Is it permissible to receive two different payments for the same work at the same time from two different people?

If the work you inquired about can benefit more than one person at a time, such as recording two tapes, then there is no harm in the wage differing from one person to another. This is because what matters is what is agreed upon with each individual. The wage is like the price, and both the price and the wage are valid based on what the contracting parties agree upon; there are no fixed limits for them. The important thing is that the transaction is free from deception, falsehood, and concealment of defects. The fundamental principle in transactions is the freedom of people to buy, sell, and dispose of their wealth within the rulings of Sharia (definition). There is no specific percentage set for profit; rather, this is left to the circumstances of trade and goods, while observing Islamic etiquette. Transactions must be free from unlawful elements such as deception, fraud, concealment of defects, and harmful monopolization.