In at least one aspect, the present invention comprises a system and method of creating a probability of delinquency database using historical loan data and a plurality of loan factors, for use in determining a loan rate, the method comprising: identifying a plurality of multi-level loan factors; creating a pool from the historic loan data, wherein the first pool contains records relating to the plurality of multi-level loan factors; separating the pool into a set of groups based on the multi-level loan factors, calculating a probability of delinquency for each group; and arranging the probability of delinquency for each group into a database such that the probability of delinquency for each group is accessible for any combination of multi-level loan factors.