A platoon travel system includes an extraction portion, an arrangement order determination portion, a schedule notification portion, a contribution degree calculation portion, and a charge portion. The contribution degree calculation portion calculates a contribution degree for each of the plurality of target vehicles using loss-gain information. The contribution degree is calculated with respect to a benefit of all of the plurality of target vehicles obtained by performing the platoon travel. The loss-gain information reflects the benefit obtained when the plurality of target vehicles participate in the platoon travel. The charge portion determines a charge amount for each of the plurality of target vehicles based on the contribution degree calculated by the contribution degree calculation portion when the platoon travel is performed based on the platoon information. The charge amount is determined for each of the plurality of target vehicles to fairly obtain an advantage.