Qitzur Shulchan Arukh – 185:4
One doesn’t violate “do not keep overnight” and “do not allow the sun to come on him” [ie the prohibition against late payment of wages] unless the worker approaches him to collect and he has the money to pay him. But if the worker doesn’t approach him to collect, or he does approach him but he doesn’t have the money, he isn’t violating. In any case, it is a middah of piety to borrow [the money] and pay the worker on time, because he is poor and it is upon him that he carries his soul [he relies on the employer’s money to keep soul in body, a roof over his head, etc…].
Someone whose [usual] manner is not to pay the workers until after doing the accounting, even if they approach him to collect a small amount that is certainly coming to them, in any case he is not violating [this prohibition] since it is known tht this is his way, and on this knowledge they accepted work by him.