Alfred is a mergers and acquisition lawyer. He works independently and is just starting off in this field. Alfred lands a big client, but Alfred needs money to pay off his rent and for the resources for the case. His client offers him a loan; Alfred would have to pay back this loan plus 5% interest. Is this wrong according to jewish law? Also can you give me some rescuers that you to find this answer?
This loan is the same as any regular loan in Jewish law, whereby it is forbidden to take out or give a loan on interest. However, this can be permitted by means of a heter iska (see here).
The other element that might be involved in this case is the question of the ethical code for attorneys. Of course, an attorney has to abide to the ethical code of his profession.