During an appearance on Dutch television showVandaag Insideon Thursday evening, De Telegraaf journalist Valentine Driessen revealed: "At Ajax, Henderson will receive €4.5m (£3.86m) in salary per year, and €1.5m euros (£1.28m) in signing fees."
Not including the signing fee, Henderson will take home roughly £74,000 (94,000) per year in wages.