In order to settle the sales transaction of an item in a cabin, an item detection unit of a vehicle settlement system detects removal of the item from an item arrangement unit provided in the cabin. An item monitoring unit monitors movement of the item when the item detection unit detects the removal of the item. A settlement processor settles the sales transaction of the item detected by the item detection unit when a predetermined condition is satisfied after the item monitoring unit detects the movement of the item out of a vehicle.