In this study was evaluated the financial results after the implantation of an information system for selling shipping of packages, developed in-house in an inter-carrier charge in Lima through the variation of procedure 059 of MAIGTI methodology, which suggests the evaluation of the net present value considering additional incomes (contribution margin and savings) and additional expenses (additional investments and additional expenditures) with a discount rate in a evaluation period similar to long term planning period according to the type of entity in which the evaluation was realized. The implantation of the information system of packages shipping obtained S/. 138,070 new soles (approximately US$ 48,446) as net present value after the first year, and S/. 1,178,996 new soles (approximately US$ 413,683) as net present value after the third year, due the increment of loyalty of clients through the reduction of time to 70% in the emission of bills and for avoiding losses due a proportion of clients didn't hire the service because the emission of bills was manual. Also, the study demonstrates that the variation of procedure 059 of the MAIGTI methodology is valid for the evaluation of financial return of an information system in a transport firm.