Share of Wallet (“SOW”) is a modeling approach that utilizes various data sources to provide outputs that describe a consumers spending capability, tradeline history including balance transfers, and balance information. These outputs can be appended to data profiles of customers and prospects and can be utilized to support decisions involving prospecting, new applicant evaluation, and customer management across the lifecycle. The outputs include the size of the consumer's spending wallet over a particular time period, the total number of the consumer's revolving cards, the consumer's revolving balance, the consumer's average pay-down percentage for revolving cards, total number of the consumer's transacting cards, the consumer's transacting balance, a number of balance transfers transacted by the consumer, the total amount of the consumer's balance transfers, the consumer's maximum revolving balance, the consumer's maximum transacting balance, the consumer's credit limit, size of the consumer's revolving spending, and the size of the consumer's transacting spending.