[3][4] It employs Radio Frequency Identification (RFID) technology for making toll payments directly from the prepaid or savings account linked to it or directly toll owner.

It is affixed on the windscreen of the vehicle and enables one to drive through toll plazas without stopping for transactions.

The tag can be purchased from official Tag issuers or participating Banks[5] which are Made in India and if it is linked to a prepaid account, then recharging or top-up can be as per requirement.

In January 2019, state-run oil marketing companies IOC, BPCL and HPCL have signed MoUs enabling the use of FASTag to make purchases at petrol pumps.

[9] Starting 1 January 2021, FASTag was to be mandatory for all vehicles but later the date was postponed to 15 February 2021.