Is there any interest for repaying Qu’s installment payment? There is no interest in Qu installment, but there is an installment fee. That is to say, the installment price is a little more expensive than the one-time payment price. It depends on the number of installments you apply for. The service fee will be automatically calculated by the Qu installment system. The handling fee for each installment is different according to the number of installments. Please see the table below for details of the current charging standards: