KTC will be enhancing the Payment Gateway system on Tuesday, September 16, 2025, from 2:00 AM to 4:00 AM. During this period, KTC cardmembers and merchants will be temporarily unable to access the Payment Gateway, all online payment-related systems, and the KTC Mobile app.
For assistance, please contact: • Customer Service Center at KTC PHONE 02 123 5000 • Merchant Service Center Tel. 02 123 5700
We apologize for any inconvenience this may cause.