Plantar warts are actually common warts that occur on the feet and are a viral infection caused by infection with the human papilloma virus. In general, the cost of a plantar wart is about $20. So how much it costs depends on the number and size of the free and the number of times it needs to be treated. You can also use carbon dioxide laser cautery or surgical excision, then these methods are not the mainstream methods, the cost is also appropriate to be more. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things.