FASTag is a device that uses Radio Frequency Identification (RFID) technology for making toll payments directly from a prepaid account linked to it. It is affixed on the windscreen of a vehicle. By clicking on ‘Secure login ’, you accept that you have read our Terms & conditions, Privacy Policy and the Tips for Safe Banking Buy FASTag online with Kotak Mahindra Bank for seamless toll payments. Make FASTag recharge on the go with ease anytime from anywhere. Click here to apply for FASTag now! Kotak FASTag Portal / Customer Portal: Log in to your Kotak FASTag account (via portal) to view your balance, transaction history, and other details. Email Notifications: Kotak may also send periodic emails updating you about your transactions and balance status.