Credit cards are actually no strangers to many people. Credit cards are used more. Most people naturally hope that the higher their credit limit, the better. For the credit line, in fact, we have an invisible credit line besides the normal credit card line. What is the invisible limit of credit card? The so-called credit card invisible limit is usually only used when the cardholder swipes the card. Generally speaking, sometimes the amount of our credit card is greater than the remaining amount, but we can still make a successful transaction because there is still an invisible amount in the credit card. Usually, in order to allow cardholders to use more credit lines, banks will give an additional credit line of 10% on the basis of fixed credit lines, but this credit line is not on the surface, so it is called invisible credit line. For example, the credit card line is 30,000 yuan, the bank gives 10% of the invisible line of 3,000 yuan, and the remaining available line is 1000 yuan. If you want to swipe the invisible limit, the credit card amount must exceed 1000 yuan, and it cannot exceed 4000 yuan. It should be noted that the invisible line is subject to an over-limit fee, and the credit card invisible line can only be paid off in one lump sum after use, and it cannot be repaid in installments or the minimum repayment amount.