Order amount = Transfer amount - Cashback/Discount applied + Service charges
The service charge added is calculated as per this table:
|Order Value (Rs)||Flat fees (Rs)|
Suppose you want to transfer Rs. 600 and you have 75 cashback, then total order amount = INR 600 - 75 + 10 = INR 535
NOTE : SlicePay charges same service charges for both Paytm recharge as well as bank transfer.