Is it permissible for me to direct customers of the car dealership where I work to a nearby insurance company in exchange for a commission, knowing that the company I work for does not offer insurance services and its interests will not be affected by this referral?

The benefits accrued by an employee during official working hours are the property of the employer. Therefore, it is impermissible for the employee to undertake private work for himself or others, except with the employer's permission or if customary practice allows it. Furthermore, it is not permissible to direct customers to commercial insurance companies, as this constitutes cooperation in sin and aggression.