Is it permissible to work in providing labor to a foreign company without its knowledge, by paying workers' salaries from private funds and splitting the profits, knowing that a portion of the profits comes from the difference in the salary paid to the worker by the company, and is fixing the profit margin for the provider permissible?

It is forbidden for an employee to supply workers to a company if the company prohibits it. If he violates this, he commits a sin. However, what he earned from this work is not forbidden to him.

Moving beyond this point, supplying workers to a company falls into two categories:

1. The supplier hires workers and then leases them to the company: This is permissible if the workers agree to it. It is also permissible for the supplier to pay the worker less than what he receives from the company, provided that the worker agrees to work directly for the company. Otherwise, the supplier is not allowed to lease him to others.

2. The supplier acts as an intermediary between the workers and the company: He is allowed to take a known fee for his mediation from both parties (the workers and the company). It is also permissible to agree with the worker to take a percentage of his salary, provided that the duration is specified and the worker's salary is known.

As for paying salaries on behalf of the company, if it is stipulated in the contract, it is forbidden because it leads to the combination of a loan (salaf) and a transaction (mu'awadah), which is a loan that brings benefit. However, if it is a voluntary act by the supplier without any condition, there is no harm in it.