Credit card installments will indeed have a certain impact on mortgage approval. When lending institutions approve a loan, they will comprehensively consider the borrower's credit status to evaluate his or her repayment ability and willingness to repay. Credit card installments are a form of debt and may drain a borrower's disposable income, affecting their ability to repay.

First, credit card installments increase the borrower’s debt burden. If a borrower already has multiple credit card installments, he or she will need to pay a higher monthly installment payment, which will reduce his disposable income and reduce his remaining repayment ability. Banks will take credit card installments into consideration when assessing a borrower's debt situation, which may result in a decline in the borrower's overall credit score.

Secondly, credit card installment may also affect the borrower's willingness to repay. If a borrower makes frequent credit card installments or has other bad credit records, lenders may have doubts about their repayment ability and worry about whether they can fulfill their commitments on time in future repayments.

Therefore, before applying for a mortgage loan, borrowers should use credit card installments prudently, avoid over-indebtedness, and always pay attention to their personal credit status. You can regularly obtain big data reports through Beijian Quick Check and other channels to understand your situation in online loan big data so that you can make more informed financial decisions. In addition, you should also pay attention to personal credit in daily life to avoid bad credit records, so as to maintain a good credit score and improve the success rate of loan applications.