Do you know why unapplied cash income QuickBooks occurs? If you are a QuickBooks user you must know what unapplied cash income QuickBooks is. A few reasons can emerge for the event of the QuickBooks unapplied cash installment payment. One of them is that the installment might have been placed without deviating it and the type of sales. The sales of the product or service might get recorded in the ledger. This can permit the total amount to go to an unapplied cash installment pay account without getting the genuine transaction.