When to pay the road tax
In Italy the road tax can be paid in three period ranges and the deadlines are the following: January 30th, May 31st, September 30th. This period varies based on when the car was originally registered at the PVR (Public Vehicle Register). It is possible to know the exact amount to be paid and the date of the road tax expiry by clicking on the following link. https://www.aci.it/i-servizi/servizi-online/bollo-auto.html
Or going in person to the counter of the Italian Automobile Club in Italy.
Visit the ACI website to get more information
The road tax is subject to exemptions and cost reductions.