FASTag issued by certified banks can charge maximum of Rs 100 for each tag, which is fixed by National Payments Corporation of India (NPCI). However, the actual tag issuing charges are defined by the bank and may vary from bank to bank.
ICICI bank is selling FASTag for car at Rs 499.12 in the following manner:
Rs 99.12 for Tag issuance fees
Rs 200 for Refundable Security Deposit
Rs 200 for first recharge amount in wallet when the wallet is been created
The top up charges may vary from bank to bank and this difference can be seen on respective banks’ website.