A management server is configured to perform a process including: obtaining, when an electric vehicle is returned, returning date and time, a returning location, and a use history of a vehicle; setting a fee-returning rate in accordance with a SOC at the time of renting, a SOC at the time of returning, the number of times of performing behaviors contributing to deterioration of a battery, and a leaving time in a state contributing to the deterioration of the battery; setting a correction coefficient in accordance with a cause of a behavior contributing to the deterioration; setting the fee-returning rate in accordance with the returning location and the returning time; determining the fee-returning rate; and performing a process for providing points corresponding to the fee-returning amount.