Yes, there is a small transaction fee charged by the bank & the payment gateway to process an online payment.
The charge is 2.5%
Example:
| Transaction Details | Account Balance (₹) |
Payment received from Customer | 1000.00 |
| Payment Gateway Charge Payment Amount * Transaction Fee * GST 1000 * 2.5/100 | -25.00 |
| Payment credited to your bank account | 975.00 |