A computer travel system and methods for assessing travel service fees are described. System of the invention communicates, on one end, with a travel agent from a travel front office and, on the other end, with a system administrator who manages a price scheme database containing unitary fees and rules. Travel agent creates and modifies PNRs (passenger name records) from which service fees are assessed by a fee calculator. Fee calculator interfaces with the price scheme database to obtain unitary fees and rules to apply to get PNR service fees.System administrator can modify unitary fees and rules and use a fee simulator over a travel business history of PNRs to estimate what would have been revenue with the modified unitary fees and rule.System and methods of the invention enable an automatic assessment of travel service fees that can be recognized by the customer.