The method of paying off the credit card installment payment in one lump sum is as follows:

1. Open the bank APP or online banking, find the option of credit card installment payment, and check the installment bill and the number of remaining installments.

2. Call the bank’s customer service number, tell them that you want to pay off the installment bill in advance, and ask if it can be done and what handling fees or liquidated damages need to be paid.