1. When the bank system deducts money, the account balance is insufficient;

2. Upgrade the banking system and delay the deduction.

Different banks have different time points for the execution of mortgage account deduction. As soon as the repayment date arrives at the time of batch deduction, the system will automatically perform batch deduction. Insufficient account balance at the time of deduction may lead to the failure of deduction and make the mortgage repayment overdue. Some banks will deduct money from the second batch. If the lender fails to make up the difference, it will be overdue.

It is suggested to actively contact the loan bank to apply for deduction to avoid the influence of overdue on personal economic behavior.