Is it permissible for a company to deduct a portion of an employee's salary if they do not achieve a certain level of sales, given that this condition was not part of the original employment contract?

What the company did by linking the employee's salary to sales and profits is a violation of Islamic law and regulations, for several reasons: 1. Breach of Contract: This contradicts the principle of fulfilling contracts, as the employee must perform their work and the company must pay the agreed-upon wage. 2. Uncertainty of Wage: This procedure makes the employee's wage unknown, whereas it is a condition in an ijara (leasing/hiring) contract that the wage must be known. 3. Entitlement to Salary upon Attendance: The employee is entitled to their salary for their attendance at the agreed-upon time and place, regardless of the completion of work or the company's profit or loss. A private employee is entitled to the wage simply by making themselves available for work.

Therefore, what the company decided is null and void according to Islamic law and regulations. No part of an employee's salary may be deducted except for negligence or damage, and the company must return the deducted amounts.