Is it permissible for a marketing manager to take a percentage of profit in exchange for designing brochures for subsidiary companies without the parent company's knowledge, especially since this is not part of his core duties and saves money for the subsidiary companies?

If a person performs work for another with their permission but without an agreement on wages, scholars have differed on three opinions:

1. He is not entitled to wages; his work is considered a donation. This is the preponderant view. 2. He is entitled to the wage of the like (customary wage). 3. He is entitled to the wage of the like if he is known for working for wages; otherwise, no.

Based on the preponderant view, it is not permissible for you to deduct a percentage of profit as compensation without prior agreement, and deducting it without the company's knowledge is considered a breach of trust, which Allah and His Messenger have forbidden.