Owning a Boost Juice franchise isn't cheap. First there is the $59,000 franchise fee, as well as the cost of fitting out the store and some ongoing royalty payments. The most frustrating thing about growing the business is the leasing side, Allis said.wning a Boost Juice franchise isn't cheap. First there is the $59,000 franchise fee, as well as the cost of fitting out the store and some ongoing royalty payments. The most frustrating thing about growing the business is the leasing side, Allis said.