Is it permissible to employ workers in an establishment for three hundred riyals per month for each worker, with their consent?

It is not permissible to take money from workers in exchange for recruiting them, due to the uncertainty (gharar) involved in such dealings, and because an unknown fee is invalid. However, it is permissible to take a known fee from them, either in one lump sum or in installments. It is important to be aware of the Shariah violations that may taint such works and contracts.