In Hungary, all motorways and expressways marked with an "M" must be paid for.
All vehicles up to 3.5t (including motorbikes) and motor caravans, whatever their weight, must carry an electronic vignette.
The digital sticker is available online at https://ematrica.nemzetiutdij.hu/ as well as at border crossings, petrol stations and from the Hungarian Automobile Club MAK.
Vehicles over 3.5t (with the exception of motor caravans) use an electronic toll system.