6. Brillantmont International School
You may have already caught onto the fact that a lot of the most expensive boarding schools in the world in 2017-2018 are located in Switzerland. Not only is it a beautiful, peaceful, and overall safe place to be, but Swiss education has a reputation for being one of the best in the world! However, just because a school is located in Switzerland doesn’t mean it stays true to these above-average standards. Brillantmont is Swiss-owned and operated, ensuring this boarding school lives up to their level of quality. A lot of these schools also boast about their family-oriented environment. BM has been owned by the same family for over 135 years, which gives them the edge they need to compete with the other most expensive boarding schools in the world in 2017-2018. That and the fact that their location in Lausanne, Switzerland is home to the International Olympic Committee, which makes BM very serious about their sports teams justifies their tuition to be anywhere from $76,856 to $90,543 a year.