We will reveal the exclusive contract SM Entertainment holds with its celebrities. Although this contract is the one between TVXQ and SM, it can be inferred that it is almost a basis contract for all the others. Also, as SM stated that the income division for TVXQ was the best they offered, one can surmise that the content of the contracts of other groups such as Girls' Generation, Super Junior etc. will be worse.
In the contract, it states that TVXQ must pay for all of the expenses required for their activities and this implies the wages for their managers and road managers. "TVXQ must pay for their travel fees and rent fees, as well as their meals, make up and coordinators' wages, dance crew and any other stage crew costs. They must also pay for the wages of their managers' monthly wages (The wages of the manager is 800,000 per month and the wages of road managers is 600,000 per month, and this increases by 10% every year.)"