Crediti Score Definition: A credit score is a numerical value that ranks individuals according to their credit historyi at a given pointi in time. Your credit score is based on your past payment history, the amount of credit you have outstanding, the amount of credit you have available, and other factors. According to Fannie Maei, one of the major investors in home loans, credit scores have proven to be very good predictors of whether a borroweri will repay his or her loan. Understanding your credit reporti score before you apply for a home loan can save you lots of time and money in the end.