For every transaction at a toll plaza, you will receive an SMS alert on your registered mobile number about the balance deducted from your FASTag wallet.
There are 3 ways to check your FASTag wallet balance:
1) Give a miss call to 7406575500 from your registered mobile number
2) Login to the Kotak FASTag Customer Portal with your User Id to check balance
3) Call our Customer Care Number 1800 3006 9090 to know the balance
Note - The wallet balance can be used by all the vehicles linked to the wallet.