Raja Mukherjee another banker said “The impact of the credit card will be seen at the time of bill payment. In case of you default on your card payment, the bank will adjust the outstanding amount against your FD account. So, if you want to not hurt your investment, you will have to make sure that you always pay your credit card bills on time. People who opt for a credit card against fixed deposit primarily to build their credit score will face a problem if they default on their repayment. In such a case, not only will their FD be affected, but it will also have a negative impact on their credit score. Apart from this, in case of financial emergencies, you do not have to pre-close your FD account immediately, instead you can use your secured credit card to make the payment. As banks offer sufficient time in the form of interest free credit period to cardholders, they get time to repay the bills”.