What is the standard for charging construction labor agency fees

The maximum charge standard is 3% of the contract price of the construction project. According to the query "construction project bidding management regulations" shows that in the implementation of construction projects, intermediary organizations can provide intermediary services for both sides, as well as for the construction unit to provide relevant management services, charge engineering intermediary fee. The maximum standard for the intermediary fee is 3% of the contract price of the construction project. And, engineering intermediary fees charged by the standard, need to be clear in the bidding documents, by the construction unit and the bidder to determine the two sides of prior consultation.