A computerized method and system for rebilling a carrier bill is disclosed. The method includes receiving one or more carrier bills for a plurality of mobile phones at a processor, receiving a selection of a ratio for distributing the total fee amongst the plurality of mobile phones from an administrator device at the processor, determining, with the processor, an average cost per mobile phone based on the ratio multiplied by the total fee and divided a total number of mobile phones in the plurality of mobile phones, determining, with the processor, a cost-per-time for each of the plurality of mobile phones based on one minus the ratio multiplied by the usage time of each of the plurality of mobile phones and divided by a total minutes, and determining, with the processor, a total cost for any of the plurality of mobile phones.