A scoring engine computing device for generating personalized lending scores is provided. The scoring engine computing device receives a request including a cardholder identifier associated with a candidate cardholder, determines demographic data associated with the candidate cardholder, and retrieves transaction data for a plurality of cardholders including the candidate cardholder and a set of peer cardholders. Each cardholder of the set of peer cardholders is associated with the determined demographic data of the candidate cardholder, and the transaction data is associated with transactions for a plurality of spending categories. The scoring engine computing device further normalizes the transaction data associated with the candidate cardholder by category, generates a personalized lending score associated with the candidate cardholder that indicates a spending trend of the candidate cardholder, and transmits the personalized lending score to a requestor computing device.