to plan your journey perfectly and see suitable toll products. If you have further questions about your trip or our digital vignette, please feel free to contact us via email.

Milena Paasch
Hey, ich bin Milena. Ich reise unglaublich gerne. Dadurch konnte ich schon viel sehen, wie beispielsweise verschiedene Staaten in den USA, die Niagarafälle in Kanada, mehrere Orte auf einer Rundreise durch Schweden, Spanien, Italien und noch ein paar andere faszinierende Orte. Außerdem habe ich schon immer leidenschaftlich viel gelesen und Texte geschrieben. Texterin zu sein, passt also fantastisch zu meinen Interessen. Ich versuche dem Leser ein spannendes und bereicherndes Leseerlebnis zu bieten und möchte, dass meine Texte gerne gelesen werden!
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