On average, the cost of laser hair removal in the smaller, bikini area is between $350 and $500. By contrast, the cost of treating a larger area, such as the back, averages between $600 and $900 per treatment session. However, treatment of the chest will only cost between $350 and $600.ut removing hair on the face and neck is comparable to the cost of laser hair removal on the back, with prices averaging $600 to $900 per treatment. On an annual basis, the typical cost of laser hair removal can often be less expensive than waxing.